[Milsurplus] SRR-13A - Tune up tools question

[Nick England]

Here's an SRR-12 ebay photo from 2008 (I didn't win it though)
http://www.navy-radio.com/rcvrs/images/srr12-01.jpg

I do have an FRR-22 which is the (rarer?) variant of the SRR-12 for
rack mounting & with EXT OSC input.
http://www.navy-radio.com/rcvrs/images/frr22-01.JPG
Sorry, you know the phrase about "cold dead fingers"?

Now if you're looking for rare - what about the waterproof version MRR-2
http://www.navy-radio.com/rcvrs/images/mrr2-01A.JPG
Nope, don't have this either - this photo is of s/n 1 (and only?)

But I sure would like to find an FRR-32 diversity system
http://www.navy-radio.com/rcvrs/images/frr32-01.jpg

cheers,
Nick K4NYW

On Thu, Jan 5, 2012 at 2:40 PM, Mike Morrow <kk5f at earthlink.net> wrote:
> John wrote:
>
>> I'm looking for a SRR-12 -  anyone got one they'd like to part with ?
>
> I've never seen one in more than 40 years of looking.
>
> The manual implies that there were 935 made, and that none had the mod
> that replaced five of the six 5647 vacuum tube signal diodes with 1N458
> solid-state diodes.  The manual says that was done for the AN/SRR-11
> above serial 1275 and for the AN/SRR-13A above serial 1430, makes it
> likely that there were several times as many 11 and 13A models as 12
> models.
>
> I always liked my 13A, which provided me a lot of service between
> 1970 and 1979.  My 13A is in very good condition, although some of
> the control labeling on the front panel has worn away.  I'd consider
> replacing the front panel if I had a junker that had a good unflawed
> front panel.
>
> I suppose one really should have an AN/SRT-14 to go with the
> AN/SRR-13A. :-)
>
> WRT the 12, if 935 were made, one would think they'd still be found
> once in a while.  I believe there are several list members who have
> the (somewhat useless) AN/BRR-3 (14 to 30 kHz) that provided SSBN
> submarines their main contact with the national command authority,
> 35 years ago and earlier, even though I'm sure there were far fewer
> than 935 of those ever made.
>
> WRT the replacement of the 5647 with the 1N458 for the 11 and 13A,
> the one remaining 5647 is in the AGC delay circuit.  It's hard to
> imagine why, in a fairly non-critical circuit, the 5647 would
> have remained in use.
>
> Mike / KK5F
>
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html