In article ,
tchrme wrote:
I need some of the wisdom of the group. I started to have the
thunderstorm crash type of noise on all freq on my SX 100. I know this
is indicative of silver mica disease in the IF's when they have the
embedded mica caps built into the bottom base of the xfmr. Does this
also happen with discrete mica caps in the IF xfmrs like in this rcvr?
Any other ideas on possible causes? Thanks for the help. Mike KF6KXG

Start pulling tubes in the IF strip until you find the stage where the
noise is coming from.

Yes, the discrete mica caps can also exhibit similar breakdown. Once
you identify the stage, you can disconnect them and see if the problem
goes away.

Some resistor failures can seem similar, but they are usually combined with
microphonics as well. Not always, though.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."