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Ultra Twin R656

Ultra Twin R656; Ultra Electric Ltd.; (ID = 253100) Radio Ultra Twin R656; Ultra Electric Ltd.; (ID = 1217022) Radio
Ultra Twin R656; Ultra Electric Ltd.; (ID = 1217023) Radio Ultra Twin R656; Ultra Electric Ltd.; (ID = 1217024) Radio
Ultra Twin R656; Ultra Electric Ltd.; (ID = 1217250) Radio Ultra Twin R656; Ultra Electric Ltd.; (ID = 1275190) Radio
Ultra Twin R656; Ultra Electric Ltd.; (ID = 1275191) Radio
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Ultra Twin R656; Ultra Electric Ltd.; (ID = 253100) Radio
Ultra Electric Ltd.;: Ultra Twin R656 [Radio] ID = 253100 933x699
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For model Ultra Twin R656, Ultra Electric Ltd.; London
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Ultra Electric Ltd.; London
alternative name
 
Ultra Radio and Television
Year: 1950 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: 1C1 1F3 1FD9 1P11
Main principle Super-Heterodyne (Super in general); ZF/IF 470 kHz
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Line / Batteries (any type) / 200-214; 215-234; 235-250 / 7,5 & 85 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
Power out
from Radiomuseum.org Model: Ultra Twin R656 - Ultra Electric Ltd.; London
Material Moulded (Bakelite or Plastics)
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 12 x 8.5 x 6.5 inch / 305 x 216 x 165 mm
Notes

Uses an S.T.C DRM 2B as rectifier.
Rear panel has an external aerial socket.

A lever on a spring loaded slide switch locks the radio in the "battery" mode when the mains plug is parked in a holder. This was to suit a UK 5A two pin and some smaller 5A 3 pin prior to the 3 rectangular pin system adopted in the late 1950s. The chassis is also connected directly to one wire of the mains cable when in "mains" mode (default) and power switch on. Today the set is best operated via an external isolation transformer or on batteries.
There is an external aerial socket isolated by a Silver Mica capacitor.

This Twin uses separate batteries (Presume B129 and AD39 as claimed by trader 963 for Twin 50). A  B126 + AD38 will physically connect, but B126 is 90V and the label clearly states 85V. A B129 and AD39 fit snugly.

If the radio has one battery plug, then it's the Twin 50 R568 or some other Twin as  R&TS states this uses a combined battery. Presumed to be B127 (size & rating and claimed by Trader 963).

Price in first year of sale 236.00 Hfl
Source of data Technisch- Commercieel - Radio Vademecum Staleman

Model page created by John Koster. See "Data change" for further contributors.



All listed radios etc. from Ultra Electric Ltd.; London
Here you find 217 models, 121 with images and 149 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.





  
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