[Milsurplus] is that an oscillator I hear whining?!

Thu, 5 Dec 2002 20:05:27 -0600

I believe that the URR-13 and URR-27 are from National as well.

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of William Donzelli
Sent: Thursday, December 05, 2002 7:44 PM
To: Francesco Ledda
Cc: [email protected]
Subject: RE: [Milsurplus] is that an oscillator I hear whining?!

> The URR-13 and URR-27 (UHF and VHF) were designed to minimize the
radiation
> of RF from the LO.  These radios were extensively used on US submarines
> during and after WW II.

I do not think these were available until the late 1940s. For VHF on
subs, I think they used AN/ARC-4s and SCR-624s. By 1950, however, the
URRs were all over the place.

Speaking of which...

In the stack of '-13s, '-27s, and '-35s here, I have one oddball - a
National set called AN/URR-28(XN-3). I suspect this was perhaps a
competitor to the '-27, and lost the fight. I know this may be a long
shot, but does anyone have any information about this set?

William Donzelli
[email protected]
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