Hi Gary,
Yes, you are also looking at the 12 volt line.
Only 1.7 ohms is too low. Look at your meter. Is the positive lead
at Q7 - if not you could be turning on D12 on the 12 volt feed. That's
a reverse polarity protection diode. Also, the resistance readings don't
come out right if your
Gary,
You have a short (or at least a very low resistance) to ground somewhere in
the PA collector circuit or on the +12 volt line.
The easiest first step in isolating it is to remove the heat sink. The tabs
on the PA transistors are connected to the collector, and the thermal pads
are
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