Heathkit HR-20 SSB Mobile Receiver

Frequency range: 80 thru 10 meters in 5 bands
        3.5 to 4.0
        7.0 to 7.3
        14.0 to 14.36
        21.0 to 21.5
        28.0 to 29.7

Intermediate frequency filter: Center frequency, 3.0 MC; Bandwidth at -6 db, 3.0 KC; Bandwidth at -60 db, 10.0 KC Max.
Hermetically sealed

Panel controls: Sideband Select
                R.F. gain
                A.F. gain-Offf-On
                Noise Limiter
                AVC select
                Main tuning
                Band switch
                Antenna trimmer
                SSB, CW-AM switch

Signal-to-noise ratio: 10 db at 1 microvolt or less

Tubes: 1 - 6BZ6 R.F. amp
       1 - 6EA8 mixer oscillator
       1 - 6BZ6 1st I.F. amp
       1 - 6EA8 2nd I.F. amp/S meter amp
       1 - 6BE6 product detector-BFO
       1 - 6BJ7 AM detector-noise limiter-AVC
       1 - 6BE8 2st audio-audio output
       1 - 0A2  voltage regulator

Output impedance: 8 ohms and 500 ohms

Power requirements: 6.3 or 12.6 volts 4 amps AC or DC, 300 volts DC at 120MA

Cabinet size: 6¼" h x 12¼" w x 9¾" d