[Milsurplus] AN/APR-4Y receiver MF wanted

[COURYHOUSE at aol.com]

I use a multiband head in my  4 non-Y  version of the recv.
 
 
In a message dated 9/14/2016 1:39:23 P.M. US Mountain Standard Time,  
RAFANTINI at salisbury.edu writes:

 
There  is a world of difference between the APR-4 and the 4Y, first off the 
Y has an  FM mode, second the Y uses the first generation of seven and nine 
pin tubes  and last but not least the Y was intended to be used with the 
CV-253/ALR  multiband head that unlike the junk that was built for the APR-1 
and 4  actually works! Let me rephrase that as the signal band heads left a 
lot to be  desired in terms of sensitivity but the multiband head had less 
loss and lower  noise so it worked much better. 
I  have a 4Y that I am not doing anything with but back when I got it had 
to  convert it back to as near the correct military version as possible and 
liked  the design and layout of the receiver being the construction of the IF 
was a  lot like the old tube televisions of the early fifties, the sweep 
tuning for  getting a flat bandwidth was just about the same as would be used 
when working  on TV IF systems. Too bad there is no analog TV today because 
with the flat  bandwidth, envelope detector and video output it would have 
been fun to use  with analog television. 
Ray  F/KA3EKH 
 
 
From: Milsurplus  [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of 
Ed Sharpe  Archivist for SMECC via Milsurplus
Sent: Wednesday, September 14,  2016 3:37 PM
To: Kmec at aol.com;  milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] AN/APR-4Y  receiver MF wanted

 
Jeff-  what is the difference between  apr-4 and  apr-4y?
 
We have  a ECM  display here at  SMECC Museum 
 
of   Jammers and  Receivers. 
( and  yea always looking for  more  too and  all the manuals etc)
 

 
for the  APR-4 you can use all the   single plus ins  or there is a  
wonder plug in of later vintage what is MULTI-BAND ( many of these were  
made 
quite late compared to the  old  single band plug  ins.  
 

 
I  have  found all the plugins to interchange between the APR-1 and  APR4
 

 
Ed  #  archivist at  SMECC Museum  _www.smecc.org_ (http://www.smecc.org/)  
 
 

 
 
In a  message dated 9/14/2016 12:04:58 P.M. US Mountain Standard Time, 
milsurplus at mailman.qth.net  writes:

 
Hello  All!
 

 
Been  looking for an AN/APR-4Y receiver mainframe to complete a setup. 
Anyone have  one they are tired of?
 

 
Also  still looking for WWII jammer stuff, have a lot of it, but you might 
have a  better one for my collection. Working on getting permanent space 
here at the  college for a small museum of WWII  Electrotechnology.
 

 
Thanks  & 73
 
Jeff  Kruth
 
WA3ZKR


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