Heathkit HW-22 40-Meter SSB Transceiver RF Input: 200 watts PEP Tubes: Fourteen tube heterodyne circuit 3 - 6EA8 mic. amp., VOX relay amp., IF amp., RF amp., Rcvr. mixer 5 - 6AU6 VFO, VOX amp., IF amps., Xmtr. mixer 1 - 6BE6 Het. osc. and mixer 1 - 12BY7 Driver 1 - 12AU7 Xtal osc., product det. 1 - 6EB8 Audio amp. and output 2 - 6GE5 R.F. output Sideband Generation: Crystal lattice bandpass filter method Stability: 100 cps overall after warm-up Carrier & Unwanted Sideband Suppression: 45 db Frequency Coverage: HW-12, 3.8-4.0 mc; HW-22, 7.2-7.3 mc; HW-32, 14.2-14.35 mc Receiver Sensitivity: 1 uv for 15 db S+N/N ratio Receiver Selectivity: 2.1 kc @ 6 db, 6.0 kc @ 50 db Output: 50 ohm fixed (unbalanced) Operation: LSB Audio output: 1 watt @ 8 ohms Mike Input: Hi-Z Panel Controls: Frequency, final tune, function (OFF-PTT-VOX-TUNE), RF gain, AF gain, (pull for crystal calibration), VOX gain, meter, Front panel screwdriver adjust for S-meter and VOX delay Rear Panel Controls: Mike gain, tune level, final bias Power requirements: 800 VDC @ 250 MA peak, 250 VDC @ 100 MA, -125 VDC @ 5 MA, 12 VAC or VDC @ 3.75 amperes Cabinet Dimensions: 6" h x 12" w x 10" d