Publisher(s): QZX, Timex Sinclair Amateur Radio Users Group (TSARUG)
Individual Publisher(s): Alex Burr (K5XY)
QZX was a newsletter for people with a combined interest in amateur radio and the Sinclair—Timex computers. Hams would have regular "meetings" on-air. For example, one group met Wednesday nights at 10 p.m. EST on the 20 meter band, at about 14.345 MHz.
Peak publication of QZX was more than 300 copies per issue in the early 1980s. By 1987, circulation was at 100 copies per issue.
QZX was published by Alex Burr.
| Title | Description | Computers |
|---|---|---|
| “Type” Word Processing Program | Here’s another nice program from Bob, and is a ‘must’ for those of you needing a ‘word processor’ on a shoestring budget. The program was used to create the article, so you can actually see what it does. | Timex/Sinclair 1000, Type-in program |
| (1000) 232 = 2050 | Converting the TS 2050 to work as a RTTY modem. | |
| 10 Minute Timer Program | This one prints ‘Time to I.D.’ in BIG letters when time expires. It is accurate over a ten minute period, not quite as good as a stopwatch. Now everyone will need 3 ZX’s: one for timekeeping. one for RTTY/CW use, and one for logging! | Timex/Sinclair 1000, Type-in program |
| 10-10 Sort Program | Here’s a nice program for use with the 10-10 numbers. Cecil says hello to KA1BPE, KE5CY, & WD5FMM who he copied on 12/3/83, but he was unable to be heard! For you newcomers, the 10-X (10-10) International Net, Inc. is a network of radio amateurs who work to promote activity and good operating practice on […] | Timex/Sinclair 1000, Type-in program |
| 16K RAM Inside the ZX81 | This article is adapted from one written by John Bell which appeared in the November 1987 issue of L.I.S.T. It applies most directly to readers who have the ZX81, TS1000, or the PC8300. The last mentioned computer is a somewhat modified copy of the Sinclair computers and has a very similar internal layout. | Timex/Sinclair 1000 |
| 1993 Calendar | One-page text calendar. | |
| 1994 Calendar | One-page text calendar. | |
| 1995 Calendar | One-page text calendar. | |
| 2068 Second Screen | Most of us know that the 2068 has a second independent screen known as Display File 2 (see page 248 of the 2068 User Manual), but methods to easily use this screen are not widely known. My interest was aroused after drawing some elaborate Hilbert Curves on the main screen. I wanted to print a […] | Timex/Sinclair 1000, Type-in program |
| 24 Line I/O | The circuit given on the following page is for an add-on board that will plug into the ZX81’s rear connector and provide 24 bi-directional Input/Output lines. These could be used to control music synthesisers, model train layouts, or whatever you wish. Because the ZX81 has 1K resistors in series with the data lines DØ-D7, which […] | Timex/Sinclair 1000 |
| 800 Phone Numbers for Hams/SWL | ||
| A Complete RTTY Transceive System for the ZX81 and Spectrum | From the British Sinclair Amateur Radio User Group Newsletter done by Paul Newman, G4INP. (Reprinted with permission). Here’s a nice system, complete with TU, AFSK, and interface. We are only printing the ZX81 program, send SASE (to W4GHV) if interested in the Spectrum version. A PC board is available from G4INP. The British price is […] | Timex/Sinclair 1000, Type-in program |
| A few more comments on Cliff Nunnery’s RTTY program “NRAP” | The program is super. It certainly gives you all the nice things that are needed in a good RTTY program. Those have been well covered in previous articles. Cliff has done a super job. Interfacing problems with various transceivers will have to be solved on a one by one basis. Here are some comments on […] | Timex/Sinclair 1000 |
| A Short WP Review | Gesso Software has a word processor progran for the T/S 2068 and the 32 column printer. It is call “WP 32“. The best feature of this program is that you print exactly what is shown on the screen. It is easy to outtype this processor if you are a good touch typist. I rate it […] | Timex/Sinclair 2068 |
| A Simple Morse Decoder for the QL | Program to decode morse off the network port. | Sinclair QL, Type-in program |
| A Z80 machine language program to use the ZX81 as an audio frequency counter | Sinclair ZX81, Timex/Sinclair 1000, Type-in program | |
| Active Band Pass Filter Program | This neat program lets you design active bandpass filters (for CW, RTTY, etc) and actually draws a schematic of the results. Load time is about 3min l0 sec. When it is loaded, you will be presented with a menu that gives nine options. | Timex/Sinclair 1000, Type-in program |
| Add RGB to Your 2068 | RGB on the 2068 is probably one of the most gratifying additions you can get. The problem is that there is no simple way to do it and few companies (if any) have any to sell. E. Arthur Brown did have one they were selling for $19.95 which installed inside the machine, stripped the sync […] | Timex/Sinclair 2068 |
| AMSAT AMS-81 Tracking System | The AMSAT AMS-81 TRACKING SYSTEM (software version) is ready for distribution. AMS-81 provides accurate access schedule and tracking information for satellites in PHASE II and PHASE Ill type orbits. Hardware requirements include only the SINCLAIR ZX-81 or TIMEX/SINCLAIR TS-1000 with 16K RAM, video display and cassette recorder. | Timex/Sinclair 1000 |
| Antenna Design Program | Program provides assistance for half-wave dipole, 3 element Yagi, inverted vee, full wave loop, vertical, quad, and delta loop antenna designs. | Timex/Sinclair 1000, Type-in program |
| Antenna Pattern Maker | Allows you to derive a rectangular pattern of antenna response from signal level readings made at 18 points as the antenna is rotated. | Timex/Sinclair 1000, Type-in program |
| Assembly Language Made ‘Simple’ | The above title is both a bit misleading and a ‘substitute’ for the Editor’s Doings this month. No, I’m still not done with my RTTY setup, but it’s still on the front burner. I think I have mentioned earlier that assembly language programming is a bit addicting. Well, I was a bit fascinated and confused […] | Timex/Sinclair 1000, Type-in program |
| Back Issues | The table at the top of this page lists all the back issues of QZX. The figure in the box represents the number of issues available. An M means that over ten copies are available. A 0 indicates that the issue is sold out. If there is a number (or an M) in the back […] | |
| Back Issues & Tapes | Back issues of the original QZX are available from K2MI. See info in the unclassified ads (Jan 83 issue). When he runs out, we will probably collect these issues in a book: but do not hold your breath waiting for us. Order from Marty before he runs out (and to help him run out). We […] | |
| Battery-Backup and Entrycheck | Here is a simple sketch on how you can provide battery backup for your computer. Cost of parts is small, the 2N5193 can be replaced by almost any 3 to 4 amp PNP transistor. Also included is a short routine illustrating the usefullness of the CODE function in devising a “goof-proof” data entry method. As […] | Timex/Sinclair 1000, Type-in program |
| Bearcat 101 Scanner Program | Marty has had a lot of interest in his BC-101 program (see ad in previous QZX) and sent the program to QZX for publication. He says the Bearcat 101 is a more sensitive receiver than most, but is harder to use. It can be programmed for an extremely wide range of frequencies, but won’t work […] | Timex/Sinclair 1000, Type-in program |
| Bits & Bytes | This column will and try to track document the quirks, fixes, and unique modifications done to the Sinclair computers. We finally received a suggested name for this column from Vollie Miller, WB4TDB to whom we are grateful. Let’s hear from you. | Timex/Sinclair 1000 |
| Bits & Bytes | This column will try to track and document the quirks, fixes, and unique modifications done to the Sinclair computers. Let’s hear from you. | Timex/Sinclair 1000 |
| Bits & Bytes | This column will try to track and document the quirks, fixes, and unique modifications done to the Sinclair computers. Let’s hear from you. Here’s what we have this month: 23. Old 35 mm film cans are just the right size for storing printer tapes from the Mindware 16 column printer. 24. KAØOOQ has reported that […] | Timex/Sinclair 1000 |
