[Milsurplus] Audio Output Tranny- Mystery Failure Mode

[Thomas Adams]

My guess would be shorted turns in the primary.


At 06:03 02-08-13, David Stinson wrote:
>Working on the Navy REP Moral(e) receiver.
>It has a single-ended class A 6V6 output.
>Audio level is about half what it should be and distorted.
>Substitution shows the problem to be both the output transformer and 
>the internal speaker.
>
>I pulled the output tranny.  DC resistance checks show what
>one would expect for good windings.  Used a DC supply at
>90 volts between points and had no detectable leakage between input 
>and output windings or to ground.
>
>Ideas as to what the failure mode in this tranny might be?
>
>73 DE Dave AB5S
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