[Milsurplus] RDO countermeasures receiver.

[WA5CAB at cs.com]

Officially, the RDO used TN-1B/APR-1 through TN-4B/APR-1, which collectively 
tune from 38 to 4000 MC.  In practice, it can use TU-56 through TU-59 (slight 
mod required to the TU's), any revision of TN-1/APR-1 through TN-4/APR-1, and 
any revision of TN-16/APR-4 through TN-19/APR-4 plus TU-54/APR-4.

The AN/APR-4 TN's cover the 38-4000 MC range in five bands instead of four.

The aircraft versions (set nomenclatures, not component) were ARC-1, SCR-587, 
AN/APR-1 and AN/APR-4.  Plus a variant (different antennae) of the AN/APR-1 
was nomenclatured AN/SPR-1.

In a message dated 9/10/2005 10:12:00 AM Central Daylight Time, 
kgordon at moscow.com writes: 
> I recently brought two RDOs home. There were also a considerable 
> number of plug-ins for these receivers, some still in the original packing 
> boxes.
> 
> Does anyone here know exactly how many plugins and what 
> frequencies there were originally available for those?
> 
> I also ended up with a smaller, aircraft version, of the RDO. It uses the 
> same plug-ins.
> 

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
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