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sexton_mallard · 17th Mar 2019, 1:49 am

Hi Nick,

I disconnected the connector as suggested and the boost voltage fails to rise as before. I disconnect the line coils and the boost voltage comes up to 680v.

I forgot to mention that I previously swapped the frame coil wire connections in place of the line coils and got a horizontal line (with the line coils disconnected). But probably as the boost voltage climbs, the insulation breaks down. I might try holding a small AM radio close to the deflection coils to pick up any arcing. There is a faint rustling noise from the sound but that could be a noisy volume pot. The PL81 coupling cap C39 was also replaced.

17th Mar 2019, 1:49 am	#72
sexton_mallard Heptode Join Date: Sep 2013 Location: Ellesmere, Shropshire, UK & Co. Cork, Ireland. Posts: 501	Re: Kolster Brandes RV 10 (Crown) Hi Nick, I disconnected the connector as suggested and the boost voltage fails to rise as before. I disconnect the line coils and the boost voltage comes up to 680v. I forgot to mention that I previously swapped the frame coil wire connections in place of the line coils and got a horizontal line (with the line coils disconnected). But probably as the boost voltage climbs, the insulation breaks down. I might try holding a small AM radio close to the deflection coils to pick up any arcing. There is a faint rustling noise from the sound but that could be a noisy volume pot. The PL81 coupling cap C39 was also replaced. __________________ Dom Less snakes...more ladders! Last edited by sexton_mallard; 17th Mar 2019 at 2:08 am.