HW-100 S-meter problems

[jsloss]

S-meter intermittently reads correctly and then at times it sits on zero.  At times it will not peg to the right when the RFG is full CCW.

V3 and V4 have been changed. S-meter zero pot checks OK.  P, SG, K, and G voltages of V3 and V4 check OK per manual and do not change from the normal S-meter to non-working S-meter situation.  Both relays have been cleaned.

When working correctly it reads over S-9 w/ calibrator signal and then fades slowley to the non-indicating position of S-0.

Freeze-mist, heat, resoldering connections, tightening board screws so far have failed to discover the culprit.  

Just turned the -100 on and the meter goes full right w/ RFG full CCW.  Calib. signal reads 9+ but wavers up and down a S-unit or so.  Eventually it will fade down to S-0.

I'm hoping there is someone who has experienced a similar problem - I feel like I am going around in circles.

Thanks

Joe k7mks

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