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Old 7th Mar 2010, 11:19 pm   #215
Pamphonica
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Join Date: Mar 2008
Location: Virginia Water, Surrey, UK.
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Default Re: The "Sussex" Homebrew Valve Tester.

Thanks Ed, that clears things up. I am sure the spec is fine for all normal uses. As I suspected, there may be an impact on the highest HTs but not at lower HT settings.

All I was trying to get straight is the RMS vs rectified DC currents. If the winding gives 100mA at 250V RMS and it is rectified, the DC current limit from the smoothing cap is derated to about 70mA. But at all normal settings (eg 250V DC), there will be ample headroom in the regulator section if slight excess current is drawn for short periods.

Thanks
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