[TMC] A sort of test message

[Richard Knoppow]

     Thank you John and Larry,   I've wanted a GRT-750 for a long time 
but will probably never have one.   For one thing I have a bad back and 
would have trouble pushing it around:-)
On 2/1/2015 9:18 AM, John Poulton wrote:
> Richard,
>
> That would be the GPT-750B.  TMC evidently made quite a few of them. 
> You can, for example, see the production line in the mid-fifties in 
> the photo
>
> http://tmchistory.org/tmc_history/photos/tmc_people/tony_faiola_gpt750.jpg
>
> in which a young Tony Faiola is leaning over one of the transmitters 
> on the production line.  Tony told me that these things were selling 
> "like hotcakes" at the time, so much so that TMC had to built an 
> entire new plant on Waverly Ave in Mamaroneck to handle the production 
> of these and the newer SBT-1K's, GPT-10K/40k/200K units in 1956.
>
> The transmitters in the photos are GPT-750B-1's.  Most of the 
> GPT-750's that are now in collectors' hands are -2's, the later 
> production.  The -2 version mainly involved the re-engineering of the 
> cabinet, because the heavy plate transformer was causing the -1 
> cabinets to bend/deform during shipping.  The transformer is indeed a 
> heavy beast.  The -2 cabinet is the proverbial brick outhouse.
>
> Evidently TMC sold a great number of the AM versions of the GPT-750 to 
> AT&T, where they were used in ship-to-shore telephone service.  These 
> were later surplussed, but AT&T must have been extremely diligent 
> about scrapping them, as I've only ever heard of one of these units 
> having made it to a private collection.  In nearly 20 years of TMC 
> collecting I've only ever seen one of the modulators, and it's sitting 
> in my shack.. :)  There may be a couple/three of these things still 
> left on what's left of the Greenland Ice Sheet.. another story!
>
> Richard:  if you're seriously interested in a GPT-750, please get in 
> touch.  I know where there is one for sale here in NC. It's a "D" 
> model (RTTY), probably ex-FBI, but it would not be difficult to 
> convert it to SSB service.
>
> 73, John K4OZY
>
> On Sun, Feb 1, 2015 at 12:48 AM, Richard Knoppow 
> <1oldlens1 at ix.netcom.com <mailto:1oldlens1 at ix.netcom.com>> wrote:
>
>       I am setting up the mail filters in a new computer and need a
>     message from this list.  I have little TMC stuff to contribute but
>     wonder if anyone on the list has the AM version of the GPT-750.  I
>     don't remember the letter designation.  There is a handbook for it
>     and I think its plate modulated.  I am curious about the
>     performance and if any are actually on the air.
>       I have dreamed for years of having the SSB version of the
>     GPT-750 but have never even seen one in the flesh. At the moment I
>     don't have space for one even if it was given to me (but, of
>     course, if that happened I would try to find a place).
>
>
>     --
>     Richard Knoppow
>     Los Angeles
>     WB6KBL
>     dickburk at ix.netcom.com <mailto:dickburk at ix.netcom.com>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL