[R-390] Auction R-390A

[Barry]

Kind of minor, but the KC knob isn't original.

I was trying to figure out if there might be a way this might still be a
functioning receiver.  The P/S could be modded, the ballast could be shorted
with the proper 12B?? tubes or there's an under-the-chassis resistor.

I don't know for sure, but if the missing tubes in the AF unit are the final
power tubes, then if the guy was tapping off the diode load through an
external amp, then the final PA tubes can be removed, just to keep down
heat, right?

While easily replaced, the B+ fuse is a problem.  The radio sure won't work
without that (unless the previous owner decided it wasn't all that necessary
and just shorted it).

Just my $0.02.

Barry(III) - N4BUQ

----- Original Message -----
From: "richard may" <richardmay at hotmail.com>
To: <r-390 at mailman.qth.net>
Sent: Saturday, February 19, 2005 6:53 AM
Subject: [R-390] Auction R-390A


>
>    Sure  got  quiet here lately. Guess everybody is burned out discussing
>    ballast tubes. Anyway, I was looking at an R-390A (#5752624165) listed
>    on  you know where. This is a pretty nice looking receiver in that the
>    wiring and chassis looks pretty clean. Although the seller doesn't say
>    if it fires up or not, it appears to be not functional. Here is what I
>    see.  The  cal/osc  plug-in  is  missing, one fuse cap is missing, the
>    screw  on  the  crystal  deck  is  missing indicating possible missing
>    crystals.  some  tubes  are  missing.  The  3TF7 is missing, no way of
>    knowing  if  a  resistor  mod  has  been made. The rectifier tubes are
>    missing,  the unbent  sockets  tell  me  the power supply has not been
>    modified  with  diodes. I also believe this receiver has been dropped.
>    Look  closely  at the bent ear on the side panel and the sheared screw
>    on the faceplate.
>
>    Buyers, beware. If you are looking for a functional receiver, you have
>    some work to do. Just my thoughts. Have a nice day. Richard
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