07-06-2014, 07:48 AM
(06-06-2014, 01:46 PM)Refugee Wrote: The DMM will give an odd reading there due to the current peaks in the rectifier charging the capacitor.Point taken. I'll check the readings again with an analogue meter, but, as note in the previous post, I realised that I was measuring the voltage drop from the mains input to the rectifier anode. However the rectifier is fed from a tap on the autotransformer, so only about 40mA or so (the HT current) passes through the series resistor. My calculation included the Valve & pilot lamp currents as well. As I said, I've only been servicing Radios, etc., for 44 years!!'
A false high is most likely there.
