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Old 6th Dec 2018, 7:33 pm   #22
FERNSEH
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Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 6,228
Default Re: Baird T5 retoration project.

Testing the HT and heater supply power supply unit. The smoothing capacitors are useless and will not reform. Two 16microfarad 450volt capacitors and one 24microfarad 450volt electrolytic capacitor are required. The 24mfd capacitor will be replaced by an 8 + 16mfd component.

With the two Mullard IW4-350 HT rectifier valves removed 360 VAC can be measured at the anode connections of the rectifier valves.
The mains transformer runs cool, so it's likely there will be no problems with that component.

The 5KV EHT unit will receive attention next.

DFWB.
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