[Milsurplus] [Boatanchors] Audio Output Tranny- Mystery Failure Mode

[jmfranke at cox.net]

Partially shorted primary winding.

John  WA4WDL

---- David Stinson <arc5 at ix.netcom.com> 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
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors at mailman.qth.net
> 
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
> 
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html