QZX

Publisher: QZX

QZX was a newsletter for people with a combined interest in amateur radio and the Sinclairโ€”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 300 copies per issue in the early 1980s. By 1987, circulation was at 100 copies per issue.

QZX was published by Alex Burr.

Articles

  • (1000) 232 = 2050
    Converting the TS 2050 to work as a RTTY modem.
  • A Simple Morse Decoder for the QL
    Program to decode morse off the network port.
  • A Z80 machine language program to use the ZX81 as an audio frequency counter
  • 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.
  • 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.
  • 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
  • Phased Vertical Antennas
    A Sinclair BASIC program to print radiation pattern plots for phased vertical antenna arrays.
  • Publisher's Notes
    Quantum Computing going out of business; American QLs being sold in England.
  • Publisher's Notes
  • QL Antenna Program
    Calculates antenna size for specific frequencies.
  • QZX Friends
    Notes about renewals. Bill Jones is starting a T/S 2068 magazine.
  • QZX Friends
    User gets 2068 working on packet radio.
  • Telecommunications on the QL
    Short program to send CTRL-C, discussion of British ham radio software.
  • The Future of QZX
    Postal rates going up, subscribers decreasing.
  • 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.
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