[Milsurplus] Oddball Receiver

[W7QHO at aol.com]

In a message dated 7/18/07 6:57:12 AM, ka1kaq at gmail.com writes:


> On 7/18/07, David's Mail <arc5 at ix.netcom.com> wrote:
> > 180140317292
> >
> > Comments?
> 
OA-65-A/MRC2, "top half" of a dual diversity lashup as Robert mentioned.   
Receiving side of the MRC-2 system.

Two modified BC-342s mounted one above the other and lashed together so that 
the high frequency oscillator in the upper or "A" receiver also drove the 
lower "B" receiver.   This was done by means of an "O-59" chassis mounted on the 
back of the two receivers containing a two stage (6AK6 and 6C4) isolating 
amplifier.   The receivers were modified to include connectors which mated to the 
O-59 unit through cutouts in the backs of the cabinets.   Other modifications 
included bringing the IF from both receivers out to BNC connectors on the front 
panels (can be seen on the far right side of the eBay unit) and other mods to 
the "A" (master) receiver were including to improve frequency stability.   
New power supplies were also developed for both receivers which included an 0A2 
regulator for the receiver's oscillator, screen and BFO circuits.

Dennis D. W7QHO
Glendale, CA



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