| Bits and Bytes | Resetting the joystick port on the TS 2068 with a SOUND command. Machine language routine for TS 1000 to clear just the bottom of the screen. Programming hints for the 1000 and QL. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| Bits and Bytes | Differences in pull-up resistors between Z80 and Z80A/Z80B. Spectrum software may run on 2068. Bug in 2068 gives invalid value for INT(-65536). Monitor tips for QL. | Sinclair QL, Timex/Sinclair 2068 |
| Bits and Bytes | 25. VE1BRA says that since he put his ZX81 in a Hammond cabinet, there was no more use for the old chassis. He peeled off the keyboard and cut out the logos and glued them over the keycaps. The functions had to be cut out separately and glued on the front side of the Keycaps; […] | Timex/Sinclair 1000 |
| Bits and Bytes | ||
| Bits and Bytes | Timex/Sinclair 1000 | |
| Bits and Bytes | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| Bits and Bytes | Timex/Sinclair 1000, Type-in program | |
| Bits and Bytes | 171 On the TS 2068, you can get the paper color by entering E MODE/UNSHIFTED AND A COLOR 1-7. You must go back to the original color at the end of the line or all the lines will be the same color. | Timex/Sinclair 2068, Type-in program |
| Bits and Bytes | 178 – Many magazines carry ads for clear plastic covers for IBM type keyboards to protect them from spills and greasy fingers. The TS2068 and TS 1500 keyboards can be given much the same type of protection by laying a piece of plastic wrap such as Saran over them. The keyboard “feel” is preserved too. […] | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Bits and Bytes | 183 When debugging a program in FAST mode, the constant jumping of the picture as you move the cursor is annoying. Try this: Bring the line cursor (>) next to the faulty line.CLS EDIT (Shift 1) These operations will bring the faulty line to the bottom of an empty screen. Only the faulty line, and […] | Timex/Sinclair 1000 |
| Bits and Bytes | 185 A little mineral oil spread on the fingers only of the ZX81 RAM pack will reduce the number of crashes. 186 To put the TS2068 into CAPS lock mode POKE 23658,8. To take it out of that mode POKE 23658,0 187 To cause the TS2068 to PAUSE until a key is pressed (any key) […] | Timex/Sinclair 2068 |
| Bits and Bytes | 194 To adjust the delay between repeats on the TS2068 enter POKE 23562,X where X will be on the order of 1 to 5. 195 Some people get confused by the SAVE message “Start tape then press Enter”. On the TS2068 you just need to POKE 26689,38 to start saving immediately. 196 Have you ever […] | Timex/Sinclair 2068 |
| Bits and Bytes | 194 To adjust the delay between repeats on the TS2068 enter POKE 23562,X where X will be on the order of 1 to 5. 195 Some people get confused by the SAVE message “Start tape then press Enter”. On the TS2068 you just need to POKE 26689,38 to start saving immediately. 196 Have you ever […] | Timex/Sinclair 2068, Type-in program |
| Bits and Bytes | 203 On a TS2068 the following subroutine will return the elapsed time in seconds that a program has been running if you input a GOTO 9999 after line 1 has been run. 204 Here is a short TS2068 routine which will copy all 24 screen lines to the TS2040 printer. . To use this machine […] | Timex/Sinclair 2068, Type-in program |
| Butterworth Filter Design | This program for the Timex-Sinclair 1000 computer was written for completely automated design of Butterworth low-pass, high-pass, band-pass or band-stop filters. Modern solid-state transmitters are more prone to harmonic and parasitic frequency radiation, and therefore it is desirable for the radio amateur to have access to modern filter design in order to comply with present […] | Timex/Sinclair 1000, Type-in program |
| Circuit Symbols | The next page has a collection of circuit symbols. You might ask why put such a page in here. The answer is that these symbols are drawn according to nationally recognized standards. In general, standards are good because they help avoid misunderstanding and help people recognize patterns quickly. This feature is particularly important when larger […] | |
| Code Table | Here is a table which will be useful for those who are doing their own RTTY programing. As you know ASCIl is a standard code for the exchange of information. Baudot is an earlier incompatible standard. The ZX81 and T/S1000 use a completely non-standard coding (the T/S1500 uses the same coding as the T/S1000). Here […] | Timex/Sinclair 1000 |
| Contact List | “Contact List” is one of a series of programs making up the KA2LHO ham helper series. Contact List is a simple 1K routine which can be used either alone or as a subroutine in a larger program. | Timex/Sinclair 1000, Type-in program |
| Contest Dupe Program | Here’s another contest dupe program, useful for eliminating duplicate contest contacts. It requires 16K duplicate and holds 1600 calls. The band variable (B$) should be two characters. The program prints the calls by call areas for each band, but does not sort the calls. Hank used a modified version of KQ2F’s Roster Program (Apr QZX) […] | Timex/Sinclair 1000, Type-in program |
| Contest Log | “Contest Log” is one of a series of programs making up the KA2LHO ham helper series. Contest Log is different from other contest logs in that the actual printout is suitable for turning in as your logbook for a particular contest complete with declaration. | Timex/Sinclair 1000, Type-in program |
| Corrections | There are two corrections to the article entitled Correction in the December 1988 issue of QZX. The first month mentioned should read April. The second month should read October. You may well question the utility of these long overdue corrections, but the errors were discovered only recently as I was building an index for QZX, […] | |
| CWSS CW Program Mods | Jon took his ZX & CWSS to OE2-land and had to make a few mods to get them working. He says 20wpm came out at 30 over there. By clipping resistor R30 he corrected the TV scan rate and he wrote the following program to convert the CWSS speeds for overseas use. | Timex/Sinclair 1000, Type-in program |
| CWSS CW Program Mods | Changes to the CWSS program to add a practice mode. | Timex/Sinclair 1000, Type-in program |
| Deluxe QSL Printing Program | I know we have printed other QSL printing programs, but this one from Bob looked a little fancier than most, so here it is. He sent it ‘camera ready’ using his TYPE program and said he was out of ideas for articles! So, send him some inspirations, he writes nice articles! | Timex/Sinclair 1000, Type-in program |
| Differences Between the T/S 1000/1500 and the T/S 2068 | Simple chart that shows the keyboard and command differences. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Digitalker Speech Synthesizer | Following is a ‘term paper’ written by one of my students who tackled the job of interfacing the National Digitalker chip set to his TSI000. It really sounded nice. I hope the article is easily readable, the original was pretty faint. (I gave him an A for the project anyway.) | Timex/Sinclair 1000, Type-in program |
| Direct Video Mod | Here’s a video reverse/clean-up mod that started as W4MHQ’s “Direct Video Output” in QZX VOL.1 NO. 2. Like W4MHQ’s, this circuit uses a 75451 to do the output switching. The values of the resistors that define the pedestal and P-P video levels of the output were changed to very nearly duplicate the video signal at […] | Timex/Sinclair 1000 |
| Direction Finding Program | This slight rewrite of the usual direction finding program provides antenna pointing information for locations having a known long/lat. It also tells sailors which way to ‘set sail’ and how far they gotta float to reach far away places. | Timex/Sinclair 1000, Type-in program |
| DXCC Program | This program, useful for keeping track of your DXCC countries worked, was submitted in such an excellent form that all we had to do is ‘shrink it and shoot it’. It starts on the next convenient page. For you ‘non-hams’ it could be easily modified for other uses. | Timex/Sinclair 1000, Type-in program |
| E-Z Load Modification | Based on the information on the recorder to computer interface for the ZX81 which appeared in the Jan 8 3 issue of QZX, I have experimentally devised the following simple matching network for my machine. It consists of only two parts aside from the connectors and enclosure – a 0.1 or 0.2 uF capacitor and […] | Timex/Sinclair 1000 |
