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Old 27th Dec 2016, 2:51 pm   #93
GeoffK
Heptode
 
Join Date: Mar 2016
Location: Essex, UK.
Posts: 602
Default Re: My first valve radio project - Philips 462A

The radio might have looked better if you had just put the smoothing and reservoir capacitors underneath the radio, and saved a lot of work.

From the experiments with the voltage tap it could be there is a 'shorted turn' in the primary of the mains transformer and putting the tap on 200V is boosting the winding as 240Volts is being applied to the 200 Volts setting, but if this is the case then it is not a good condition for the transformer to operate at.

The lower tapping settings definitely should not be used, the vibration is because of severe overload.
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