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Old 31st Mar 2020, 11:51 am   #8
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
Default Re: The Ever-Ready experimental transistor TV set.

The good news is the EHT unit still works. I was bit worried because the set stopped working last Saturday along with a slight smell of overheating somewhere in the set. The OC35 series regulator transistor in the power supply is short circuit between emitter and collector.
The EHT oscillator operates at a frequency of 5Khz, this was confirmed by oscilloscope traces. First with my faithful thirty-six year old Hitachi V650 and later with the new RS Components Proscope. I still prefer to use the older 'scope. That instrument was resident in the shop's workshop and now for the time being it is employed in the isolation workshop.

DFWB.
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