| Editor’s Doings | Here’s mish-mash (is that spelled rite?) of what I have been doing in between the sessions spent on my TRS80 preparing this newsletter. 1… The M-64 64K memory board was completed without hitch. (see review) 2… My ZX81 was “modified” for direct video output. I thought it took more than just a wire, judging from […] | |
| Editor’s Doings | Here’s a mish-mash (is that spelled rite?) of what I have been doing in between the sessions spent оп my TRS80 preparing this newsletter. 1. The Votrax speech synthesizer circuit for the ZX/TS was completed and software development is underway. It uses the phoneme approach, having 61 and 3 pauses. Additional features include an adjustable […] | Timex/Sinclair 1000 |
| Editor’s Doings | Well, we made it both ways without a hitch. Even the weather cooperated, keeping the humidity & mosquitos to a minimum. I did get my annual exercise of the car’s windshield wipers though. Returning to good ol’ New Mexico, I found the mailbox full of new subscribers and lots of good articles. I don’t know […] | |
| Editor’s Doings | Well, was the June issue worth waiting for? I ventured over to a professional print shop, had 500 copies made and not only was pleased with the price, the quality was EXCELLENT! So, keep our subscriber list above 500 and we have it made. I am still experimenting with print styles and sizes and hope […] | |
| Editor’s Doings | What a relief! After putting the July/Aug QZX together I was able to take a week off, as far as QZX goes that is. First, for you fledglings still new to computers, that was NOT an aerial map in QZX (note no swimming pools, crooked roads, etc). It was a much magnified photo of a […] | Timex/Sinclair 1000 |
| Editor’s Doings | First, I want to apologize for the late issue. I do have several legitimate ‘excuses’, but the predominant one being an urgent desire to ‘take a short breather’ after getting an already late issue out. In an attempt to get caught up, Alex and I are already putting the November issue together and hope to […] | Timex/Sinclair 1500 |
| Editor’s Doings | How many of you bought your Sinclair with intentions of putting it on RTTY? How many have successfully accomplished the task? Hopefully this issue will inspire the procrastinators into getting on RTTY, it is a lot of fun. I was first exposed to it in 1969, working a VK on my very first СО! I […] | Timex/Sinclair 1000 |
| Editor’s Doings | First, IF THERE ARE ANY ERRORS IN YOUR QZX EXPIRATION DATES, LET ME KNOW. We are going thru a transition period on our mailing labels programs and screw ups are likely! If you have not been contacted about ‘payment’ for articles submitted and printed in QZX thru the OCT 83 issue, LET ME KNOW. If […] | |
| Editor’s Doings | While getting on RTTY remains on ‘the front burner’, I have been fiddling a bit with a few machine language programs. I had a lot of fun with the Scientific Software’s Disassembler reviewed in the last issue, it came in pretty handy making back-up copies of all my ‘protected’ tapes. Next, I became intrigued with […] | |
| Editor’s Doings | Alex overwhelmed me with material for this issue, we picked up a few ads, and I am trying to get both March & April issues ready. | |
| Editor’s Doings | First, I want to apologize for the faint printing in the last issue. I knew my printer ribbon was about gone but didn’t know it would come out that bad! Second, I’m running behind as usual, trying to finish up the semester. If by chance any of you are interested in college teaching, have a […] | Timex/Sinclair 1000 |
| Editor’s Notes | ||
| Editor’s Notes | Well, the printer did it again. I got yet another price for doing the May issue. (That sentance sure looks familiar) Furthermore they mispaged it, but they ran it again at no charge. I am not really complaining because their cost is significantly less than any alternative. This month starts an active summer for me. […] | |
| Editor’s Notes | Well, the printer did it again. I got yet another price for doing the June issue. (That sentence sure looks familiar.) I also got all the QZX money back after the savings and loan organization it was in collapsed. After it was closed, it was announced that people could start getting their money back at […] | |
| Editor’s Notes | Well, I did get a new printer. However it had a completely differ at set of operating codes so I had to reformat QZX, a time consuming job. However it is a faster, easier to wu printer so I wil get that time back in the coming months. The type is a little easier to […] | |
| Editor’s Notes | User group membership is an interesting statistic. A recent issue of the NESQLUG (or New England Sinclair QL Users Group) listed 38 members, which must make them one of the largest user groups left (almost half of them did not live in New England). I keep track of a number of MSDOS public domain programs […] | |
| Editor’s Notes | One of our advertisers is missing. Indeed another of the Sinclair family of product sellers has gone. Some will have noticed that the advertisement for T&C Services was not in the last issue of QZX. That business has disappeared into the woodwork. The telephone number which has graced the pages for more issues than I […] | |
| Editor’s Notes | In the unclassifieds there has been offered a FREE 16 K RAM for some time. Anybody want it? I am getting tired of printing that ad. The “Hacker” is back. Some of you will remember the Hacker as one of the better newsletters published by Timex-Sinclair clubs. It expanded its coverage to include MS-DOS machines […] | |
| Editor’s Notes | The RAM for a long time offered in the unclassifieds is gone. It was claimed by Ralph Vasko, a longtime subscriber. He will add it to a collection of Sinclair equipment which was started by a long time friend who has since died. It is said that it is the largest Sinclair collection in the […] | |
| Editor’s Notes | The QZX history in the last issue ran a little longer than I had planned so there was only that article and the calendar. I am sorry that the calendar was late so that the first month of the year has almost already gone. All I can promise is the rest of the months will […] | |
| Editor’s Notes | The big news this issue is that the complete QZX index is almost ready to be printed. For details, see the article, QZX INDEX. I am sorry that the last issue was later than usual. I think that I am getting a psychological block so that when I finally collect the requisite number of pages, […] | |
| Editor’s Notes | The big news for this issue is still that the complete QZX index is ready to be printed. For details, see the article, QZX INDEX. I have just received a notice that the International QL Report is organizing a QL get-together to be held in Newport, RI on the 5th of June. For more information, […] | |
| Editor’s Notes | There is a special reason that I made a big effort to get this issue in the mail in the appropriate month for the first time in quite a while. You will note that this is the April issue and that it should have gotten to you about the first (even if it really did […] | |
| Editor’s Notes | Well I made it. Last month I actually mailed QZX in the month listed on the cover. Unfortunately I slipped again this month. The reason is the Index. All my effort has gone into finishing the index. And the Index is completely finished and mailed to those who bought advanced copies. For more information see […] | Sinclair QL |
| Editor’s Notes | I would particularly like comments about the article in this issue on the various Sinclair computers. Most of you already know most of the information in the article, but the average ham who might come across a Sinclair computer at a hamfest sale does not and could use a little guidance as to just what […] | |
| Editor’s Notes | It is just possible that I may get this issue put together in time for it to be mailed in July. If I do, you will get it mailed from the Air Force Academy in Colorado. It will be quite a while before I get back to Las Cruces, however, so the August issue will […] | |
| Editor’s Notes | Well I got back to Las Cruces as planned, after driving more than three thousand miles. Because most of my hamming is done while mobile, I talked to lots of hams too, mostly on 20 meters. The QSO’s even included some DX. The stay at the Air Force Academy was particularly interesting I attended a […] | |
