UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Heatercathodeshort · 5th Oct 2015, 7:06 pm

Nice bit of detective work there David. That line oscillator/flywheel sync circuit should be 100%.
The EF80 reactance valve used to go to sleep due to under use but would wake up if swapped with one of the IF valves.

If you don't get any video signal but all seems ok, remember the vision detector crystal inside the final vision IF can. These tend to become O/C after all these years. Changed a few recently.

Looks good so far. That monster started life as a little 203T 14" table model!
John.

5th Oct 2015, 7:06 pm	#33
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Ferguson 247T: huge console TV set. Nice bit of detective work there David. That line oscillator/flywheel sync circuit should be 100%. The EF80 reactance valve used to go to sleep due to under use but would wake up if swapped with one of the IF valves. If you don't get any video signal but all seems ok, remember the vision detector crystal inside the final vision IF can. These tend to become O/C after all these years. Changed a few recently. Looks good so far. That monster started life as a little 203T 14" table model! John.