Frequency range: HW12A: 3.8 - 4MHz; HW22A: 7.2 - 7.3MHz; HW32A: 14.2 - 14.35MHz (a bit of 20!).
Operating modes: USB, LSB
Tx output: 200 W PEP into 50ohms unbalanced fixed.
Sideband generation: Crystal lattice band pass filter.(2.3 MHz).
Mic input: Hi-Z.
Rx sensitivity: 1(V for 15db(S+N)/N ratio.
Stability: 200 Hz per hour
Audio output:1 watt into 8 ohms
Power requirements: +800V @ 250 mA, +250V @ 100mA, -130V @ 5mA, +12V @ 3.75A.
Tube compliment: 14 tube heterodyne circuit using:
3x 6EA8 mic amp, vox amp, IF amp, RF amp, Rx mix.
1x 12AT7 Xtal osc/prod det
5x 6AU6 VFO, vox, IF amps, Tx mix
1x 6EB8 Audio amp and output.
1x 6BE6 VFO isolator 2x 6GE5 RF output
1x 12BY7 Driver
Notes: An interesting series of mono band "economy" SSB Transceiver Kits from Heathkit. Not as sturdy as the DX100/40 etc. or even the SB204 series of SSB separates, they must really be regarded as "toys", not exactly suitable for serious operating although they might have been OK for mobile as they were intended. I have not seen many examples survive through the years, although my HW32A (illustrated) is in mint condition, having been stored away in a box since it was built but un-tested in 67/8.