[Milsurplus] R-648/ARR-41

[Al Klase]

Mike,

With all due respect, that's just not true.  The ARR-41 is a double 
conversion set with a crystal controlled first converter, feeding a 
tuned IF of either 2-3 or 3-4 MHz, and then into a 500 KHz second IF. 
See the manual: 
http://www.radionerds.com/images/0/0c/NAVWEPS_16-30ARR41-502.pdf

This is clearly another elaboration of the Collins 51J architecture, as 
is the R-390 and R-392.  The result is a BC-348 that can be put on 
frequency accurately.

Al

Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/

On 3/21/2016 2:55 AM, Mike Morrow wrote:
> .........It is in no way an aircraft version of a R-390* or R-392/URR.
> It is a relatively light-weight (32.5 lbs) 15-tube single-conversion
> receiver that covers 0.190 to 0.550 and 2.000 to 25.000 MHz........