QZX
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 |
| (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 |
| A Simple Morse Decoder for the QL | Program to decode morse off the network port. | Sinclair QL |
| A Z80 machine language program to use the ZX81 as an audio frequency counter | Sinclair ZX81, Timex/Sinclair 1000 | |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 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 | |
| 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 |
| 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 |
| 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 |
| 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 |
| Loaded Dipole Design Program | Program for calculating the loading coil value required for dipole antennas. | Timex/Sinclair 1000 |
| Loaded Dipole Design Program | Here’s the documentation and typical print outs for this program which appeared in the last issue. | Timex/Sinclair 1000 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Net Roster Program | Here’s an updated and readable version of the program that appeared in the February 1983 issue. | 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 |
| Phased Vertical Antennas | A Sinclair BASIC program to print radiation pattern plots for phased vertical antenna arrays. | Timex/Sinclair 1000 |
| 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 |
| 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 |
| 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 | |
| QL Antenna Program | Calculates antenna size for specific frequencies. | Sinclair QL |
| 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 |
| 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 | |
| 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 | ||
| 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 |
| Roster-6 | Roster-6 allows you to create a list of callsigns and names which are automatically alphabetized according to callsign. | Timex/Sinclair 1000 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Telecommunications on the QL | Short program to send CTRL-C, discussion of British ham radio software. | Sinclair QL |
| 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 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 |
| 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 |
| 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 |
| 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 |
| Wavelength/Freq Program | Wavelength to frequency conversion. | Timex/Sinclair 1000 |
| 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 |
| 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 |
| ZX81 RTTY Transmit/Receive Program & Interface | Here is a nice RTTY transmit and receive program with the required hardware interface. | Timex/Sinclair 1000 |
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