[ARC5] Use of 12v R-3/ARR-2X and R-148/ARC-5X In The Same Aircraft

[Mike Morrow]

I tend to consider the AN/ARR-2 'ZB' homing receiver as an integral part of AN/ARC-5.  That was certainly true of carrier aircraft.  So I'd include the R-3/ARR-2X with the R-148/ARC-5X as the only 12v receivers in this series.  Plus I believe there is a service relationship between R-3 and R-148 as explained below

The R-148 is the 12v version of the late-war improved R-23A (not the earlier R-23) and it's surprising there were enough USN 12v aircraft in active war service to justify its production.  One may wonder the same of AN/ARR-2X.  Its existence implies there were enough 12v aircraft flying to carriers and island bases to make it worthwhile, instead of using the older ZB-2 or -3 or AN/ARR-1 homing adapter with the RU/GF command set that 12v aircraft would carry.

I suspect that R-3 and R-148 were intended for alternating use in the same aircraft MT-411/ARC-5X rack, depending on where the aircraft was operating.  The necessary antennas, controls, and spline could be left permanently in place regardless of which receiver was in the rack.

Stateside, navigation between directional Adcock beacons defining the US airways system is required:
- Install R-148 with DY-1 in MT-411.
- Verify cable to C-26/ARC-5 is connected to back of MT-411.
- Connect MC-215 spline between R-148 and C-26.
- Connect wire antenna to R-148.

In the PTO, ZB-homing would be required:
- Install R-3 with DY-1 in MT-411.
- Connect cable from C-2/ARR-2 to front of R-3.
- Connect MC-215 spline between R-3 and C-2.
- Connect coax from AT-5/ARR-1 antenna to R-3.

In either application, navigation could continue without tying up the RU/GF command set, a serious consequence of using an RU/GF for Adcock ranges or an RU/GF with ZB-* for ZB homing.

Mike / KK5F

-----Original Message-----
From: Robert Downs <wa5cab at cs.com>
Sent: Aug 1, 2021 2:04 AM
To: <arc5 at mailman.qth.net>
Subject: Re: [ARC5] Type 12 In WWII

There was also one (AFAIK only) of the AN/ARC-5 receivers made with the filaments (heaters) wired for 12-14 VDC.  This was the R-148/ARC-5X, same otherwise as the R-23/ARC-5.  In my lifetime, I have seen only one of them.  Not too long before he shuffled off this mortal coil, Marty temporarily shipped his to me, just so that I could say that I had seen one of them.  I&rsquo;ve had two or three DY-1/ARR-2X.
 
Robert Downs
 
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Mike Morrow
Sent: Saturday, July 31, 2021 18:39
To: Robert Eleazer; arc5 at mailman.qth.net
Subject: Re: [ARC5] Type 12 In WWII


The 24v dynamotor for the AN/ARC-5 receivers is the DY-2A/ARR-2.  Its nomenclature was first assigned for use with the R-4*/ARR-2 "ZB" homing receiver that was used in most AN/ARC-5 receiver installations.
 
There is a 12v version of AN/ARR-2 using the R-3/ARR-2X.  Its dynamotor is the DY-1/ARR-2X.
 
Thus, there is a proper military dynamotor that is an exact 12v equivalent of the 24v "command set" dynamotors.
 
There are also mechanically and electrically equivent 12v dynamotors from some USN interphone systems that would work well with no modification.
 
For the A.R.C. Type 12 (and 11A and 17) there is the D-10(14v) equivalent to the D-10(28v) that fits earlier military receivers.
 
Mike / KK5F
 

-----Original Message-----
From: Robert Eleazer <releazer at earthlink.net>
Sent: Jul 31, 2021 5:52 PM
To: <arc5 at mailman.qth.net>
Subject: [ARC5] Type 12 In WWII

I did NOT say that Type 12 Radios were used in WWII.  I did say that I have Type 12 radios where the DM-32 dynamotor bases were used with the WWII tank radio 12VDC SCR-528/628 dynamotors so that the system could operate on 12VDC.  If they did that in the late 40's then they could have done it with SCR-274-N equipment in WWII.   By the way, I think the tank receivers used 220VDC, but that would have made no difference.


Wayne

WB5WSV





Virus-free. www.avg.com





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20210801/cf9c9a37/attachment-0001.html>