[ARC5] Type 12 In WWII

[MARK DORNEY]

I’m thinking that unless some of those 12 volt ARC-5X transmitters were shipped to England to support RAAF operations in Europe, the only place those 12 volt relays would have been available would have been Australia, and maybe in the Pacific. So I think we’re stuck with a battery bank, with an APU used to charge the batteries for ARC-5 stuff in Europe for ground field vehicular use. I’d still put the APU in a tow behind trailer. 1/4 trailers ( MBT ) were a dime a dozen in Europe, and unless you like having that noisy, carbon monoxide spewing APU next to you in a Jeep, I’d put it in a trailer. The sides of the trailer may act as a baffles if you run the APU with the unit inside the trailer. Don’t forget to ground the APU if you are actually using it. 

Mark D. 
WW2 RDO

“In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 

Sent from my iPhone

> On Aug 1, 2021, at 3:05 AM, Robert Downs via ARC5 <arc5 at mailman.qth.net> wrote:
> 
> 
> 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’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
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