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Old 11th Feb 2012, 11:35 pm   #11
Heatercathodeshort
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Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,145
Default Re: Pye VT2 EHT problems

I have a 'Scan test' that will check it out reasonably reliably. As Peter has suggested, if you have any known good LOPT from a valve receiver, you only need to substitute the boost diode and line output top caps and if you can then draw a good spark from the overwind output of the donor transformer, there is a good chance the original is below specification. [Damp] The line output stage is very simple with a narrow angle tube. Almost any lopt of vaguely similar spec will give you a picture. You need to compare the circuit of both transformers to get the connection right. I've fitted a Ferguson 968T in a Pye LV30 and an Ekco TS88 in an Ultra W720 with correct linearity and EHT. You can't do any harm to the VT2 if you get anything wrong. Good luck with it. Regards, John.
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