| Editor’s Notes | A second printing of the index has been completed and the copies sent off to those who ordered them. A few minor corrections were made in it. The copy center at which I had it done made a mistake and ran off more copies than will ever be sold in 100 years. Of course, І […] | |
| Editor’s Notes | It is hard to get QZX caught up. I am now traveling around a bit, which makes it even harder. I had prepared the last issue in Las Cruces and took it with me to San Diego to be copied and mailed. Unfortunately someplace between the computer printer and the Xerox shop in San Diego […] | |
| Editor’s Notes | Proof reading is never done. Ten seconds after I glanced at the last issue after sending it out, I spotted two misprints. One was in my own name too. This issue is technically the first in a new volume. It is the December issue, the first of Volume 12. Unfortunately this is being written in […] | |
| Editor’s Notes | Here is the January issue of QZX. Unfortunately it is the January 1993 issue, not the January 1994 issue. There are a lot of reasons, but the main one is procrastination. As the last issue mentioned, I was out of the state for the first half of the year and spent some time in Africa. […] | |
| Editor’s Notes | Ås promised, here is the next issue of QZX about two weeks after the first issue of the year (1994). The December issue promised a set of schematic symbols but they did not make that issue. They are in this one. In the last issue I discussed two reasons why the postal rate increase would […] | |
| Eight | Eight RF tuned circuit coil design and capacitor network problem solving programs. | Timex/Sinclair 1000, Type-in program |
| Electronics Workbench | Electronics Workbench is billed as the electronics lab in a computer by its creators, Interactive Image Technologies, LTD, 700 King Street W, Suite 815, Toronto, Ontario, Canada M5V 2Y6. It comes in three main versions, an MSDOS version, a Windows version, and a Mac version. The windows version reguires an IBM AT or PS/2 or […] | |
| Error Analysis Program | This program may be of interest to QZX readers who are also college physics students, as I am. As part of my lab assignment, I am required to include a mean value, standard deviation, and standard error of the mean from a set of given, or observed data. This error analysis program greatly reduces the […] | Timex/Sinclair 1000, Type-in program |
| Exploring the TS1000 Sinclair Logic Chip (SCL) IX | This month concludes the series with a discussion of some of the parameters used by the SCL and a few notes on the timing of some of the signals. | Timex/Sinclair 1000 |
| Exploring the TS1000 Sinclair Logic Chip (SCL) VI | This article is a continuation of the series which began in the October 1989 issue of QZX. The purpose is to explain the function of the SCL logic chip in the ZX and TS1000 series of Sinclair computers. This chip is a custom chip designed particularly for our computers. The previous articles gave some background […] | Timex/Sinclair 1000 |
| Exploring the TS1000 Sinclair Logic Chip (SCL) VIII | This article is a continuation of the series which began in the October 1989 issue of QZX. The purpose is to explain the function of the SCL logic chip in the ZX and TS1000 series of Sinclair computers. This chip is a custom chip designed particularly for our computers. The previous articles gave some background […] | Timex/Sinclair 1000 |
| Feedhorn Design Program | If you are into feedhorn design here’s a nice program (with screen dump) . | Timex/Sinclair 1000, Type-in program |
| Field Day Log Comments | K7FG writes that he agrees with all the comments that K2QF wrote in his very fine article in the February issue about his field day log program comments except for the item about scratching line 4412. He would rather change line 160 to DIM T$(7) so that one could correct a long entry error. In […] | |
| Flag Program | Timex/Sinclair 1000, Type-in program | |
| Formu-Calc | Provides formula calculations in five different areas of electronics, including: Ohm’s Law for direct current, resistance (series and parallel), inductance (series and parallel), and coil winding. Each section has its own menu to assist the user and all data is available in two forms: screen only or screen and printer. | Timex/Sinclair 1000, Type-in program |
| Goodby | Dear Alex, I could not allow my subscription to expire without first writing to you to express my thanks for a job well done. I have every issue of QZX ever published, including copies of all of K2MI Marty Irons’ original efforts. I’ve learned a lot with the Sinclair/Timex, and running the 40 meter QZX […] | |
| Ham Helper Program | This is an all-around ham operator assistance program originally written for the TRS-80 by Jack Martin (W6XW) and published in the Dec. 1982 issue of 73 Magazine. It can be an extremely versatile program for the ham shack with areas of operation being repeater directory, contest duping, third-party treaty directory, Q-signal directory and frequency allocation. […] | Timex/Sinclair 1000, Type-in program |
| Hawg Wild Software | HAWG WILD Software, Box 7668, Little Rock, AR 72217, has a number of programs for the Timex/Sinclair computers of particular interest to hams. One of these is a very nice code practice program written by KC9MR. This program comes in two versions on a high quality cassette. One version requires 16k of RAM while the […] | Timex/Sinclair 1000 |
| How to Convert a Surplus WC2050 Modem into an RS-232 SERIAL INTERFACE for your TS1000/1500/2068 | The purpose of this article is to show you how, with the addition of a few inexpensive components, you can convert a WC2050 modem board into a general purpose RS232 serial interface. In October of last year, Anchor Automation auctioned off several thousand completely assembled WC2050 Modem boards as electronic surplus. Fortunately for Timex users, […] | |
| Impedance Matching Program | Here’s a neat program that takes the work out of matching a transmitter to an antenna! Included is a ‘screen dump’ of the results. | Timex/Sinclair 1000, Type-in program |
| Index!! Index!! | KA2LHO has been working on an index of articles and programs the “new” QZX since it started in again. It has now been up completed through the October issue by the use of the TIMEX software package “VU- FILE“. He says that he will make the index available on tape to any QZX subscriber who […] | Timex/Sinclair 1000 |
| Index!! Index!! | KA2LHO has been working on an index of articles and programs in the “new” QZX since it started up again. It has now been completed through this issue by the use of the TIMEX software package “VU-FILE”. He says that he will make the index available on tape to any QZX subscriber who sends him […] | |
| K5MIL SWR Plot | SWR PLOT allows you to enter up to 10 frequencies and their corresponding forward and reverse power readings. The program will then calculate and plot the SWR for each frequency on a bar graph. The program will plot on one of two graphs according to the highest SWR calculated. If the highest SWR calculated is […] | Timex/Sinclair 1000, Type-in program |
| Loaded Dipole Design Program | Program for calculating the loading coil value required for dipole antennas. | Timex/Sinclair 1000, Type-in program |
| Loaded Dipole Design Program | Here’s the documentation and typical print outs for this program which appeared in the last issue. | Timex/Sinclair 1000, Type-in program |
| Log-Yagi Antenna Design Program | For all you antenna buffs, here is a menu driven program to design a log-yagi antenna. The only data needed is the bandwidth (lower and upper freq.). Any band or bands can be used from 3.5mhz to 148mhz. | Timex/Sinclair 1000, Type-in program |
| Maximum Usable Frequency Program | This program, named TSMUF-4, is enhanced version of Bob’s previous program TSMUP-2 and details on upgrading, as well as the program description follows the program listing. Bob notes that this program is not to be used for commercial purposes! | Timex/Sinclair 1000, Type-in program |
| Memotext Word Processor | MEMOTEXT is a word processing program by MEMOTECH written especially to run on the ZX-81, TIMEX/SINCLAIR 1000 computers. The program comes hardcoded on a ROM in a standard MEMOTECH module that plugs onto the expansion interface, so the program is instantly available with power on. There is a toggle switch on the module to switch […] | Timex/Sinclair 1000 |
