[Milsurplus] APR-4 FURTHER

[MWM]

Ok Ray, thanks. Mod looks too simple to fm demod, I'm guessing noise limiter etc but will try and trace wiring etc. 


Ben.  




Subject: RE: [Milsurplus] APR-4 FURTHER


APR-1 heads work ok in a APR-4 or APR-4Y, too bad your overseas being I have a 
couple APR-4 heads and APR-4 and would sell them cheap. Don't think any 
modifications are stock to that set. Maybe someone tried to install FM 
demodulator?  Think I have that same low band head in the picture and have used 
it in my 4Y with no issues.

Ray F

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] 
On Behalf Of MWM
Sent: Monday, October 14, 2013 12:44 PM
To: milsurplus at mailman.qth.net
Subject: [Milsurplus] APR-4 FURTHER


APR-4 FURTHER


Hi all, 


Many thanks to those who replied with info on the APR-4, in particular Ron , 
many thanks for circuits.
I have now received the APR-4 chassis, looks reasonable but I find its APR-1 
tuning units I have in stores. I think I can still use them though?


Anyway, pic of set is at:   here


http://www.qsl.net/g4bxd/apr4rx.jpg


Rx has a small added on chassis and valve holder, akin to the diode noise 
limiter seen in HRO sets, pic at: here


http://www.qsl.net/g4bxd/apr4addon.jpg


does anyone have info on this mod?


And, there's a missing component, cap maybe, was attached to corner i.f.t., pic 
at:  here


http://www.qsl.net/g4bxd/apr4missing.jpg


If anyone can help I'd be most obliged. 


cheers, Ben G4BXD.
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