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C139B Ch= 518B

Country:  Australia
Manufacturer / Brand:  Columbia Gramophone (Aust.) Pty. Ltd.; Sydney
Year: 1939 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: 1C7G 1F7G 1F7G 1H4G 1J6G
Main principle Superheterodyne (common); ZF/IF 460 kHz; 3 AF stage(s); Reflex
Tuned circuits 8 AM circuit(s)
Wave bands Broadcast only (MW).
Power type and voltage Storage and/or dry batteries / 135 & 90 & 2 & -4.5 & -9 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 6.5 inch = 16.5 cm
Power out
from Model: C139B Ch= 518B - Columbia Gramophone Aust. Pty.
Shape Tablemodel, with any shape - general.
Notes This radio has the same chassis as the HMV model 21. The 2nd 1F7G is reflexed as the 2nd I.F. amplifier and the 1st A.F. amplifier.
Literature/Schematics (1) Radio & Electrical Retailer, Australia (14/5/42 P18 Also in Mingay's Radio Diagram & I.F. Index)

Model page created by Stuart Irwin. See "Data change" for further contributors.

All listed radios etc. from Columbia Gramophone (Aust.) Pty. Ltd.; Sydney
Here you find 6 models, 1 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.