Digital Only Airadio Models TRA1A TRA1B TRA1C SU-41D SU41D
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Airadio Transmitter & Receivers

airadio_model_tra1a_sams_photofact_schematic
TRADE NAME Airadio, Models TRA-1A (6 Volts), TRA-1B (12 Volts), TRA-1C (24 Volts)
MANUFACTURER Airadio, Inc., Melrose Ave. and Barryplace, Stamford, Conn.
TYPE SET Battery Operated Aircraft Single Channel Crystal Controlled Transmitter
TUBES (6 Volt Model)  7C5 Crystal-Osc., 7C5 Modulator, 7C5 Power Amp.
            (12 & 24 Volt Models) 14C5 Crystal-Osc. 7C5 Modulator, 14C5 Power Amplifier
POWER SUPPLY 6, 12 or 24 Volt Storage Battery
RATING Transmit Pos. 5.4 Amp. @ 12.6 Volts DC, Receive Pos. 3 Amp. @ 12.6 Volts DC 
OPERATING FREQUENCY 3105 KC
Sams Photofact Set 13 Folder 1 Airadio Models TRA1A TRA1B TRA1C  4 Pages
airadio_model_su52a_sams_photofact_schematic
TRADE NAME Airadio, Models SU-52A (6 Volt), SU-52B (12 Volt), SU-52C (24 Volt)
MANUFACTURER Airadio, Inc., Melrose Ave. and Barryplace, Stamford, Conn.
TYPE SET Battery Operated Aircraft 2 Band Superheterodyne Receiver
TUBES (6 Volt Model) 7A7 RF Amp., 7Q7 Converter, 7A7 IF Amp., 7B6 Det.-AVC-AF
7A4 Power Output (12 & 24 Volt Models) 14A7 RF Amp., 7Q7 Converter, 7A7 IF Amp.
14B6 Det.-AVC-AF, 14A4 Power Output 
POWER SUPPLY 6, 12 or 24 Volt Storage Battery
RATING "A" Supply 750 MA @ 12.6 Volts DC - "B" Drain 24 MA @ 345 Volts DC
TUNING RANGE 195-420 KC & 550-1600 KC
Sams Photofact Set 13 Folder 2 Airadio SU52A SU52B SU52C 4 Pages
airadio_model_su41d_sams_photofact_schematic
TRADE NAME Airadio Model SU-41D- "The Super "41" 
MANUFACTURER Airadio, Inc., Melrose Ave. and Barryplace, Stamford, Conn.
TYPE SET Battery Operated Superheterodyne Aircraft Receiver
TUBES 1LN5 RF Amp., 1LA6 Converter, 1LN5 IF Amp., 1LH4 Det. -AVC-AF, 1LB4 Power Output
POWER SUPPLY 1.5 Volts "A" Supply & 90 Volts "B" Supply in Battery Pack Form
RATING 250 MA @ 1.5 Volts DC and 10.3 MA @ 86 Volts DC
TUNING RANGE 195-420 KC 
Sams Photofact Set 11 Folder 1 Airadio Model SU-41D SU41D 4 Pages