[R-390] What have I got here???

[polaraligned]

----- Original Message ----- > set-back in my plan to get it 'lit up' -- the
power plug (J104) is a four
> pin, keyed, plug with a place to lock it down (?) with some kind of screw
> arrangement in the center.  I've not seen any connector like this.  Is
there
> any way of getting one (I'd like to avoid surgery if possible)?

The cord with this connector is often available on e-bay.  Someone seems
to have some NOS ones they are selling off.  Keep looking and one probably
will come up.  $32.92 for buy it now price.
Sounds like you have a really good radio.  It is just the high quality
predecessor
to the 390A.  It's biggest difference is that it uses LC filters instead of
mechanical
ones in the IF.  Do a Google search.  There is plenty of info on these units
including
downloadable manuals, etc...

Good luck,
Scott