[Milsurplus] TRC-1 and mixed crystals in it

Sun Sep 3 13:13:33 EDT 2017

Heh!  We have TRC   think that  is on the fn now music  broadcast band! It 
is in the warehouse awaiting cleaning. trc-3  perhaps?   need to  get manual 
 and  clean it up   for the milcom display at  the museum.  there are  2  
units  to it.

Ed# wwww.smecc.org 

In a message dated 9/3/2017 9:50:08 A.M. US Mountain Standard Time,  
RAFANTINI at salisbury.edu writes:

Have been kicking around the idea of trying to do a WW2  type radio link 
between the coastal defense facility located at Fort Miles  Delaware and there 
restored plotting and control facilities to the northern  observation tower 
located across the bay in New Jersey, also a restored  observation tower 
but operated by a different group.  
They have a thing where they do not want anything that’s  not period 
correct located in the plotting room and spent many hours  rebuilding telephone 
and intercom systems and the like.  Wanted to try to do something with  radio 
and may try setting up BC-699 with phone patch and try opps on eighty  but 
would much rather something that’s more telephone friendly like a TRC-1  
system. The TRC radios are not that uncommon but the frequency range places  
them outside the Ham bands so they as originally built are useless. Perhaps I  
can modify the output tanks and input for operation in the low end of the 
two  meter band? Or maybe convert them down to six meters. Don’t have much 
concern  for them being wide band FM being they will be up in the VHF band and 
set to  an unused set of channels. The fifteen mile or so path across the 
bay won’t be  a big obstacle and beams for both six and two are common.  
If noting can be worked out with period radios they are  leaning towards 
the option of using IP Telephone extensions and having the  physical hardware 
located in another room but I would think that maybe the Mil  Radio 
community would be able to come up with something better then that. 
Anyway it’s just an idea and project that’s somewhat down  on the list 
right now but all this talk of the TRC-1 got me thinking about it  again. 
Ray F/KA3EKH 

____________________________________

From: milsurplus-bounces at mailman.qth.net  
<milsurplus-bounces at mailman.qth.net> on behalf of WA5CAB--- via  Milsurplus <milsurplus at mailman.qth.net>
Sent: Saturday,  September 2, 2017 5:40 PM
To:  milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] CY-67 / TRC-1  and mixed crystals in it  

AN/TRC-1 was the first VHF  FM radio relay or terminal set. One voice 
channel in the roughly (the manuals  are in the attic) 70-100 MC range. The 
crystals were originally in FT-241  holders, later called CR-4(*)/U. I would have 
to check the manuals but have  always assumed that the crystals were 
probably in the roughly 300-500 KC range  like those for the BC-604 and BC-684. 

The ones for the RT-12/TRC-2 and  BC-1306 would be in FT-243 holders. and 
be between 1000 and 3250  KC.

The 1- and 2-digit channel numbers between 0 and 79 are for the  BC-620. 
The 3-digit channel numbers between 270 and 389 are for the BC-659.  Holders 
should be type FT-243, or CR-6(*)/U.

The CR-8(*)/U holders are  for AN/GRC-9 and should be between 1000 and 6000 
KC.

Anything marked  CR-5(*)/U is for the BC-611.

Robert Downs - Houston
wa5cab dot com  (Web Store)
MVPA 9480

I  

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