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Old 4th Jun 2010, 10:35 pm   #11
Sideband
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Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,548
Default Re: Vidor CN429 'Lady Margaret' fell silent

There won't be any DC voltage on the secondary.....it's audio. If both tags of the primary are reading 79 volts then it seems OK. Try to see if there is any voltage on the anode of the DL96. If there is, then the primary must be OK unless the tone corrector cap (if there is one) has gone s/c. Battery valves do not run noticably warm. Find the volume control, turn the volume to maximum and touch the centre contact. If the audio stages are working, you will hear a hum. If not then it's likely that one of the valve filaments is OC. Let us know what you find.


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