Audio amp Mystery

On Sunday, April 2, 2017 at 6:07:53 PM UTC-4, Bill Bowden wrote:
> 
> news:9f098c48-57b7-49b2-b388-f610e311462c@googlegroups.com...
> >I suspect it wasn't really the transformer that
> > changed.  Class AB push pull circuits like
> > those used in small radios often have a
> > small thermistor to set the idle current.
> > I suggest you check k that area.
> > M
> 
> 
> Yes, I thought of that idea, but I don't have a schematic or a circuit 
> layout picture so it would take a lot of time to trace out the circuit to 
> construct a schematic. It's obviously an intermittent connection, so all I 
> can do is look around and hope to find it. But it's working fine now, so I'm 
> going to leave it alone.
> 
> .

if it ain't broke, don't fix it is good policy.

next time though, look in the area of the bases of the two output xitors.

m