[Heath] Heathkit HW-100/101 S-meter trouble

[Dick KF4NS]

Ok guys, I am my own worst enemy lately. I can't seem to control my probe. While doing some testing in 
the IF section of my 100 for gain problems feeding my SB-610, I had my DMM probe on the B+ and while 
sweeping it away from the test point I caught it on a wire which caused me to lightly touch ground and 
heard a pop.

Now the S-meter is messed up. Turning on the rig the meter swings to full then back down to zero (normal) 
then immediately followed by a swing back up to 9 +20 and stays there.

With all the settings adjusted according to the receive voltage chart I read -.8-15.8vdc (variable with 
the RF gain pot)  at the grid of V3 6AU6 1st IF and 289vdc on the plate, all normal. I read .52vdc at the 
cathode. Swapped V3, tests good.

At the meter pins on any band I read .25vdc on one side .32vdc on the other with no antenna attached. If 
I touch the grid with a probe there is a loud squeal, no change at the meter. Meter and meter switch are 
fine. CAL sig ON shows no change is meter reading (maybe cuz it would not normally read that high). No 
burned resistors in the circuit.

What the H_E double L did I do this time? It has to be in the AVC circuitry.

73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow!