[MRCA] URC-35’s

[Tim]

Hi Mike - The West Coast minesweeps had URC-35's as well.  My ship (USS
Gallant, MSO 489) had 2 of them.  I don't recall them having reliability
issues.  Circa 1984-86....
Tim
N6CC

On Sun, Jul 17, 2022 at 1:25 PM Mike Morrow <kk5f at earthlink.net> wrote:

> When I was living In the Charleston SC navy base BOQ in 1978-79, I parked
> near the piers for the ocean-going minesweepers (MSO).  I saw several
> AN/URC-35 sets sitting unused for weeks on those piers.
>
>
>
> The set consisted of the RT-618*/URC receiver-exciter with an output power
> of 0.1 watts.  That got its power through the AM-3007/URC 100 watt power
> amplifier mounted on top of the RT-618.
>
>
>
> I have an RT-618B/URC that I bought for a few dollars at Dayton in 1996.
> I turned down the AM-3007A.  The RT-618 was worth the money just as a
> magnificently complex conversation piece.
>
>
>
> On my SSBN we had some combos of the R-1051*, T-827*, and AM-3007* with a
> system nomenclature of AN/BRC-?? that I now forget.  We had no RT-618s.  At
> one time I would have loved to own that set for MARS, but by 1982 new ham
> rigs like the Kewwood TS-430S were far more capable, easier to tune and
> store frequencies, operate split frequencies, transmitted 1.6 to 30 MHz and
> received down below the important 500 kHz maritime Morse band, covered all
> modes including AM and FM, had four crystal IF filters 0.27 to 6 kHz BW,
> and was only a few percent of the bulk and weight and power consumption.
> No contest!  :-)
>
>
>
> FWIW the CU-937 has always been very difficult to find.
>
>
>
> Mike / KK5F
>
>
> -----Original Message-----
> From: Glenn Little WB4UIV <glennmaillist at bellsouth.net>
> Sent: Jul 17, 2022 1:12 PM
> To: <mrca at mailman.qth.net>
> Subject: Re: [MRCA] URC-35’s
>
>
>
> When I was in Navy MARS, I was assigned to the 6th ND directors office.
>
> Each director was issued at least one of these, new in box.
>
> I uncrated it and used it for voice communications.
>
> Being curious, I requested additional information on this set.
>
> I wound up in communications with one of the designers of this set whos
> mother also used one for Navy MARS.
>
> He said that the radio was very unreliable due to the heat density that
> was a result of the design specs from the Navy.
>
> He said to cool the radio for long term use you had to drill a lot of
> cooling holes in the amplifier cabinet.
>
> The radio was never deployed on war ships, IIRC, it was only used on
> auxiliaries such as tug boats.
>
> The radio id basically a R-1051 and a low power T-827 in the same box.
>
> IIRC, the RT puts out 10 or 100 mW to drive the amplifier.
>
> The amplifier cabinet contains a 100W PA and the power supply.
>
>
>
> I cannot locate my manual now, but, Artekmanuals.com has a very good scan
> of my manual for $17.50, this is two volumes for AN/URC-35B.
>
>
>
> The radio is probably as good as a R-1051/T-827 combination when used at
> low power.
>
> I would NOT use this radio for RTTY or other digital modes.
>
>
>
> Many modules are the same as R-1051 and T-827 modules.
>
>
>
> 73
>
> Glenn
>
> WB4UIV
>
>
>
> On 7/17/2022 1:37 PM, Thomas Chirhart wrote:
>
> > Anyone else have this set? It consists of the RT618B/URR and AM3007A/URT
>
> > I just picked up a nice one up with all cables, microphone and manuals.
>
> > Does anyone have the CU937 coupler?
>
> > I remember the WRC-1 from my Navy Radioman days..
>
> > 73
>
> > Tom
>
> > K4NCG
> ______________________________________________________________
> MRCA mailing list
> Home: http://mailman.qth.net/mailman/listinfo/mrca
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:MRCA at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/mrca/attachments/20220717/14ba2a59/attachment.html>