[ARC5] APR-4 Fans

[scottjohnson1 at cox.net]

It was tuneable, but after WWII, it was fixed at 1030/1090, and the APX-25 SIF encoder was added.  It was then capable of modes 1,2, and 3/A

 

Scott W7SVJ

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Doran Platt
Sent: Sunday, July 30, 2023 13:49
To: mstangelo at comcast.net; ARC-5 <arc5 at mailman.qth.net>
Subject: Re: [ARC5] APR-4 Fans

 

Isn't the APX-6 an L band IFF set, around 1100 Mhz?.   Predecessor to the APX-25/ KY-95 IFF/SIF set. 

K3HVG 

On 07/30/2023 4:02 PM EDT mstangelo at comcast.net <mailto:mstangelo at comcast.net>  wrote: 

  

  

Loved it. I used it to listrlen to the Aeronautical VHF band and to tune up my modified APX-6  transceiver.  

  

Mike N2MS 

On 07/30/2023 3:55 PM EDT David Stinson <arc5 at ix.netcom.com <mailto:arc5 at ix.netcom.com> > wrote: 

  

  

Who here is the biggest fan of the APR-4 search receiver? 

  

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