[GreenKeys] M28ASR wiring

[Nick England]

And the military, of course, had to redraw things using TBxx, Jxx, Pxx,
etc. but that correspondence is relatively easy to decode.
Here’s the UGC-6 version.
https://www.navy-radio.com/tty/asr/ugc6-schem-01.pdf


On Fri, Apr 7, 2023 at 6:04 PM Nick England <navy.radio at gmail.com> wrote:

> I generally like the ones that say something like:
> 28ASR with LESU13
> 115vac circuits at top. Loop circuits at bottom.
> The terminals at rear are Cxx. This is not a very good scan but I am on my
> phone and searching is hard. More later.
> https://www.navy-radio.com/manuals/tty/jh/ttyman9/drawings/m28-13.pdf
>
>
> It depends on the LESU of course, but loop terminals are almost always the
> same C
>
> On Fri, Apr 7, 2023 at 2:59 PM Duncan Brown <duncanancy at earthlink.net>
> wrote:
>
>> Jeffery,
>>
>> Thanks, but I l have that document and it is very hard to follow.
>>
>> I did find some schematics at
>> http://rtty.com/development/teletype/model28ASR/index.html which look
>> more helpful. (although there are rfreferences to "Notes" which are not
>> there.)
>>
>> Duncan
>> K2OEQ
>>
>>
>>
>> On 07-Apr-23 14:50, Jeffrey Golas wrote:
>>
>> I got you fam!
>>
>> navy-radio.com <https://www.navy-radio.com/manuals/tty/wd/ugc48a-wd.pdf>
>> <https://www.navy-radio.com/manuals/tty/wd/ugc48a-wd.pdf>
>> <https://www.navy-radio.com/manuals/tty/wd/ugc48a-wd.pdf>
>>
>> Jeff KC3GJX
>>
>>
>> On Apr 7, 2023, at 2:24 PM, Duncan Brown <duncanancy at earthlink.net>
>> <duncanancy at earthlink.net> wrote:
>>
>>  I'm trying to set up a M28ASR and I need to find the rear terminal
>> strip connections for the printer, keyboard, tape reader and aux reperf.
>> The unit was from a civilian installation, but is referred to as a "UGC-6"
>> on the patch panel.
>>
>> I've tried to find a basic connection diagram from the documentation on
>> Nick's site, but as Nick once said:
>>
>> *"Sometimes I think the Teletype publications group was run like a
>> super-secret govt project - each group wrote about its own little piece,
>> but no one knew how it all got connected together.......except for the
>> document package shipped with each machine which was always discarded
>> within two weeks."*
>>
>>
>> Can someone just give me the rear panel terminal strip connections for
>> the i/o's to/from the cabinet?
>>
>> I will be wiring everything on separate loops.  When I switch from "LINE"
>> to "TEST", does everything get put into the one local loop?
>>
>> Thanks,
>>
>> Duncan
>> K2OEQ
>>
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> --
> Nick England K4NYW
> www.navy-radio.com
>
-- 
Nick England K4NYW
www.navy-radio.com
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