[Milsurplus] APR-4 and RDO

[WA5CAB at cs.com]

Ray,

The only significant difference between R-375/APR-4X and R-444/APR-4Y is 
that input power for the latter is 115 VAC 380-1000 CPS.  Sensitivity of the 
CV-253/ALR-5 is a little better on the upper two bands than that of the 
single band converters that it replaces.  But not much, because for its purpose 
it neither needed nor wanted to be.  It only had to be better at detecting 
the incident signal from a radar transmitter than the transmitter's associated 
receiver was at detecting the reflected signal.

In a message dated 01/08/2013 15:37:32 PM Central Standard Time, 
RAFANTINI at salisbury.edu writes: 
> I have seen a couple RDO receivers over the years at ham fest and you are 
> lucky to be able to give them away. They are often priced between $50 to 
> $100 but never saw one sell. Have seen APR-1 and APR-4 receivers with one or 
> two plug in sections sell in the $100.00 range sometimes a little more 
> with plug ins by themselves selling for less with the exception of the 
> multiband plug in that sells for more. The APR-4Y tends to sell for more; I ran 
> one up to $200.00 or so on EBay couple months back but did not get it. The Y 
> has newer style front panel and a FM mode but do not know if it has an 
> improved tube line up or is still using octal.  I always wanted an APR-4Y, did 
> have an APR-4 but was not impressed being that it was insensitive and way 
> broad but always wanted to try the 4Y. If anyone has an APR-4Y with or 
> without the spectrum display would be willing to trade something for it.
> 
> RF

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480