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FERNSEH · 19th May 2018, 11:09 pm

"Nice procedures David but does it produce any EHT! I am gagging for an answer." John.
Hi John,
'fraid not. It's most likely the line output transformer is faulty. No trace of a spark at the anode of the EY51 EHT rectifier valve.
The PL81 is passing excess current and that's likely the reason why the 250mA timebase fuse was found to be blown.
The scan coils have been disconnected because back in the old days along with the line output transformer the coils were another source of trouble in the V4, VT4 and CTM4.

DFWB.

19th May 2018, 11:09 pm	#20
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Pye CTM4. "Nice procedures David but does it produce any EHT! I am gagging for an answer." John. Hi John, 'fraid not. It's most likely the line output transformer is faulty. No trace of a spark at the anode of the EY51 EHT rectifier valve. The PL81 is passing excess current and that's likely the reason why the 250mA timebase fuse was found to be blown. The scan coils have been disconnected because back in the old days along with the line output transformer the coils were another source of trouble in the V4, VT4 and CTM4. DFWB.