Thread: Pye p43
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Old 13th Jun 2021, 9:24 pm   #4
kestrelmusic
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Join Date: Feb 2008
Location: Wrexham, North Wales, UK.
Posts: 466
Default Re: Pye p43

Start by getting the Trader sheet for this set (link at the top right hand corner of this page).

Unless you have one, get a multimeter which reads ohms and volts at least (£5 on ebay). Identify tags c, d and e of the output transformer and check them with the ohms range of your meter. d to c should be of the order of 15 ohms and d to e around 400 ohms. This is much the most likely source of faults.

If these figures are around the right level, switch your meter to a high DC volts range (250V or greater), switch the set on and measure the voltage between each of tags c, d and e and the chassis. WITH CARE!!! You should be getting readings around 200V. If any of these is much lower than this, suspect the reservoir/smoothing capacitors. If the voltage is at or near zero, the likeliest culprit is the mains transformer secondary.

It's unlikely to be a valve problem, these little chaps are very robust.
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