[R-1051] R-1051 module identification

[Francesco Ledda]

Nick,  I have never seen of the 100CPS conversion for the WRR2A.  Can you
share more on this subject?

BR,

Ffrancesco

-----Original Message-----
From: R-1051 [mailto:r-1051-bounces at mailman.qth.net] On Behalf Of Nick
England
Sent: Monday, October 27, 2014 12:25 PM
To: R-1051 Discussion Group
Subject: Re: [R-1051] R-1051 module identification

The A model was manufactured by Elmer-Montedel in Italy.
Here's an internal photo - I can't find one of the front panel any more
http://www.radiomuseum.org/forumdata/users/6435/mil_R-1051/Fig2_a.jpg
and here's the A six-pack showing the 100Hz module
http://www.radiomuseum.org/forumdata/users/6435/mil_R-1051/Fig5_a.jpg

The original R-1051(plain) was manufactured in 3 runs so you will see serial
numbers staring with A, B, or C. There are some minor differences but all of
these were 500cps units - I have seen no evidence of a field or depot
conversion of these to 100cps. If you have a R-1051(plain) with a 100cps
conversion please send me a photo - I'll be happy to learn something new!

A new run of R-1051B contained the 100cps steps. This changeover to 100cps
channels was made on several pieces of USN HF gear, including the URC-32 to
URC-32B and the WRR-2 to WRR-2A.

The R-1051C model is the black face USAF version, otherwise same as the B.

Nick England K4NYW
www.navy-radio.com

On Mon, Oct 27, 2014 at 12:26 PM, David Wise <David_Wise at phoenix.com> wrote:

> The no-suffix R-1051 is 500Hz.  The R-1051A (Air Force?) and B (Navy?) 
> went to 100Hz steps.
>
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