[ARC5] Latest aquistion

[MARK DORNEY]

The TBM/TBF Avenger typically didn’t have an ARC-5 Command set installed, even post war. Typical was the ART-13 transmitter, ARB Receiver, ARC-1 transmitter, and the ARR-2 Receiver a long with whatever IFF and Radar gear the aircraft may also have had. There would not have been an MT-65 in the aircraft in that configuration. The single MT-7/ARR-2 rack would have been typical. Fighter radios did sometimes carry a three receiver set up but a three receiver ARC-5 command set would have been very atypical.  The beauty of the ARC-5 sets were that they were somewhat modular in design - one and two radio rack set ups were relatively easy to add and replace, and did not require 3 receivers to be taken out of service to replace 1 damaged radio rack.

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 Apr 19, 2023, at 6:48 PM, Mike Morrow <kk5f at earthlink.net> wrote:
> 
> 
> Unfortunately, that's a configuration that was not at all useful in military service.  The three receivers in a MT-65/ARC-5 in a single-seat carrier-based aircraft would typically have been:
>  
> 1. R-4*/ARR-2 VHF ZB-Homing, 6 Selectable MF Modulation Channels
> 2. R-25, R-26, or R-27/ARC-5, MF/HF Lock-Tuned Fixed Frequency
> 3. R-28/ARC-5 VHF 4-Channel Crystal Control
>  
> C-38*/ARC-5 is the receiver control box for ALL of the above receivers except for VHF channel selection which is performed on transmitter control box C-30A/ARC-5.
>  
> These three receivers provided VHF Homing with six MF modulation channels, one-channel of MF/HF reception, and four channels of VHF reception.  That's much more capability from three receivers than available from the earlier ARA/ATA and SCR-274-N three-receiver sets.
>  
> The R-23*/ARC-5 served no purpose on carrier-based aircraft.  In addition to aviation beacon band reception (not especially useful for aircraft operating from a carrier), it was designed with the MX-19/ARC-5 audio adapter panel to be the localizer receiver for the AN/ARN-9 Air-Track ILS system for land-based patrol aircraft.  Air Track ILS was abandoned before 1944 in favor of the far superior USAAF SCS-51 ILS (RC-103-A localizer, AN/ARN-5* glide slope).
>  
> The R-24/ARC-5 had really only one function for use with the AN/ARR-1 VHF Homing Adapter.  The more capable and compact AN/ARR-2 ZB Homing Receiver made the R-24 and the AN/ARR-1 obsolete.  It is doubtful that earlier homing combo was ever deployed.
>  
> Mike / KK5F
>  
> -----Original Message-----
> From: MARK DORNEY <mkdorney at aol.com>
> Sent: Apr 18, 2023 5:53 PM
> To: Bart Lee <bart.lee.k6vk at gmail.com>
> Cc: ARC-5 List <arc5 at mailman.qth.net>
> Subject: Re: [ARC5] Latest aquistion
> 
>  
> 3 different Navigational Receivers in a 3 Receiver rack ? Interesting. 
>  
> 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 Apr 18, 2023, at 6:48 PM, Bart Lee <bart.lee.k6vk at gmail.com> wrote:
> 
> i David, 
>  
> If Mark does not ask for the ARR-2 manual, we'd love to have it at the museum at the California Historical Radio Society (Alameda -- CHRS). We have an R-4A/ ARR-2 (see attached), and we'd like to have at least a copy of the manual.
>  
> 73 de Bart, K6VK ##
>  
>  
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