[Boatanchors] Refurb S-38C Gone Crazy

[Gary Schafer]

Check your AVC line for a short to ground or leakage pulling it up. A leaky
tube or IF transformer could do it.

73
Gary  K4FMX

> -----Original Message-----
> From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
> bounces at mailman.qth.net] On Behalf Of Bob Jackson
> Sent: Tuesday, April 01, 2014 11:04 AM
> To: porch; qth
> Subject: [Boatanchors] Refurb S-38C Gone Crazy
> 
> This radio won't go silent, not even close! When turned on and warmed
> up, a low but fully "listenable" level of clean audio is present. With
> only slight advance of the volume control, audio level skyrockets. The
> set is fully re-capped; all caps and resistors test OK. Volume pot is
> good.
> 
> Circuit has been traced multiple times for voltage values. All are
> within bounds of schematic values. Swapping out the 12SG7 for a 12SK7 is
> of little help. 12SQ7 has been swapped as well - no effect. Has anyone
> else had this problem? Any suggestions would be very welcome.
> 
> 73 to all,
> 
> Bob  AG5X
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