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257

257; Marconi Co. (ID = 355328) Radio
 
257; Marconi Co. (ID = 1031014) Radio
 
257; Marconi Co. (ID = 1031015) Radio
 
257; Marconi Co. (ID = 1031016) Radio
257; Marconi Co. (ID = 2445213) Radio 257; Marconi Co. (ID = 284494) Radio
257; Marconi Co. (ID = 284495) Radio 257; Marconi Co. (ID = 284496) Radio
257; Marconi Co. (ID = 284497) Radio
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257; Marconi Co. (ID = 2445213) Radio
Marconi Co.: 257 [Radio] ID = 2445213 1375x1024
Select picture or schematic to display from thumbnails on the right and click for download.
For model 257, Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
Year: 1934 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: X21 VS24 HD21 QP21
Main principle Superheterodyne (common); ZF/IF 456 kHz
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Storage and/or dry batteries / 2 & 9 & 166 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Radiomuseum.org Model: 257 - Marconi Co. Marconiphone,
Material Wooden case
Shape Tablemodel, high profile (upright - NOT Cathedral nor decorative).
Notes The chassis is the same as that in the HMV 146 and similar to that in the later Marconiphone 234 model.
Literature/Schematics (1) Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) (143)
Literature/Schematics (2) Trader Service Sheet (suppl. of Wireless & El. Trader, etc.) (650)

Model page created by Peter Hoddow. See "Data change" for further contributors.



All listed radios etc. from Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
Here you find 484 models, 300 with images and 311 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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