[Hallicrafters] SX-100 S-pmeter

[Carl]

It sounds like you need a scope or VTVM to discover the source of the 
wandering voltage.  Perhaps a tube on the AVC chain with leakage, a paper 
cap you missed, a leaky mica cap on a B+ line, maybe even a flaky resistor.

Carl
KM1H


----- Original Message ----- 
From: "jsloss" <k7mks at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Thursday, May 06, 2010 11:34 PM
Subject: [Hallicrafters] SX-100 S-pmeter


> Am restoring a SX-100 which has a wandering S-meter "zero" from band to 
> band.   In addition the meter needle does not remain steady when zeroed. 
> Meter zeroed with antenna inputs grounded.  V-4 6BA6 replaced with no 
> improvcement
>
> Any ideas?
>
> Joe k7mks
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