[GreenKeys] Teletype M12 KSR owners
Gerry Block
gblock at sbcglobal.net
Mon Jan 26 10:31:19 EST 2015
Mine looks to be in working condition but haven't turned it on.
Gerry
On Friday, January 23, 2015 8:35 PM, Ed Sharpe Archivist for SMECC via GreenKeys <greenkeys at mailman.qth.net> wrote:
Remember SMECC has these... I donated my collection of them and Jim Haynes had scanned some ... we are still looking more but you will find some model 12 stuff in the mix here.
What a great resource these are... if you have any of the missing issues let us borrow them to scan or you can scan and send files and all can use the publications!
SMECC is of course interested in obtaining model 12 for the collection here too.
Thanks Ed Sharpe Archivist for SMECC
ARTS - Amateur Radio Teletype Society
History and Bulletins
>From the Jim Haynes and Red Wilson collections at SMECC
Bulletins
9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30-31
32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50-51
52 53 54 b-1488 Intro
Reprint early bulletins printed on tty paper
>Resource page in the rtty_ratt_radio_teletype sub area of the Teleprinter section on SMECC
http://www.smecc.org/rtty_ratt_radio_teletype.htm
In a message dated 1/23/2015 7:18:54 P.M. US Mountain Standard Time,
ka2wft at arrl.net writes:
My M12, sadly, is not running. The individual components are
>functional,
i.e. I can power up the motors on the keyboard and the
>printer and they
run and they are mechanically complete, but the machine
>as a whole does
not run. I acquired my machine in the early 90s from an
>older local
ham when he was downsizing and he had completely rewired the
>machine to
work with a tube keyer to minimize the RFI when using it on
>the air.
The keyer was not operating, there were no schematics, etc.
>He had
completely rewired the table to work with the keyer ... and had
>done
things like wire the power leads to the printer and keyboard motors
>with
20 AWG wire!!
>
>I removed all of his wiring and have tried to get it back
to original,
>yet all I get on the machine are random characters. The
keyboard works
>as I can drop it into the local loop here and can type on
it just fine
>to the other machines in the collection.
>
>I am fighting
a number of variables: the condition of the contacts on
>the table and the
keyboard and printer, the contact block on the table
>is cracked and needs
to be glued or epoxied back together, and the
>keyboard itself has been
completely rewired at one time and the last
>time I spent some time with
the project I had come to the conclusion
>that contact wiring on the
keyboard doesn't match a schematic that I
>have for the M12
keyboard.
>
>When I first got the machine I set it up on the kitchen table
one
>evening and hooked it up with every clip lead I own and managed to be
>able to type on the keyboard and have it print on the printer. I
recall
>that I couldn't type at full speed on the keyboard and have the
printer
>follow accurately and all of the machinery made a tremendous
racket, as
>well as the electrical part of it creating a ton of RFI.
So I know it
>*should* work, but that table wiring is proving to be elusive
for
>something that should be relatively simple. And of course there
is
>never enough time for all of the projects.
>
>I do have the cover
for the machine. I will try to get some photos and
>measurements of
it. I believe Don needs that information as well and I
>think I
promised him that a long time ago :redface:
>
>I haven't been to the AWA
museum yet. It's been a "gee, we should do
>that sometime" item for a
local ham radio buddy and me for some time
>now, but we haven't managed to
do it.
>
>Oh, and yes, you do need a separate DC supply to run the
selector
>magnets in the printer.
>
>73,
>
>Doug,
KA2WFT
>
>
>On 1/23/2015 8:51 PM, Duncan Brown wrote:
>> Doug
Alderdice
>> Steve Ripper
>> Gerry Block
>>
>> Is your M12
working??
>>
>> I'm looking a the M12 schematic, fig 2.2a1, in
Kretzman's RTTY Handbook.
>> Am I correct that you need a separate
110VDC, _260 ma_ supply just for
>> the selector magnets (separate from
the loop supply)?
>>
>> The unit we have has a new terminal strip
with new wiring and about the
>> right number of terminals, so I am
assuming (hoping!) it is wired
>> similar to fig 2.2a1. (unit is at the
Museum, so I won't get to play
>> with it again until
Tuesday.)
>>
>> What holds the paper roll? Is it mounted on the
cover? (I don't have the
>> cover.) There was a sheet-metal
u-bracket mounted to the inside of the
>> table. It was falling
off, so I removed it. But now I am thinking
>> maybe its purpose
was to hold the paper roll! (I think that I can
>> "borrow" a
bracket from a M26.)
>>
>> Doug - we are practically
neighbors! Have you ever been to the AWA
>> Museum?? We have
lots of TTYs (besides wireless equipment). Come over
>> some time
& I give you a personal tour!
>>
>> Thanks & have
fun,
>>
>> Duncan Brown, K2OEQ
>> USASA
31J30
>>
>> Antique Wireless Association Museum Asst. Curator,
Commercial Equipment
>> (also Chief TTY operator & repairman)
>>
http://www.antiquewireless.org/
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