Defiant M900

Defiant M900; Co-operative (ID = 722242) Radio Defiant M900; Co-operative (ID = 187288) Radio
Defiant M900; Co-operative (ID = 187290) Radio Defiant M900; Co-operative (ID = 187289) Radio
Defiant M900; Co-operative (ID = 187291) Radio
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Defiant M900; Co-operative (ID = 722242) Radio
Co-operative: Defiant M900 [Radio] ID = 722242 640x623
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For model Defiant M900, Co-operative Wholesale Society (CWS) - Defiant; Manchester
Country:  Great Britain (UK)
Manufacturer / Brand:  Co-operative Wholesale Society (CWS) - Defiant; Manchester
Year: 1935 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 4: AC/VP1 AC/S2 AC2/Pen UU3
Main principle TRF (Tuned-Radio-Frequency but use of regeneration unknown)
Wave bands Broadcast (MW) and Long Wave.
Power type and voltage Alternating Current supply (AC)
Loudspeaker -Loudspeaker incorporated, but system not known.
Power out
from Model: Defiant M900 - Co-operative Wholesale Society
Material Bakelite case
Shape Design Radio or Novelty / Gadget - fancy or unusual shape.
Dimensions (WHD) 13 x 12.5 x 7.75 inch / 330 x 318 x 197 mm
Notes Brown Bakelite. Unusual shape. Chassis made by Plessey.
Source of data Radio! Radio!
Literature/Schematics (1) -- Original-techn. papers.

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

All listed radios etc. from Co-operative Wholesale Society (CWS) - Defiant; Manchester
Here you find 101 models, 47 with images and 62 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


Forum contributions about this model
Co-operative: Defiant M900
Threads: 1 | Posts: 1
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co-op: M900 (M 900); Defiant
Simon Vaughan

This is a Straight 4 valve receiver with energised loudspeaker

The Valve line-up for this set is

AC/VP1 Met (Mazda)
AC/S2 PEN Met (Mazda) or SP4B Met (mullard) alternative added from 20/09/35
AC/2 Pen Clear (Mazda)
UU4  Clear (Mullard)

Hope this information taken from a Co-Op service bulletin helps

Co-operative: Defiant M900
End of forum contributions about this model