[R-390] IF module - snap on touch

[Gordon Hayward]

To me this sounds like a bad connection where touching discharges a cap then things work until the cap saturates again.
I've seen this before and this type of a problem is a bear to diagnose.

Cheers, Gord VE3EOS

> I had the IF module out while watching a 3 hr movie.  Put it in cold, turned it on, and gain was low.  Touched the 4K filter out
> connection and snap, the gain came right up.  Let it warm up for a while and gain dropped off, touched the 4K filter again and
> snap, gain came back up.  Did this 3 times but final time the gain did not come back up fully to -7V diode load with the 4K.  The
> other filters were still at set gain.  Looks like for some reason the 4K filter is doing something, but maybe the switch is doing
> something bad too?  When I touch any of the other filter output connections in their respective BW position, nothing happens except
> a tiny pop.