Note
HA-202 1973-1977 $64.95
HA-202A 1978-1984 $69.95
The HA-202 was designed and sold primarily for mobile operation but works equally well in fixed station use. It will cover any 1.5 MHz portion of the band between 143 and 149 MHz. A pair of 2N5591 transistors in push-pull will withstand up to 3:1 SWR and depend upon a big heat sink to keep them cool instead of “exotic sensing circuitry.” Tuned input/output is 50Ω nominal. The HA-202(A) tunes up with a VTVM or SWR bridge, a dummy load, and a broadcast band receiver (to listen for oscillations).
The A version was a major redesign that reduced the possibility of instability, simplified tune-up, and replaced the RCA type connectors with SO-239s.
Both versions work very well and are easy to fix. Anodized black in color.
Caution: Do not exceed 16 volts input.
References:
Review. QST. Aug 1973, p. 52.
Review. CQ. Jul 1975, p. 51.
Use on 220 MHz. 73 Amateur Radio. Oct 1981, p. 48.
Frequency range: 143 to 149 MHz (any 1.5 MHz segment)
Power output: see chart
Power input: 5 to 15 watts FM
Input/output impedance: 50 Ω
Input VSWR: 1.5:1 maximum
Maximum stable VSWR: 3:1
Harmonic and spurious radiation:
HA-202: not specified
HA-202A: –60 db or better
Operating temperature range: –30 F to + 140 F
Power requirements: 12 to 16 VDC, 7 amps maximum, negative ground; 1 mA standby
Photos, general information and specifications from "Heathkit: A Guide to the Amateur Radio Products," by Chuck Penson, WA7ZZE. Used with permission.
