[R-390] Trouble shooting the R390A

[Jon]

To the Group:

I have been going thru the IF and audio stage with respect to recapping,
taking resistance measurements, checking tubes, cleaning, etc, being very
careful and taking notes along the way. I recently just received the front
panel back from painting it and I decided before I continue to go thru the
RF, xtal and PTO stages, I wanted to put it all back together and make sure
I didn't break anything. (I really wanted to see how the panel looked.)
Well, as of tonight, I fired it up and noticed right away no audio.
Immediately, I played around going from 1 to 20Mhz and I also switched in
the CAL but noticed again no audio. The lamps however lite up.  I turned the
receiver off and checked the fuses and notice the 1/8 fuse has blown. My
thinking is to first see if it blows again and if so then take out both the
Audio and IF stage and power cycle again. I'm hoping to isolate it to one of
these stages with the assumption I mess something up. I'm just shooting this
out to see if the group has another preferred way of debugging or knows the
cause(s) when this particular fuse blows.
I would like to thank everyone in advance for their comments. I am as always
much indebted.

73's,
Jon, KB1DC