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HI-Q-31 ; Hammarlund-Roberts, (ID = 427011) Radio
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HI-Q-31 ; Hammarlund-Roberts, (ID = 427011) Radio
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Country:  United States of America (USA)
Manufacturer / Brand:  Hammarlund-Roberts, Inc., 1182 Broadway, New York, NY
Year: 1930 ?? Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: 24 24 24 24 27 45 45 unknown_Tube
Main principle TRF without regeneration; 2 AF stage(s)
Tuned circuits 6 AM circuit(s)
Wave bands Broadcast only (MW).
Details Record Player (perh.Changer)
Power type and voltage Alternating Current supply (AC) / 90; 110 Volt
Loudspeaker Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
Power out
from Model: HI-Q-31 - Hammarlund-Roberts, Inc., 1182
Notes Push-pull audio amplifier.
External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 1 = 1931/1934 (for 1919-1931)

All listed radios etc. from Hammarlund-Roberts, Inc., 1182 Broadway, New York, NY
Here you find 11 models, 4 with images and 8 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.