[Milsurplus] WRR-2 Variants?

[Nick England]

 AN/WRR-2 has 1.0 kc tuning, manufactured by National
    RF CV-920/URR + IF/AF AM-2477/URR
    manual NAVSHIPS 93550(A)

AN/WRR-2A has 0.5 kc tuning, manufactured by National
    RF CV-920A/URR + IF/AF AM-2477A/URR
    manual NAVSHIPS 94715, renumbered to NAVSEA 0967-LP-137-3010

AN/WRR-2B has 0.5 kc tuning, manufactured by Arvin
    RF CV-920B/URR + IF/AF AM-2477B/URR
    manual NAVSHIPS 94715, renumbered to NAVSEA 0967-LP-137-3010
There was a change in the B version to improve the frequency response of
audio filters FL1801 and FL1802 - that info is in change T-3 to 94715
(0967-137-3013)

All models have continuous tuning - it is just whether the Wadley loop
synthesized mode locks at 1.0 kc or 0.5kc increments.

n.b. rack mount AN/FRR-59() and shelf mount AN/WRR-2() differ only by the
cabinet mounting.


Nick England K4NYW
www.navy-radio.com


On Thu, Oct 10, 2019 at 1:25 AM Robert Goff <robert.h.goff at gmail.com> wrote:

> I'm looking for information on the differences between the WRR-2, 2A and
> 2B.
>
> I see that manuals covering the latter two versions are available from
> several sources in both electronic and paper format. I believe one is
> Navships 94715.
>
> I have a WRR-2 (plain) which I would like to get going, so I'm
> naturally curious about the differences between the different
> contracts.
>
> Anybody know?
> Thanks,
> Robert
> W7MKA
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