[R-390] what is it?

[John KA1XC]

Hi Gene,
Hmm, good question. (BTW it's item # 5712724918 )

My guess it's some type of audio distribution or amp setup.
Visible on the left are a wire pair going to the Local Audio output
terminal, and there appear to be a few 1/4 inch phone jacks and also RCA
type jacks on phenolic insulators, which is a way to reduce ground loops.
(Could be Nuvistors or transistors too but I'll stick to the RCA guess)

The round green transformers on top are about the right size for
line-levels, and the round thingy on the far right might be another
connector or possibly an old style power transistor. Could be some
additional connections under it that we can't see.

Also another couple of things going on, there's a nicely done C to SO-239
minibox adapter, and extension cables for external meters which appear to be
connected via those blue wire nuts on either side of  the rear of the front
panel.

There seems to be an endless variety of custom modules and hang-on gizmos
for these radios, saw quite a few of these unknowns a few years back when
perusing the piles at Fair Radio.

John







----- Original Message ----- 
From: "Gene Dathe" <dathegene at hotmail.com>
To: <r-390 at mailman.qth.net>
Sent: Saturday, July 31, 2004 10:47 AM
Subject: [R-390] what is it?


> Hi gang--there's an EAC up on Epay right now.  On the back of the radio it
> has some attachment in the center I've never seen.  What is it?
>
> Gene NA0G