[Hallicrafters] SX-101 MK3 problem

[k0ewu at juno.com]

HI Hank, you have been missing comments on this reflector about the Black
caps.
after replacing ALL of the black things in the avc line you wll find that
things will look up.
Also the high leakage things in the plate decouplers and the screen
dropping circuit 
will cause low stage gains and if you are not careful a transformer too.
Been there-done that.
jack

On Sun, 2 Oct 2005 19:48:44 -0000 "Hank and Kathy Foglesong"
<foglesong at montrose.net> writes:
> 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
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