[Boatanchors] Refurb S-38C Gone Crazy

[Bill Cromwell]

On 04/01/2014 12:03 PM, Bob Jackson wrote:
> 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
> ______________________________________________________________
>
Hi Bob,

One of the things I learned about situations like this - long ago. You 
have a wiring error there somewhere. You probably did it. If you don't 
have another set of eyes to look at with/for you then set it up on the 
shelf a few days (or a little more). Then start all over and 
troubleshoot it. Without taking that break you will keep hammering home 
the same mistake over and over again. Been there - done that. After an 
approriate break it's usually only minutes to find the trouble and the 
'duuhhh' moment.

It's not just for radios, either.

73,

Bill  KU8H