On Fri, 26 Feb 2010 23:16:48 -0400, Bill M
wrote:

Richard Knoppow wrote:


All of this points to something in the
detector/avc/noise limiter area.

A big ole DUH for me. ANL switch was open in either position. Amazing
any audio got through at all.

Sounds pretty normal now.

-Bill

I think we've all had our DUH moments. Mine had to do with an HQ-145
which was given to me when I bought a Heath SB-200 from a ham who was
selling the stuff on behalf of an estate from a deceased ham. He said
it didn't work...and it didn't. I recapped it after an inital "smoke
test" was positive. I also bough a 3rd part reproduction manual for
it.

Several instances of cursory testing didn't improve matters and the
receiver was set aside for other matters. Later when I noticed some
minor varients between my receiver and the schematic, I downloaded
another schematic and noted that this new schematic had a note on
it that my orignal schematic did not have. The note said that you
have to have either a send receive relay in place or you have to
jumper the line cord socket on the back panel intended for the
send-receive relay. Otherwise, the receiver will think it is set to be
deadened for transmission. I quickly ginned up a jumper, plugged it
in and of course the receiver worked perfectly. But talk about
feeling dumb.

I think I lost the import of that connection in my tracing the circuit
through some switching.

We all do it.

Jon W3JT