257
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Marconi Co.: 257 [Radio] ID = 2445213 1375x1024
Select picture or schematic to display from thumbnails on the right and click for download.
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| Year: 1934 | Category: Broadcast Receiver - or past WW2 Tuner | ||||
| Valves / Tubes | 4: X21 VS24 HD21 QP21 |
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| Main principle | Superheterodyne (common); ZF/IF 456 kHz |
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| 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 486 models, 305 with images and 312 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
