[Milsurplus] OA-65AMRC-2 Receiver

[WA5CAB at cs.com]

Hue,

First, the receivers modified to OA-65/MRC-2 weren't BC-312's, they were 
BC-342's.  I know that there are only relatively minor differences, but if you 
find either receiver unmodified other than the removal of either the DM-21 
or the RA-20, identifying which you have is trivial.

Second, I think the other receiver you are referring to is R-336/GRC-26, 
not R-339.  I've been unable to turn up any evidence for the existance of an 
R-339.  R-336 was a modified BC-342-N.  The major modifications consisted of 
component value and type changes in the HFO stage, including changing the 
tube to a 6J5, and in the mixer stage.  Other changes were the addition of an 
IF output from the cathode of the 2nd IF amp terminating in an SO-239 on the 
front panel, changing the antenna connector to an SO-239, and replacing the 
RA-20 with an RA-20-B.  All of these changes are the same as were 
accomplished in Receiver A of OA-65/MRC-2, except that in the latter, the HFO signal 
was also run to a connector added on the rear of the receiver.

Robert D

In a message dated 05/29/2012 15:33:43 PM Central Daylight Time, 
kargo_cult at msn.com writes: 
> Somehow I got the idea that G&G was importing BC-312 series MRC-2 
> receivers from France around early 1970s. I'm reasonably sure I got this
> info straight from them, either by letter or by phone call around 1972.
> But - I have never ever seen such a modified receiver, altho I have 2
> SARF French BC-312s.  I wonder how they got over here. You'd think
> the supply of BC-312s here would be enuff to satisfy war-surplus era
> demand, but maybe G&G got a good enuff deal to import all varieties
> of BC-312. 
> Now what about the R-339 ( KW BC-312 ), what's the story on that?
> Are those gov't rebuilds, and why the new nomenclature? I have only
> seen one of those here. Still think time to time, I should buy it, but
> have maybe enough of these heavy beasts already, plus a recent 
> surgery is making me take a less cheery view of the heaviest metal.
> -Hue 
> _______

Robert Downs - Houston
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