[TMC] Why ?

[w1nzr via TMC]

A lively, erudite and enjoyable discussion.....as long as you are a radio
geek...thanks all...

Brown Beezer


Sent via the Samsung Galaxy S® 5 ACTIVE™, an AT&T 4G LTE smartphone


-------- Original message --------
From: Francesco Ledda <frledda at att.net> 
Date:12/08/2014  12:37  (GMT-05:00) 
To: Nick England <navy.radio at gmail.com> 
Cc: Mike Durff <mike at oldaudio.net>, tmc collector's group <TMC at mailman.qth.net> 
Subject: Re: [TMC] Why ? 

I think that their technology became irrilevant, and they died!

Sent from my iPhone

> On Dec 8, 2014, at 18:53, Nick England <navy.radio at gmail.com> wrote:
> 
> To add to JP's info -
> In the late 1960's, the Navy began replacing FRR-60 receivers with R-1051's
> - smaller, 95% solid state, easier to repair (quick module swapping),
> easier to operate, and common equipment for shipboard and shore station
> use. And freq synthesis compatible with the new standards for on-line
> crypto and multi-channel multiplexed RTTY. The Navy bought 1000's of these
> receivers so millions of dollars in future TMC sales (and R-390A sales)
> evaporated, with no replacement in sight. WHAM.
> 
> Around the same time, TMC lost out for the upgrade of all the Navy's big
> transmitters, replacing the URT-19/FRT-70, FRT-39, FRT-40, FRT-62 series
> (TMC SBT-1K, GPT-10K, GPT-40K, GPT-200K) with the Continental/RF
> Communications FRT-83, -84, -85, -86.
> http://www.navy-radio.com/xmtrs.htm
> These were modern synthesized autotune 4ISB rigs and the Navy bought
> hundreds and hundreds of them so more millions of dollars in future TMC
> sales evaporated, again with no replacement in sight. DOUBLE WHAM.
> 
> I was working for the Naval Electronics Systems Command in 1969-72, but
> it's not my fault, honest.....
> 
> If you are curious about Navy technology transition during the 1970's, I
> have 1974 equipment inventories for several Navy comm stations at
> http://www.navy-radio.com/commsta-rcvr-01.htm
> http://www.navy-radio.com/commsta-xmtr-01.htm
> 
> Nick England K4NYW
> www.navy-radio.com
> 
>> On Mon, Dec 8, 2014 at 11:18 AM, John Poulton <jp at cs.unc.edu> wrote:
>> 
>> Mike poses a useful question, and it's essentially my job to answer
>> it.  I've been assembling information for a comprehensive history of
>> TMC for some time, but just haven't (yet) had the time and energy to
>> arrange it into an actual document.  I still have a few hours of
>> interviews to transcribe, and lots of written material to organize,
>> but ... those are excuses!
>> 
>> That said, if anyone on the list has information, stories, theories,
>> ...whatever.. to contribute to this effort, please do!
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