Marconiphone "Personal K12" P20B
- Great Britain (UK)
- Manufacturer / Brand
- Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)
- Broadcast Receiver - or past WW2 Tuner
- Radiomuseum.org ID
Click on the schematic thumbnail to request the schematic as a free document.
- Number of Tubes
- Main principle
- Superheterodyne (common); ZF/IF 365 kHz
- Wave bands
- Broadcast (MW) and Long Wave.
- Power type and voltage
- Dry Batteries / 1.5 & 69 Volt
- Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7.5 cm = 3 inch
- Power out
- 0.08 W (unknown quality)
- Various materials
- from Radiomuseum.org
- Model: Marconiphone "Personal K12" P20B - Marconi Co. Marconiphone,
- Very small Portable or Pocket-Set (Handheld) < 8 inch.
- Dimensions (WHD)
- 7 x 3 x 5 inch / 178 x 76 x 127 mm
Uses a B114 combination battery pack for about 30 hours operation (assuming F cell internally for LT, HT was Layer type cells).. HT 8mA and LT 250mA (approximately).
The Marconiphone P20B is a "Personal" Miniature Portable, also named K12. "Snakeskin" effect covered cast metal body with cream plastic base & lid. Lift-up lid switches radio on when opened. Cream painted metal front panel.
LW 1000 ... 2000 m
MW 200 ... 550 m
It's based on the P17B design (MW only) with addition of LW by addition of a loading coil for the loop aerial and switching at the Local oscillator coil.
The P20BX is the "export" version
- Net weight (2.2 lb = 1 kg)
- 1.8 kg / 3 lb 15.4 oz (3.965 lb)
- Price in first year of sale
- 11.00 £
- External source of data
- Radios von gestern, page 90
- Source of data
- Radio! Radio!
- Mentioned in
- Funk-Technik (FT) (1951/4 S134)
- Literature/Schematics (2)
- Radio And Television Servicing books (R&TVS) (1951 Ed., Vol I, Pg. 418)
- Literature/Schematics (3)
- Attaché Radios, Mark Johnson 2005, BVWS GB
- Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.
- Other Models
Here you find 490 models, 313 with images and 313 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Marconi Co. (Marconiphone, Marconi's Wireless Telegraph Co. Ltd.), GB (not tubes - see also HMV His Master's Voice)