16-05-2018, 09:00 PM
Testing the CTM4. Found two PY82 HT rectifiers diodes and fitted the correct valves in the tuner. Quite a few problems with the heater chain not helped much because some wires in the chain had been snipped off.
Been using a RS components RS14 digital multi-meter for fault finding, its a rather disappointing instrument but for £24 what can you expect?
Also there is evidence of some creative '50s and 60s servicing solutions to sort out.
A suitable elliptical loudspeaker has been found, a slightly smaller replacement for the original 7 X 4" 'speaker.
Hi Terry,
It's most likely the CRT was replaced sometime in 1957 or 58. It's unlikely anyone would have a new Mullard CR tube fitted in this set in 1967 or 68.
Geordie McBoyne.
Been using a RS components RS14 digital multi-meter for fault finding, its a rather disappointing instrument but for £24 what can you expect?
Also there is evidence of some creative '50s and 60s servicing solutions to sort out.
A suitable elliptical loudspeaker has been found, a slightly smaller replacement for the original 7 X 4" 'speaker.
Hi Terry,
It's most likely the CRT was replaced sometime in 1957 or 58. It's unlikely anyone would have a new Mullard CR tube fitted in this set in 1967 or 68.
Geordie McBoyne.
