[ARC5] C-43/ARC-5 - Correction!!

[jcoward5452 at aol.com]

Thanks Mike for all the good info.Also on the auction block is a 
C-38A/ARC-5.This one has no covers over REC. B switch,associated SET 
FOR MAXIMUM TOLERABLE NOISE control, or the MIC selector switch as does 
my C-38/ARC-5 box here.Are these covers the difference between a -38 
and a -38A ?
  For those who track these things mine is contract NXsa-38868,s/n 833 
CCT.
 Thanks,
            Jay


-----Original Message-----
From: Mike Morrow <kk5f at earthlink.net>
To: jcoward5452 at aol.com; arc5 at mailman.qth.net
Sent: Mon, Oct 19, 2009 7:07 am
Subject: Re: [ARC5] C-43/ARC-5 - Correction!!



I wrote:

>Western Electric developed and manufactured the VHF command set for the
>SCR-274-N, but it was not accepted by the Army beyond the evaluation 
level.
>The Navy accepted the design with some modifications, especially in the
>transmitter modulator design.  The modified BC-950 VHF transmitter 
became
>the T-23/ARC-5.  The BC-942 VHF receiver became the R-28/ARC-5, and the
>BC-938 control box became the C-43/ARC-5.

I was incorrect identifying the BC-938 as the immediate ancester of the
C-43/ARC-5.  It should have been instead identified as the BC-944.  Mike
Hanz discusses it at:

http://aafradio.org/flightdeck/arc5-3.htm

The BC-938 was, IIRC, the immediate ancester to the short-lived 
C-30/ARC-5
pushbutton VHF and MF/HF transmitter control box, which was replaced by
the very different, much improved, C-30A/ARC-5 selector switch control 
box.

I know little about the VHF SCR-274-N, but here is my list of 
corresponding
components:

BC-938 became the C-30/ARC-5 VHF and MF/HF transmitter control
BC-942 became the R-28/ARC-5 VHF receiver
BC-944 became the C-43/ARC-5 VHF and LF/MF/HF receiver control
BC-950 became with modification the T-23/ARC-5 VHF transmitter.

Are there other VHF SCR-274-N components?  For example, there is a
C-42/ARC-5 for the R-28, but I do not know if there was an SCR-274-N
equivalent.

Mike / KK5F