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PFC unbelievable!



Original poster: "Rick Williams by way of Terry Fritz <twftesla-at-qwest-dot-net>" <richardwwilliams-at-earthlink-dot-net>

Hi List,
 
Got some 12uF 240v run caps from <http://www.usamfg-dot-net/>http://www.usamfg-dot-net/
for 50 cents each. ( #71932 )
 
Found out 8 of them were optimum, 96uF for one 15/30 NST and a Staco 25amp
variac.
 
Current was measured from the wall plug using an AC ammeter. 
NST output voltage was measured by a high voltage voltmeter (0-40kv).
 
With the variac set to maximum without the PFC current was 4.25 amps, with PFC
it dropped to 0.7 amps, 700ma !!!! 
 
With the variac set to MINIMUM the current measured 4.20 amps with the PFC.
Makes sense.
 
NST output current behaved the same with or without the PFC varying smoothly
with the variac.
 
The schematic:
 
<http://potluck45.homestead-dot-com/files/PFCcaps01.jpg>http://potluck45.homest
ead-dot-com/files/PFCcaps01.jpg