| Mini Reviews | One product can highly recommend to users is the Upstate Labs Eprom Programmer at $39.95. It will program 2716, 2732, 2732A, and 2764 Eproms. The kit is complete except for a ZIF socket and high voltage (27-32V) power supply. The menu driven machine code software comes in two versions for low memory (14-16K) and high […] | Timex/Sinclair 1000 |
| Miscellaneous Comments | Correction: Jan issue, logkeeper program, by WA6DLI, change line 56 to read 56 Print “Enter S for search menu” to make it self explanatory when using. Only enter by GOTO 53, never RUN or you will lose your data. To save typing, the program is available for a 16k ZX81 on cassette for $8 PP […] | |
| Miscellaneous Comments | Following are some some ‘camera ready’ comments from John, KB4XH, with underlining emphasis supplied by your editor. The good words on QZX, and about XLR8 are appreciated. Evidently I wasn’t off base with my hasty opinion/recommendation of XLR8. | |
| Miscellaneous Utilities | Here’s four short, useful routines from Marty. One allows multiple numeric inputs at one time, the next allows multiple string inputs, the next allows deletion of a group of BASIC lines (by putting code in front and code behind), and the last allows deletion of a group of BASIC lines by entering first and last […] | Timex/Sinclair 1000, Type-in program |
| Moonbounce Program | Program to calculate the best time for attempting Earth-Moon-Earth communication. | Timex/Sinclair 1000, Type-in program |
| More Mods to the ZXAS-ZXDB | I read with interest the mods that Rob Suggs suggested in the May issue of QZX and finally got two mods that I have been using documented. The modification to ZXDB will enable a screen copy and I will leave that for last. The mod to ZXAS will be covered next. | Timex/Sinclair 1000, Type-in program |
| More on Z-XLR8 | This is not intended to be a “review”, will leave that exact detail to your fine reporting. I do want to offer encouragement to those who may be a little reluctant to try the “EPROM version.” Believe me, it’s the only way to go. | Timex/Sinclair 1000 |
| MUF Program | Following is a ZX81 adaptation of the maximum usable frequency (MUF) program from Dec QST. Instructions: Enter CLEAR before saving a copy to tape, this saves loading time. Save program by GOTO 9990. It will then run automatically when loaded. See the QST article for details. | Timex/Sinclair 1000, Type-in program |
| Net Roster Program | Here’s an updated and readable version of the program that appeared in the February 1983 issue. | Timex/Sinclair 1000, Type-in program |
| New Improved ROM Bugs — TS1500 Bug #1 | Here we go again. No sooner has Timex introduced their TS1500, with the new improved ROM that corrects the mistakes of the TS1000 ROM, than new bugs appear. It is a common occurance in computer programming that fixing one bug causes another. Unfortunately, when you put the programs on a ROM, there’s not much to […] | Timex/Sinclair 1500 |
| New Product | Check out the new toolkit by Pete Hoffman, Delphic Enterprises, Box 72205, Corpus Christie, 78472. They supply EPROMs for $18, with the Hunter board specifically in mind. It includes the best renumber routine I’ve seen yet (lets you renumber only part of a program if you want) as well free bytes, protect (extract) as and […] | Timex/Sinclair 1000 |
| Notes | HAWG WILD Software, Box 7668, Little Rock, AR 72217, announces a new series of programs for radio amateurs. They say that their present offerings are the direct result of an ongoing author search. T-S Horizons is a new magazine for the Timex-Sinclair user. It is small, inexpensive, and has a number of interesting articles hardware […] | Timex/Sinclair 1000 |
| Numbering Corrections | In the course of creating the index there were several changes or corrections noted that needed to be made in the identification of each issue. Two issues were double issues. Both were called the July-August issue. These double issues appeared in 1983 and 1987. In both cases all articles were listed in the index as […] | |
| Parallel Resistors | Short routine to calculate the value of resistors in parallel. | Timex/Sinclair 1000, Type-in program |
| Phased Vertical Antennas | A Sinclair BASIC program to print radiation pattern plots for phased vertical antenna arrays. | Timex/Sinclair 1000, Type-in program |
| Pi-Network Design Program | These programs might be of interest too some of the QZX subscribers. The program labeled “PI” draws a PI network and labels each component. It then instructs you as inputs to make. The end result is of course the value of the L and C in uH and pf. The program labeled “L Network” does […] | Timex/Sinclair 1000, Type-in program |
| Power Supply | “Power Supply” is one of a series of programs making up the KA2LHO ham helper series. Power Supply is a program for both the electronics hobbyist and the radio amateur. The program calculates proper component ratings for the construction of a full-wave bridge, single capacitor power supply. | Timex/Sinclair 1000, Type-in program |
| Products in Review | This column will provide reviews of hardware ‘ add-ons’, software, and books that are available for the Sinclair computers. Again, we will do reviews as our budget allows, or as they are loaned/donated by vendors review. Reviews done by for our subscribers will also be welcomed. | Timex/Sinclair 1000 |
| Products in Review | This column will provide reviews of hardware ‘add-ons’ software, and books that are available for the Sinclair computers. Again, we will do reviews as our budget allows, or as they are loaned/donated by vendors for review. Reviews done by our subscribers will also be welcomed. The first review i s about a Parrot. Not the […] | Timex/Sinclair 1000 |
| Products in Review | The first review was to be on the Z-XLR8. The wife’s packing our bags, I gotta get QZX mailed! I tried Z-XLR8 twice and LOVE it! If you are having reliable, but slow loads/saves, it is well worth the money. The 7 minute Gazeeteer program loads/saves in 56 seconds without fail! I promise to ‘do […] | Timex/Sinclair 1000 |
| Products in Review | The first review is from Russ, W9CQD. It is on the Byte Back Co. ‘s Telephone Modem ($119.95 kit). After waiting 5 weeks due to an ‘outage’ of circuit boards, I received my modem kit. The boards are a very good quality with silk screened parts locations. There are two boards plus the small extender’ […] | Timex/Sinclair 1000 |
| Products in Review | The first review is on Scientific Software’s TS100/ZX81 Assembler Debugger (ZXAD) (See the unclassified ads for ordering info) While I have used, both for enjoyment and on engineering jobs, many assemblers, debuggers, and monitors; I have only tried two on my Sinclair. Note my comments in an early issue on the serious shortcomings of the […] | Timex/Sinclair 1000 |
| Products in Review | Well, here’s a review of a neat add-on that I purchased recently. I was also able to talk the supplier into advertising in QZX, so look for their ad in an upcoming issue. I had been considering the Hunter Battery-Backup Memory Board for some time, and the July 83 Radio-Electronics Magazine construction article sold me. […] | Timex/Sinclair 1000 |
| Products in Review | First, here is a long overdue review of Fred Nachbaur’s SyncWare News. (See his previous contributions to QZX.) Since he isn’t a ham, we gave him a call of **** and he was grateful. Anyhow, in April ’83 he began Syncware News, and sent out a lot of complimentary copies. His publication is slanted toward […] | Timex/Sinclair 1000 |
| Products in Review | In the April 1983 issue of QZX, Larry Willson presented his RTTY program, If you were like me, the prospect of rtty made normal life impossible. That version of rtty was admittedly primitive; after a full screen on either transmit or гесеіvе, the program stopped. Never the less, it did work. When his “more sophisticated” […] | Timex/Sinclair 1000 |
| Products in Review | Here are a few comments from Larry, AF8J to update last month’s review of the AF8J RTTY interface/program: Both the ASCIl & RTTY modes have become one 2K program, written in machine language, and allows switching between modes. There is now a silk screened & tinned PC board available for the interface that can be […] | Timex/Sinclair 1000 |
