[ARC5] Type 12 In WWII

[Kenneth G. Gordon]

On 1 Aug 2021 at 8:52, MARK DORNEY via ARC5 wrote:

> I´m thinking that unless some of those 12 volt ARC-5X transmitters

Mark: there were never any "ARC-5X" transmitters ever made. Never. None. Zero. Zip.

There is ONLY ONE "ARC-5" RECEIVER that was set up for 12 VDC use, and that was the 
R-148/ARC5X, a 12 V version of the R-23/ARC-5 beacon band, 190 to 550 kc receiver. 
There were very, very few of those made, probably for use in small observation airplanes like 
the military version of the Piper "Cub" or in training planes.

> 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.

No. Never. Never happened. Not ever. Not even once. Such gear simply didn't even exist.

> 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.

For the intermittant use for which such units were built, I see no need to install an APU in or 
even near, the radio installation. Batteries would have been completely sufficient.

Ken W7EKB