The receiver is either R-4 or R-4A/ARR-2 with DY-2A/ARR-2 dynamotor, mounted in MT-7 or MT-7A/ARR-2 rack on MT-5/ARR-2 mounting base.  MX-2/ARR-2 power and audio shorting plug is required on the MT-7, which has no audio bus select switch.  If MT-7A (with audio bus select switch) is used, then MX-2 should have its connection between pin 2 and 8 lifted.

 

Audio output should be to J-16 orJ-22/ARC-5, mounted on MT-78/ARC-5.  Control box C-2/ARR-2 mounts on MT-4/ARR-2 and connects to the receiver with MC-215 type spline.

 

The antenna is AT-5/ARR-1.

 

Mike / KK5F

-----Original Message-----
From: Doran Platt <jeepp@comcast.net>
Sent: Apr 17, 2023 1:24 PM
To: MARK DORNEY via MRCA <mrca@mailman.qth.net>
Subject: Re: [MRCA] Latest acquisition

 

My first ever surplus acquisition was an R4/ARR-2, bought in 1959 from Fair Radio.  What ever happened to it?  No clue....
Jeep K3hvg
On 04/17/2023 1:41 PM MARK DORNEY via MRCA <mrca@mailman.qth.net> wrote:
 
 
R-2/ARR-2 with dynamotor, mounted in a single ARC-5 rack, mounted on an MT-2/ARR-2 shock mount. Control box is a C-2/ARR-2 mounted on an MT-4/ARR-2 control box mount.
 
Mark D.
WW2RDO