"William Mutch" wrote in message
ell.edu...

On my rig the line measures only millivolts negative and 0.4 ohms
to ground. I thought first I had a shorted electrolytic and replaced
all the caps on the line. No joy. Then I thought the transformer
center tap might be shorted to the case, so I unsoldered it and measured
it. The Xformer is very healthy but the line still measures 0.4 ohms to
ground.
Any suggestions what I should look at next?



tnx de kc2lvq

This happens all the time when somebody replaces the filter caps with the
typical modern ones that have the case connected to the negative lead. The
original capacitor probably had two leads, neither one grounded to the case.

You may need to insulate the capacitor case from chassis ground.

This happens all the time when somebody replaces the filter caps with the
typical modern ones that have the case connected to the negative lead. The
original capacitor probably had two leads, neither one grounded to the case.

You may need to insulate the capacitor case from chassis ground.


This filter cap is an actual new old stock in the old style case
which sits in an octal socket isolated from ground. I can try pulling
the cap and see if the B- line goes up to 500 ohms above ground.