| Products in Review | Sent to us from 2-Bit Software, P.O. Box 2036, Del Mar, Calif., 92014 was their Turning the Truth Tables software. It consists of four (2K) programs having an unusual entertaining & educational nature. Union Station is a game used to help you learn the logical meanings of ‘AND’ and ‘OR’. Various sketches are drawn and […] | Timex/Sinclair 1000 |
| Pseudo-ROM | The dot patterns for the displayable characters are held in a table in ROM, in locations 1E00 to 1FFF hex. The patterns are stored in order of the character CODE, 8 bytes being used for each character, corresponding to the 8 TV scan lines used to build up each character on the TV screen. The […] | Timex/Sinclair 1000 |
| Publisher’s Notes | Quantum Computing going out of business; American QLs being sold in England. | |
| Publisher’s Notes | ||
| Publisher’s Notes | Well, Bo put out some issues while I spent most of good the summer in Bangladesh. It was an interesting summer but l was glad to get back. I was serving as an advisor to their Atomic Energy Commission. Although they were installing one of the biggest IBM computers the floor above my office, the […] | |
| Publisher’s Notes | It was a relief to get the special RTTY issue out to you. A lot of effort went into that issue. There is, of course, a lot more to be said on that subject and we will say some of it in the future. | |
| Publisher’s Notes | I will start off these notes with a few comments generated by the many suggestions sent in with the renewal letters which we have been getting. Third class mail would be a little cheaper, especially if there were a lot more subscribers than we have now. First class is faster and provides for forwarding as […] | |
| Publisher’s Notes | The renewals continue to come in although the renewal rate (about 50%) is not fantastic as people change computers. We really appreciate the good words that many enclose. I am tempted to put more of them in the friends column, but do not like it when other magazines publish congratulatory letters so I have refrained. […] | |
| Publisher’s Notes | We have taken yet another step in the direction of computerization. Bo has started up a QZX bulletin board. QZX can now be reached by computer. Just call (505) 646-5194 and hit ENTER when you get the carrier. Follow the simple sign in instructions for the message system and leave your message for ALEX BURR […] | |
| QL Antenna Program | Calculates antenna size for specific frequencies. | Sinclair QL, Type-in program |
| QL in Europe | WA6DLI, Bob, sent me some interesting information about QL hardware and software available in Europe. It seems that there is still enough interest to support an active QL industry. The information mentioned a trade show held in Holland just for the QL. The main items which he sent me described what appeared to me to […] | Sinclair QL |
| QSL Print Program | I’ve lost track of the number of QSL printing programs we have printed so far, but each one has been a little different from the others. More importantly, each shows a creative endeavor on someone’s part. Now, how can we stifle creative endeavor and stop printing QSL programs. Ed says this is his first (?) […] | Timex/Sinclair 1000, Type-in program |
| QSL Printing Program | Here is a compact QSL printing program which may be handy in the ham-shack. It is suitable for any situation where the users call is five characters or less. Long calls such as mine will not work (which is why I had to borrow the call of our publisher for the sample). | Timex/Sinclair 1000, Type-in program |
| QSL-II Program | QSL-II is one of a series of programs comprising the KA2HLO ham helper series. The programs were designed to put the Timex/Sinclair family of computers to work in the ham shack and they serve a variety of purposes from data files to QSL printing. | Timex/Sinclair 1000, Type-in program |
| QSL-III Program | “QSL III” is one of a series of programs making up the KA2LHO ham helper series. QSL III is a QSL printing program that has been squeezed into just 1K of memory space. | Timex/Sinclair 1000, Type-in program |
| QZX | Reprint of review of the newsletter that appeared in 73 Magazine. A newsletter? How do you review a newsletter for 73? It doesn’t beep, light up, plug in, or charge your batteries. But QZX, the newsletter for hams who own Sinclair/Timex computers. does transmit. It transmits a lot of very good information, and we thought […] | |
| QZX Friends | Notes about renewals. Bill Jones is starting a T/S 2068 magazine. | |
| QZX Friends | User gets 2068 working on packet radio. | Timex/Sinclair 2068 |
| QZX Friends | Here’s your chance to let your ambitions and accomplishments be known. Feel free to let us know what you are up to, and to contact those ‘doing your thing’. | Timex/Sinclair 1000 |
| QZX Friends | Here’s your chance to let your ambitions and accomplishments be known. Feel free to let us know what you are up to, and to contact those ‘doing your thing’. | Timex/Sinclair 1000 |
| QZX Friends | Here’s your chance to let your ambitions and accomplishments be known. Feel free to let us know what you are up to, and to contact while ‘doing your thing’. | Timex/Sinclair 1000 |
| QZX Friends | Here’s your chance to let your ambitions and accomplishments be known. Feel free to let us know what you are up to, and to contact those ‘doing your thing’. | Timex/Sinclair 1000 |
| QZX Friends | Here’s your chance to let your ambitions and accomplishments be known. Feel free to let us know what you are up to, and to contact those ‘doing your thing’. W5Q0U – Jack is a new TS180 owner, one of the local gang, determined to learn about (or use) computers at the ripe age of 76. | |
| QZX Friends | Timex/Sinclair 1000 | |
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| QZX Friends | Timex/Sinclair 1000 | |
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| QZX Friends | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| QZX Friends | ||
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| QZX Friends | WA6OUC – Warren renewed, made a contribution to the postage fund, and wrote an interesting letter about his computers. He has a TS1000, three TS2068’s, and a QL on which he wrote the letter. Most of his computers have had disk drives added to them. I am trying to get Warren to write a description […] | |
| QZX Friends | WIDRD – Harry renewed and made a contribution to the postage fund. K2MI – Marty, the founder of QZX, wrote some notes on the beginnings of QZX which will appear in the next issue. He also said that he and his wife are newly retired and have done quite a bit of traveling. He recently […] | |
| QZX Friends | WA6DLI – Bob says that he has not been doing much with his QL recently. He gave his TS2068 outfit to WA6OUC, Warren, another reader. WA4BQE – Ed became the second reader to extend his subscription to 1994 when he renewed and contributed to the postage fund. W6HAI – John also renewed and contributed to […] | |
| QZX Friends | WA6DLI – Bob, one of the most prolific QZX authors, renewed and enclosed a contribution to the postage fund. He says that he is using his QL on HF packet and cw. WA6OJJ – Another Bob, whose suitcase packet station basesd on the TS1000 was described in the December 1988 issue of QZX, has become […] | |
| QZX Friends | KA5OCD – Coyt became the first reader to order an index. He also renewed and sent a contribution to the postage fund. WA4BQE – Edward also ordered an index. | |
| QZX Friends | W4EDL – Bob renewed and sent a generous contribution to the postage fund after a stay in the hospital. I am not sure of the connection, but at least he is doing well at home now. KF5GG – George renewed, ordered an index. and made a contribution to the postage fund. He also asked for […] | |
| QZX History | This issue represents the start of a second decade of publication for this version of QZX, so it is not inappropriate to write a little of the history of the publication. As many readers well know, QZX was started by K2MI, Marty Irons. He started the magazine as a very personal service to the ham […] | |
| QZX Index | The database for the definitive QZX index is done! The index itself will be ready for distribution in less than six weeks. A lot of effort has gone into this book. It is not yet done because the covers must be designed, a table of contents created, and some explanatory material written; but the end […] | |
