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Marconiphone "Personal K12" P20B

Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 533762) Radio
 
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 533763) Radio
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 2084374) Radio Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 423901) Radio
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 111189) Radio Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 111187) Radio
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 111188) Radio Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 111190) Radio
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 152548) Radio Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 978334) Radio
Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 978335) Radio Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 978336) Radio
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Marconiphone 'Personal K12' P20B; Marconi Co. (ID = 2084374) Radio
Marconi Co.: Marconiphone "Personal K12" P20B [Radio] ID = 2084374 800x600
Select picture or schematic to display from thumbnails on the right and click for download.
For model Marconiphone "Personal K12" P20B, 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: 1948 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: X17 W17 ZD17 N17
Main principle Super-Heterodyne (Super in general); ZF/IF 365 kHz
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Dry Batteries / 1.5 & 69 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 7.5 cm = 3 inch
Power out 0.08 W (unknown quality)
from Radiomuseum.org Model: Marconiphone "Personal K12" P20B - Marconi Co. Marconiphone,
Material Various materials
Shape Very small Portable or Pocket-Set (Handheld) < 8 inch.
Dimensions (WHD) 7 x 3 x 5 inch / 178 x 76 x 127 mm
Notes

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 £
Collectors' prices  
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.



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 471 models, 285 with images and 307 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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