Hi Nick,
If you stop by sometime I think I can measure the secondary resistance of your filament transformer. I have a keithley 2002 lab meter with 4 wire resistance measurement capability and it can measure down into the milliohm range.
I am not certain of a good way to measure the esr in such a large cap, although presumably you could do it using 60Hz sinewave and a series resistance where presumably the ESL would be irrelevant.
If you stop by sometime I think I can measure the secondary resistance of your filament transformer. I have a keithley 2002 lab meter with 4 wire resistance measurement capability and it can measure down into the milliohm range.
I am not certain of a good way to measure the esr in such a large cap, although presumably you could do it using 60Hz sinewave and a series resistance where presumably the ESL would be irrelevant.
The filter caps for the plate supply have changed I have 2 20mfd 2 kvdc caps on the way they are oil caps.
I still may use the electrolytics to push up the capacitance sense now I am pulling less current through it before I did the math and for 1% ripple I need something like 63,000mfd which isn't going to happen.
As for the fil. transformer I dont think I could buy better one atleast for no less the a few hundered buck they are over built got them from a old lamda rack mount power supply.
So now I need to buy 4 more rec's and figuare out a het sink.
Nick
I still may use the electrolytics to push up the capacitance sense now I am pulling less current through it before I did the math and for 1% ripple I need something like 63,000mfd which isn't going to happen.
As for the fil. transformer I dont think I could buy better one atleast for no less the a few hundered buck they are over built got them from a old lamda rack mount power supply.
So now I need to buy 4 more rec's and figuare out a het sink.
Nick
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