- Country
- Great Britain (UK)
- Manufacturer / Brand
- Murphy Radio Ltd.; Welwyn Garden City
- Year
- 1935
- Category
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
- 193125
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- 5
- Main principle
- Superheterodyne (common); ZF/IF 117 kHz
- Wave bands
- Broadcast (MW) and Long Wave.
- Power type and voltage
- Storage and/or dry batteries / 2 & 10.5 & 133 Volt
- Loudspeaker
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
- Material
- Wooden case
- from Radiomuseum.org
- Model: B25 - Murphy Radio Ltd.; Welwyn
- Shape
- Tablemodel, high profile (upright - NOT Cathedral nor decorative).
- Notes
-
5-valve battery-powered superhet.
Similar to the Murphy B24 model. See B24 & B25 Receivers Technical Notes, 3rd Ed. page 19.
Special filters: -
The aerial is coupled to the grid of V1 by a bandpass tuning circuit which also incorporates an image frequency suppression circuit (whistle suppressor). Additionally in the anode circuit of V4 is a heterodyne filter with a very sharp cut-off.
- Price in first year of sale
- 13.00 GBP
- Literature/Schematics (1)
- Trader sheet 516
- Literature/Schematics (2)
- - - Manufacturers Literature (B24 & B25 Receivers Technical Notes, 3rd Ed.)
- Author
- Model page created by Howard Craven. See "Data change" for further contributors.
- Other Models
-
Here you find 366 models, 299 with images and 234 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Murphy Radio Ltd.; Welwyn Garden City