[Milsurplus] AN/URT-18 transmitter??

[Jim Whartenby]

Hi John
I have not heard of this one either.
Looking through the Collins Collector Association site, I found no mention of it 
in the 1959 Catalog index, PTO specifications or Mechanical Filter 
specifications.  Does it have the same type of dust cover with the toggle snaps 
and / or Collins style sub assemblies?  My only suggestion is to down load the 
KWT-6 Components catalog at:

http://collinsradio.org/archives/manuals/KWT-6_Components.pdf

and see if any of the modules used in the GRR-13 are mentioned.  Perhaps your 
set is another one of a kind Collins production unit that saw limited use or was 
succeeded by another set from a different manufacturer?

In looking through the 1959 catalog, I did see mention of the 310U exciter which 
is a possible answer to Nick's question about what exciter was used with the 
URT-18.
Just another piece in the puzzle,
Jim


----- Original Message ----
From: John Vendely <jvendely at cfl.rr.com>
To: milsurplus at mailman.qth.net
Sent: Sat, November 13, 2010 9:45:05 AM
Subject: Re: [Milsurplus] AN/URT-18 transmitter??

Is anyone familiar with the AN/GRR-13 receiver, another fixed-station 
ARC-58/KWT-6 family derivative, though somewhat different from the 310F-6 
discussed below.  Back in 1980, I acquired a bunch of GRR-13 stuff, probably 
enough for at least one receiver with spares left over.  I'd love to restore it, 
but have rarely even seen mention of it, let alone schematics for it.  It's been 
on the back burner all these years for lack of documentation.  Does anyone have 
a line on manuals for it?

73,

John K9WT

On 11/10/2010 4:40 PM, Jim Whartenby wrote:
> Hi Nick
> The 310F-6 is a manually tuned receiver / exciter which uses the same modules 
>as
> the KWT-6.  The autotuned version is the 310F-1 which is essentially an ARC-58
> repackaged with a motor-generator producing the 115vac 400~ needed for
> autotune.  Both are listed in the document below along with several other
> variants.  If you leave off the HVPS and PA of a KWT-6 you then have the 
>310F-6.
>
> http://www.collinsradio.org/archives/manuals/KWT-6_Components.pdf
>
> Regards,
> Jim
>
> ----- Original Message ----
> From: Nick England<navy.radio at gmail.com>
> To: navy.radio at gmail.com; Military Surplus Mail List
> <milsurplus at mailman.qth.net>
> Sent: Wed, November 10, 2010 12:32:15 PM
> Subject: [Milsurplus] AN/URT-18 transmitter??
>
> The AN/URT-18 HF transmitter comprises an exciter plus 2.5 kw linear 
amplifier.
> The amplifier is an AM-2374/URT (Collins 204F-1)
> So what is the exciter nomenclature? - it has some common components
> with AN/URC-32 is the only clue I have.
> Was this transmitter used by the Navy?
> cheers,
> Nick K4NYW
> www.navy-radio.com