Since we are in monsoon season here in AZ - if any storm is in area or
predicted - I disconnect everything - both at tower and at shack wall.
I noticed this morning that when I plug the KPA500 back in -(its on a 240
circuit all by itself) I hear what appears to be an initial transformer
magnetizing input hum even though the ON switch is OFF .
All seems to be working fine - going from ON to OFF the fan runs to bleed
down the PS and amp works OK - I just never noticed this hum before .And
the hum is just at the initial plug in - it does out to inaudible.
It appears even when the KPA500 is "OFF" the transformers are still being
fed from AC line - TRUE ????
Sheet 1 of 2 of the PS shows a "switch" right at input but that appears to
be part of the input 120/240 module , KPA500 Front Panel Switches shows the
"ON-OFF" sw just as a closure to ground feeding control logic at which point
I get crosseyed.
Hank K7HP
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