| QZX Index | The database for the definitive QZX index is done! The index itself will be ready for distribution in less than four weeks. I still have to design the covers, create the table of contents, and stop it from printing so many blank pages when the various indices are printed. It is still expected that the […] | |
| QZX Index Completed | The ten plus year QZX index is completed and copies mailed off to all those who sent in advanced orders. It looks quite good, if I do say so myself. It is a 59 page book with heavy red covers and plastic comb binding so that the pages easily lie flat. The main part consists […] | |
| QZX Net Info | I know they are out there, but I am not copying them regularly in the Midwest. The propagation on twenty is taking its toll here. I hear it has been averaging twenty or so check-ins per session, with response as far away as Hawaii. It has good coverage not only in participation, but also in […] | |
| QZX Net Info | Tired of issues looking thru back for net times and frequencies? Maybe this new format will help. Watch out for the Zulu – wrong night confusion. suppose they will all shift one hour when DST starts. | |
| QZX Net Info | Taking a gamble that everyone shifted one hour as a result of Daylight Savings Time, I moved the net times one hour. Hope its ok. | |
| QZX Net Info | Don’t forget to send in corrections, deletions, etc. | |
| QZX Net Info | ||
| QZX Net Info | ||
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| QZX Net Report | There is still an active QZX net discussing our Sinclair computers. It meets at 10 AM Pacific local time every Saturday morning on 7235 MHz. It has not missed a session since 1981. However the number of check-ins has been going down. At one time there was a roster of 50-60 calls with about 20 […] | |
| QZX Readers | Because the subscription list for QZX is in a computer data base it is relatively easy to do a little analysis of the list. The current data base does not include everyone who has ever subscribed because a number of years ago the data base program was changed and only the current subscribers were transferred. […] | |
| RAM Extension For The QL (512K) | Here is a circuit diagram which can be used as the basis for a 512K RAM expansion for the QL. There is no printed circuit board pattern but it can be wired up rather easily on a wirewrap board. | Sinclair QL |
| Reactance/Resonance Calculator | Quickly find the values required for resonant circuits or audio filters. Also use it to easily scale existing designs for different frequencies. | Timex/Sinclair 1000, Type-in program |
| RFI to CWSS: Hints and Tips | Cliff, NU4V, has given us a super CW transceive program. The following ideas have helped me get more use from it by getting rid of unwanted interference to and from the computer. If have been tearing your hair and wondering why the system crashes in operation, take a look at these suggestions. | |
| ROM Differences in the TS1500 | Some people are a bit unsure about the way in which the TS1500 differs from its predecessors, besides the improved keyboard. I repeat here some information gleaned from previous issues of QZX, particularly the December 1983 issue, about the very minor differences in the ROM. There were only 61 bytes changed at the hex addresses […] | Timex/Sinclair 1500 |
| Roster-6 | Roster-6 allows you to create a list of callsigns and names which are automatically alphabetized according to callsign. | Timex/Sinclair 1000, Type-in program |
| RS-232 to Video – The Easy Way | With the trusty ZX81/TS1000 destined for a place in a dusty closet, here’s a way to put it to use in the event you need a video output from a device having a RS232 serial port. Two examples are the HP41C calculator/computer and Tandy’s new Model 100 portable computer. First, to give credit; Charlie Welch, […] | Timex/Sinclair 1000, Type-in program |
| RTTY Frequencies | It is sometimes hard to keep all the frequencies used in RTTY work straight. There are four main types of frequencies; word frequencies, shift frequencies, mark and space frequencies, and transceiver frequencies. The most important frequency is that at which the data is sent. The most common frequency is 60 words per minute. It is […] | |
| RTTY Literature | Most hams, unless they are already active in RTTY, will need to read up on this operating mode before they know what equipment is required to operate. One of the best sources of information is described here in some detail. and some are mentioned at the end. | |
| RTTY Send Program & Interface for the Sinclair/Timex ZX81 | One of the things in operating RTTY with non-electronic gear has been the nuisance of identifying. here is a lot or repetition such as the other station’s call, my call, my name and QTH. I often envied tnose that had the new fancy “glass TTY” units that had all of that built in. Well that […] | Timex/Sinclair 1000, Type-in program |
| SAS: Size, Accuracy, and Speed | This is the third installment of a ‘column’ in which I had hoped to enlist some (LOTS) of participation. We have not received any feedback on either program to date! To compound my problem of limited spare time, accidently erased the program tape! I hope to have it re-entered soon! Never, never forget to label […] | Timex/Sinclair 1000, Type-in program |
| Satellite | Enclosed are two prograns for satellite orbits. One is for 1K and the other requires more than that, but it gives more specific information. I work as a power plant operator (hydroelectric type). I have the ZK81 with 16K and ak looking forward to the T52000. I use mostly ICOM gear, 720A, 2KL, AT500. & […] | Timex/Sinclair 1000, Type-in program |
| Satellite Tracking | This month we finish the satellite tracking program by W6WNK as modified by WA6DLI. It was run in installments as it is quite a long program. The underlying program was distributed by AMSAT when the ZX81 was the official AMSAT computer. Bob modified the program when N6VMO, John, asked for any Timex satellite tracker so […] | Timex/Sinclair 2068, Type-in program |
| Simple Mods for ZXAS & ZXDB | The BUG-BYTE ZXAS assembler and ZXDB disassembler/debugger comprise a fairly powerful machine level programming package. In this article I will describe a few simple modifications to the BASIC portion of each program which will make them all little more convenient to use. I will also describe memory usage of the two packages and show you […] | Timex/Sinclair 1000, Type-in program |
| Simple RTTY TU Circuit | This simple RTTY terminal unit provides a TTL output that can be connected directly to the ZX81. Shown is a two position switch to allow for “inversion”. but an additional position is recommended to keep it from messing up tape loading. The LED is used as a tuning indicator and works reasonably well on 170 […] | Timex/Sinclair 1000 |
| Sinclair Computers | The Sinclair family of computers were conceived and developed by Clive Sinclair who was well known in Great Britain as a very innovative electronics kit designer. His trade mark was advanced capabilities with a reasonable price (and, unfortunately, with some. design problem which limited the utility). But his ZX80 and ZX81 kits were wildly successful […] | |
| Sinclair Puzzle | Sinclair and Timex based crossword puzzle. | |
| Sinclair Puzzle Solution | Solution to the crossword puzzle that appeared in QZX v11 n10. | |
| Size-Accuracy-Speed | I did finally find time to get a hard copy of working versions of my 3 sort routines. I haven’t had time to work on them lately and hope to do so while ‘vacationing’ in N.C; Perhaps some of you ‘novices’ (beginners) want to tackle them try to improve their size or speed. | Timex/Sinclair 1000, Type-in program |
| Some Possible Links Between the Z88 and Other Computer | Diagram showing how to connect the Z88 to other computers. | Cambridge Z88 |
| Superduper | Here’s a nice program to keep track of your contest contacts to avoid contacts with dopes, or is it dupes? It’s complete with comments and note the neat credit line at the end. | Timex/Sinclair 1000, Type-in program |
| Telecommunications on the QL | Short program to send CTRL-C, discussion of British ham radio software. | Sinclair QL, Type-in program |
| Text Edit | This is a simple routine that I find very useful. I currently have it as part of my QSL program so as to include a personal message. | Timex/Sinclair 1000, Type-in program |
