NEED HELP WITH A POWER SUPPLY PROBLEM.  RF UNIT, POWER TRANSFORMER, AND LOW 
VOLTAGE CIRCUIT ARE OKAY.  A SHORT BLOWS THE MAIN BREAKER(ON/OFF SW.) 
IMMEDIATELY WHEN TURNING ON UNIT.  REPLACED BREAKER, NEW ONE BLOWS, AND ALSO 
BLEW A 25 OHM 20 WATT WIREWOUND RESISTOR(APPEARS IN THE B- CIRCUIT).  NOT SURE 
HOW TO TEST RECTIFIER DIODES, OIL FILLED FILTER CAPACITORS, ETC.  NO SHORTS 
VISIBLE.  ANY HELP WOULD BE VERY MUCH APPRECIATED.  THANKS,  RICH WO2Y 
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