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doublet 56427

Country:  United States of America (USA)
Manufacturer / Brand:  Sears, Roebuck & Co.; Chicago (IL)
Year: 9999 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 8: 1D5GP 1C7G 1D5GP 1D5GP 1H6G 1H4G 1H4G 4A6G
Main principle Superhet with RF-stage; ZF/IF 465 kHz
Tuned circuits 8 AM circuit(s)
Wave bands Broadcast, Short Wave(s) and Police.
Power type and voltage Storage and/or dry batteries / 90 & 4 or 4.5 & 3 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6 inch = 15.2 cm
Power out 0.9 W (unknown quality)
from Model: doublet 56427 - Sears, Roebuck & Co.; Chicago

Speaker 6 or 8 inch. Presence of Bias cells.

External source of data Ernst Erb
Circuit diagram reference Rider's Perpetual, Volume 10 = 1939 and before
Literature/Schematics (1) Riders 10-3, 4

All listed radios etc. from Sears, Roebuck & Co.; Chicago (IL)
Here you find 5102 models, 3092 with images and 3664 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.