[Hallicrafters] SX-101 MK3 problem

[Hank and Kathy Foglesong]

I am restoring a SX-101 MK3 and have run into a seemingly minor problem that manifests itself in the inability to properly zero and operate the s-meter.  The s-meter circuit and components themselves check out OK, as do the voltage measurements on the s-meter tube.  However, the voltage output from pin 8 of V7 (AVC/noise limiter tube) is only 10% of the specified -2 volts.  Since this output feeds the s-meter adjustment circuit as well as providing AVC feedback, I suspect this may be the problem.  I am, however, having difficulty finding the cause of the low voltage out of the AVC tube.  I have done the obvious things such as changing out the tube, checking resistances, etc., though I have not yet started to replace components.  Has anyone run into this problem or have a suggestion as to where I might look for the problem?  Please note that the receiver performs very well in all other aspects.

Thank you

Hank Foglesong