[ARC5] FW: Jeeps with Radio Equipment

Fri Jul 30 15:10:22 EDT 2021

The PTO run generator for the MB only saw prototype use, and was not adopted by the US Army as standard, even for radio Jeep’s. Fords version was the standard for a 12 volt radio Jeep. Some were factory installations, most modifications were done in theatre. Not all radio keeps were modified to 12 volt as most ground forces radios had power supplies for ground forces radios that had a setting to power the radio using the 6 volt electrical system, so there really was no pressing need for the Army to use a PTO operated generator to supply power. The only jeep supplied with a PTO ( which mated up to the rear of a standard jeep transmission) was the GPA Amphibian, and GPA’s were not all that common. The PTO ran the shaft for the GPA Propeller, and a pulley that powered a bilge pump. 
       Take a closer look at those radios. They are not standard ARC-5 or SCR-274-N. 

Mark D. 
WW2RDO

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

Sent from my iPhone

> On Jul 30, 2021, at 1:37 PM, Michael Hanz <aaf-radio-1 at aafradio.org> wrote:
> 
>  That makes sense to me, too, Steve.  After all, the radios came from USAAF supply - both Homelite and Eclipse had APU's in the 2,000 watt range.  Why not grab one of those little guys?  It would eliminate all the conversion effort and makeshift scrounging of transmitter dynamotor, relays, etc...  Plus, it would make replacement a drop-in from normal stock.  A pair of those batteries like the ones below looks like they would fit under the radio set in the Iran photo.  Easy peasy.
> - Mike
> 
> <Page_1_96_England_.jpg>
> 
> 
> On 7/30/2021 12:51 PM, ke5o at sbcglobal.net wrote:
>> I am not seeing the PTO generator so where is the 12 volts coming from? I would guess the jeep has 24 volts in batteries under the radios that are charged with an APU.
>>  
>> Steve G
>>  
>> Ke5o
>>  
>> From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of MARK DORNEY via ARC5
>> Sent: Friday, July 30, 2021 10:38 AM
>> To: Dave Merrill <r390a.urr at gmail.com>
>> Cc: ARC-5 <arc5 at mailman.qth.net>
>> Subject: Re: [ARC5] Jeeps with Radio Equipment
>>  
>> The radios may not be ARC-5, SRC-274 or ARA radios. They may be an earlier look-a-like that ran on 12 volts. Either that, or parts were scrounged and radios were heavily modified. As far as meeting AAC limits, that may not have really mattered. These were definitely not built to some factory spec in this application. All that mattered is that they work and fill a mission need. 
>>  
>> Mark D. 
>> WW2RDO
>> 
>> “In matters of style, float with the current. In matters of Principle, stand like a rock. “.   -   Thomas Jefferson 
>>  
>> Sent from my iPhone
>> 
>> 
>> On Jul 30, 2021, at 11:26 AM, Dave Merrill <r390a.urr at gmail.com> wrote:
>> 
>> 
>> I could see rewiring the filaments for 12 VDC, but what about the relays? Aren't they all 28 VDC?
>>  
>> Dave N9ZC
>>  
>> On Thu, Jul 29, 2021, 12:41 AM Bill Pileggi <wpileggi at juno.com> wrote:
>> Slightly over 10 years ago (June 2011) , there was a mention on this list of a photo of a Jeep with ARC's in the rear deck. At the time, they would have provided a link. Don't know what the link is now... Nobody seems to have brought it up... As a bonus, there's a B-24 in the background.
>> 
>> So, I'm attaching. It's about 89 Kb.
>> 
>> Bill KA3AIS
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> -- 
> Michael Hanz - KC4TOS
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