| The Basic RTTY Station | A block diagram for a basic RTTY computer controlled station would look like the following diagram. | |
| The Future of QZX | Postal rates going up, subscribers decreasing. | |
| The Future of QZX | The letter from KQ2F, printed on the previous page, sums up the feelings and actions of many QZX readers. As Bob mentions, he has been a QZX reader from the start. Most of our readers have been with us for four or more years, and many of them have bought computers with other operating systems. […] | |
| The G4IDE RTTY Terminal Unit | This terminal unit was, of course, designed to be used with my ZX81 RTTY program. However it is equally suitable for use with any micro-computer with a TTL compatible I/O port. | Timex/Sinclair 1000, Type-in program |
| The New TS1500 ROM | The ROM in the new TS1500 is slightly different from that in the old TS100. Sixty-one bytes have been changed at the following hex addresses: 0002-0004; 0006; 0362; 03C6-0401; 16BC; 18D0. | Timex/Sinclair 1500 |
| The T/S 1000 on Packet | Discusses converting the TS 2050 modem to an RS-242 port for use with ZTX80 terminal program (from Fred Nachbaur) to do packet radio. | Timex/Sinclair 1000 |
| Timex Out of Market | Timex Computer Corporation announced February 22 that they were withdrawing from the home computer market. The announcement was a big blow to those who have worked hard to support their fine computers. Presumably the reason for the withdrawal was that the company figured that they could not make enough money under the present circumstances. Timex […] | |
| Timex Story | A few days ago (July 1993) WAILOU, Stan Horzepa, the QST columnist, sent me two articles from his local newspaper based on interviews from ex-Timex employees who offered various reasons why Timex withdrew from the computer business. One of the reasons Stan is interested in our computers, aside from his collection of QZX issues, is […] | |
| Tips on ZX81/TS1000 Computer Repair | The following is a brief record, based on practical experience, of what kinds of things go wrong with the ZX81 and TS1000 computers and how to go about recognizing and fixing them. Your first clue as to what’s wrong is indicated by what does or does not come up on the screen. If nothing comes […] | Timex/Sinclair 1000 |
| TS-2068 ATV Program | Program to display a ham’s call sign for amateur television. | Timex/Sinclair 2068, Type-in program |
| TS1000 Controls 38,000 Volts | The government power company in the province of Mendoza, Argentina (EMSS) had a big problem. They had to develope a remote and automatic system for the management of power transformer stations in remote areas outside urban sites in places which were difficult to access. The system which was developed is based on TS1000 boards with […] | Timex/Sinclair 1000 |
| TS2068 64 Column Display | One of the really nice features of the new Timex TS2068 is its 64 column mode. But it is not as simple as turning a switch. As you probably know, when you use the wide mode, the computer opens a second display file with a starting address of 24576. Prior to the second display file […] | Timex/Sinclair 2068, Type-in program |
| TS2068 Antenna Design Program | Terry said I was a bit hasty in my initial impression of the TS2868, so I am enclosing this preview of an article he is working on, to get even with him! Now he has to stay busy and finish it. I admit I was wrong about the 2068, everyone I have talked to loves […] | Timex/Sinclair 2068 |
| TS2068 Functional Diagrams | Timex/Sinclair 2068 | |
| TS2068 ROM to EPROM | One of the ways in which a TS2068 can be put to use in an unconventional manner is to replace the internal ROM chips with EPROM chips containing the program for the custom application. There are two of these ROM chips in the TS2068. The first figure shows where in the 64K byte address space […] | Timex/Sinclair 2068 |
| TS2068 Tape Formats | Tape I/O is done via Port OFEH. An I/O read of Port OFEH pulls in the cassette input on Bit 6. An I/O write of Port OFEH Bit 3 controls the tape output with Bit 3 = 1 genrating a high output and Bit 3 = 0 generating a low output. | Timex/Sinclair 2068 |
| USA-CA Program | Program for tracking contacts with other hams in the US and Canada. | Timex/Sinclair 1000, Type-in program |
| USA-CA Totals Program | “USACA TOTALS” is one of a series of programs making up the KA2LHO ham helper series. “USA TOTALS” is a sister program to the “USACA” series. | Timex/Sinclair 1000, Type-in program |
| Using Z-XLR8 with 32K | Having several large programs requiring 16K or more of RAM, I was very interested in the Z-XLR8 fast LOAD/SAVE program advertised in QZX. I sent Advanced Interface Designs a check and promptly received the cassette version. | Timex/Sinclair 1000 |
| UTC | “UTC” is one of a series of programs making up the KA2LHO ham helper series. UTC can be used on its own as a UTC time converter or as a subroutine in a larger program. | Timex/Sinclair 1000, Type-in program |
| Vendors | Here is a list of vendors who are more or less active in selling Sinclair equipment, software or services. The list is presented as a service to the reader. It is difficult to keep up with the activities of vendors because their interests (and stock) are continually changing; however I have seen some indication of […] | |
| Vendors | Here is a list of vendors who are more or less active in selling Sinclair equipment, software or services. The list is presented as a service to the reader. It is difficult to keep up with the activities of vendors because their interests (and stock) are continually changing. Therefore I have put a date code […] | |
| Vendors | Here is a list of vendors who are more or less active in selling Sinclair equipment, software or services. The list is presented as a service to the reader. It is difficult to keep up with the activities of vendors because their interests (and stock) are continually changing. Therefore I have put a date code […] | |
| Votrax Speech Synthesizer | Here is a ‘term paper’ written by one of my students who tackled the job of interfacing the Votrax SC-01A chip to his TS1000. He is presently working on a nice ‘menu driven’ program, similar to that described for the Parrot, which will give him a lot more versatility. | Timex/Sinclair 1000, Type-in program |
| Wavelength/Freq Program | Wavelength to frequency conversion. | Timex/Sinclair 1000, Type-in program |
| Worked All States | This 16K program, written in Timex/Sinclair BASIC, provides a convenient way to store data related to the ARRL Worked All States awards. It is self prompting and should be easy to use no matter how long since the last update. It tracks contacts, QSLs sent and QSLs received for the 50 states for SSB, CW […] | Timex/Sinclair 1000, Type-in program |
| ZX81 16K Byte RAM | The circuit on page 4 is for a 16K byte RAM extension board to plug onto the ZX81’s rear connector. Connecting the board disables the ZX81’s internal 1K RAM, but it is compatible with the Pseudo ROM and 24 line I/O circuits given earlier. 4116 dynamic RAM ICs have been used for low cost, but […] | Timex/Sinclair 1000 |
| ZX81 Baudot Interface | Here’s a nice article telling how to interface an ol’ Teletype machine to the Sinclair. Be sure to follow his tips on using an optocoupler, the voltages in a teletype would fry the Sinclair! | Timex/Sinclair 1000, Type-in program |
| ZX81 Block Diagram | Sinclair ZX81 | |
| ZX81 Graphics Template | The next page is a handy graphics template for the ZX81, TS1000, and TS1500. It will be useful when you are designing QSL cards where you want to get your call in large letters or even when you want to print a circuit diagram containing symbols for resistors and capacitors. In fact some reader might […] | Timex/Sinclair 1000 |
| ZX81 Keyboard and Power Supply | Sinclair ZX81 | |
| ZX81 RTTY Receive Program | Here’s a neat RTTY program receives that RTTY for you. The author interfaced his ZX-81 directly to his home made TU. (I’m assuming TTL signals). He connected his TU to pin 20 of IC1 in the ZX81. It is for a 16K machine. This short RTTY receive program overcomes some of the like timing problems […] | Timex/Sinclair 1000, Type-in program |
| ZX81 RTTY Transmit/Receive Program & Interface | Here is a nice RTTY transmit and receive program with the required hardware interface. | Timex/Sinclair 1000, Type-in program |
Last updated: January 16, 2026