[R-390] 392 low audio

[Robert Newberry]

Strange as it may sound I picked up a 392 with some minor issues a few
months ago and have had a blast fixing, replacing, and aligning as
necessary. I have one last issue left that has me still scratching my head.
When I switch to the 4kc and 2kc band width setting the AF amp audio from
the speaker is quite low.

To work around this I just turn the volume up almost full blast to get a
workable audio level. 8kc is fine I'm reminded of it when I switch back to
8kc and am nearly blown out of my operating position.

I was with a friend at the hamfest this weekend and compared it on his 392
and his bandwidth setting do not cut the audio back like mine at all.

Anyone have any advice in this?