UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - My first foray into Old model TV repairs. Ferguson 991T.

Heatercathodeshort · 29th Sep 2020, 5:20 pm

WOW! Well done and a good tube into the bargain.
I too had the three section electrolytic cap u/s. It was open circuit giving an 'S' shaped picture. I used a double 50uf and added an 8uf after arranging a new securing clip for it.

Frame caps will need replacing of course, [remember the .05 linearity feedback on top of the FOPT..] but that raster is pretty good all things considered. I had a total collapse at first light. Great progress. John.
PS With regard to the current required. Start off low then check the overwind after 30 mins. If it feels warm that should be OK. It's trial and error. The idea is to drive out the damp from the inside of the winding. External heat will not do it. J.

29th Sep 2020, 5:20 pm	#46
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: My first foray into Old model TV repairs. WOW! Well done and a good tube into the bargain. I too had the three section electrolytic cap u/s. It was open circuit giving an 'S' shaped picture. I used a double 50uf and added an 8uf after arranging a new securing clip for it. Frame caps will need replacing of course, [remember the .05 linearity feedback on top of the FOPT..] but that raster is pretty good all things considered. I had a total collapse at first light. Great progress. John. PS With regard to the current required. Start off low then check the overwind after 30 mins. If it feels warm that should be OK. It's trial and error. The idea is to drive out the damp from the inside of the winding. External heat will not do it. J. Attached Thumbnails Last edited by Heatercathodeshort; 29th Sep 2020 at 5:28 pm. Reason: Added info.