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Heatercathodeshort · 6th Feb 2018, 10:30 am

There may be a leak between sections of the smoothing cap. The value you have will be fine. Testing these large capacitors can be misleading.

The PL81 line output valve [not used in the GEC] used to exhibit a similar line but this time it was vertical to the left of the raster. They produced what appeared to be a mini ion trap magnet that fitted snugly around the valve envelope.

OK David, yes I know. I should have paid more attention to spelling at school.

Regards, John.

6th Feb 2018, 10:30 am	#11
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: GEC BT336 possible tube change There may be a leak between sections of the smoothing cap. The value you have will be fine. Testing these large capacitors can be misleading. The PL81 line output valve [not used in the GEC] used to exhibit a similar line but this time it was vertical to the left of the raster. They produced what appeared to be a mini ion trap magnet that fitted snugly around the valve envelope. OK David, yes I know. I should have paid more attention to spelling at school. Regards, John.