A long time since looking at such a radio
to check-over/repair as no known history and not powered up in any way
http://home.graffiti.net/diverse:graffiti.net/cr280.jpg
Took apart section by section with bits in separate labelled bags
I will test the valves later today
ECH42, EF41, EBC41,EL42
Seems surprisingly good condition inside. Will have to replace the 12V (-ve
supply) lead and speaker lead as perished and the on/off switch is ohmic.
The vibrator had obviously been removed at some point (putty-stuff is split)
in the past. what to look out for when testing these and how to remove that
putty-like goo if necessary, warming with hot-air?. I assume test with load
attached but what to do if a problem within the vibrator.?

What ohmage speaker? 2.5, 3 or 4 ohm ?
Could measure primary R of the output matcher more accurately if any help
but primary 692 ohm and secondary between 0.1 and 0.2 ohm

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/