[GreenKeys] KLINSCHMIT TT-117 WIRING HELP
Duncan Brown
duncanancy at earthlink.net
Wed Dec 6 20:59:19 EST 2017
I think the way it works is that there is a contact actuated by the
keyboard that operates the solenoid each time a key is pressed. The flat
lever needs to be in the right position, also (the manual is not too
clear and I don't have the unit at home to look at)
I'll try to get the TT-117A circuit diagram & some text scanned tonight
or tomorrow AM and send it out.
Duncan
K2OEQ
On 06-Dec-17 18:10, Albert Last wrote:
> Humm... okay, Steve. I was thinking that on the first mark bit, the
> shaft would key the solenoid stopping the keyboard, which would open
> the spring switch killing further pulses until the next key stroke on
> keyboard. The spring switch is located on back side of keyboard.
> multiple unused sections for possible use my me.
>
> Thanks again, Al
>
>
> On Wednesday, December 6, 2017 2:21 PM, Steve Garrison
> <steve.n4tty at gmail.com> wrote:
>
>
> Albert,
> The solenoid doesn't go into the loop. As I remember it, the solenoid
> was to prevent the keyboard from sending to the loop.
> Just how I remember it. Otherwise the solenoid would try to follow
> all the mark and space bits which wouldn't be very practical.
> Steve G./N4TTY
> *From:*greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] *On Behalf Of *Albert Last
> *Sent:* Wednesday, December 06, 2017 4:57 PM
> *To:* Duncan Brown
> *Cc:* Green Keys
> *Subject:* Re: [GreenKeys] KLINSCHMIT TT-117 WIRING HELP
> Hi Duncan,
> My cover says 117A but as you say, covers can change.... My keyboard
> has one solenoid and the flat lever. I've started removing parts and
> following wiring around. Will wait for your scan to further see how
> close we come. Sadly, your 115v info at 1/4 amp is more current than I
> was hoping for. I wanted to series solenoid into loop for a reset
> operation. We'll see.
> Thanks for your scan ahead of time.
> Al
> On Wednesday, December 6, 2017 9:28 AM, Duncan Brown
> <duncanancy at earthlink.net <mailto:duncanancy at earthlink.net>> wrote:
> Al,
>
> I have the AN/FGC-25 manual that covers your TT-117. But to add to the
> confusion, there are differences in the keyboard control circuitry
> between the TT-117 and the TT-117A, including changing reference
> designators! ! And you cannot always be sure which model you have
> from the nameplate on the cover, because covers did not always go back
> onto the correct unit in a maintenance shop!
>
> Does your keyboard have two solenoids (TT-117) or one solenoid and a
> big flat lever (Keyboard Control Lever) sticking out in the middle top
> of the keyboard (TT-177A)? Let me know which model you have and I can
> scan the schematic for that version.
>
> The short answer is that the keyboard solenoid requires 115VDC at
> about 1/4 amp (3/4 A fuse) through a set of contacts on the keyboard
> somewhere and the Keyboard Control Lever must be in position to allow
> keyboard contact cams to rotate for serial operation.
>
> Duncan
> K2OEQ
>
> On 04-Dec-17 13:31, Albert Last wrote:
>
> Back again. Removed solenoid and found 700 ohms in solenoid in
> series with 500 ohm fixed resistor switched in series with
> solenoid. will reinstall solenoid in keyboard and ck ckt.
> Question: can I put this series look in series with keyboard and
> 60 ma loop from HAL ST-6 ?
> Al
> On Monday, December 4, 2017 9:05 AM, Albert Last
> <al.last at sbcglobal.net> <mailto:al.last at sbcglobal.net> wrote:
> Hi Duncan, Thanks for your input. I only have the TT-117. So
> without the Reperf I guess is a major problem. I did remove the
> keyboard and found that the solenoid that controls the lever to
> stop the unit from turning is open. Infinite open. So regardless
> of reperf or not the coil bad. Oh well....
> Thanks all, Al w6gsq
> On Sunday, December 3, 2017 12:21 PM, Duncan Brown
> <duncanancy at earthlink.net> <mailto:duncanancy at earthlink.net> wrote:
> Al,
> The TT-117 was the page printer half of the AN/FGC-25. The other half
> was the TT-178/9: reperf, tape reader and power supply. Do you have
> both units or just the page printer?
>
> We have an AN/FGC-68 (weather version of the FGC-25) at the AWA
> Museum
> with a bad power supply and the TT-117 keyboard will not work without
> the power from the reperf unit.
>
> One of the "features" of the AN/FGC-25 was that you could punch
> tape as
> fast as you could type. There was a special mode for a parallel
> connection from the keyboard to the reperf, instead of normal serial
> connection. It sounds like that circuitry is what is preventing the
> keyboard from sending serially.
>
> Robert Downs on this list sells manuals and may be able to get you a
> scan of the FGC-25 maintenance manual, TM 11-5815-244-35. (I think
> I got
> his last paper manual). I have the maintenance manual at the
> Museum and
> I can bring it home on Tuesday and scan the schematic.
>
> The operator's & low level maintenance manual for the FGC-25 is TM
> 11-5815-244-12 and is available on Google Books.
>
> Have fun & good luck,
>
> Duncan Brown, K2OEQ
> USASA 31J30
>
> Antique Wireless Association Museum Asst. Curator, Commercial
> Equipment
> (also Chief TTY operator & repairman)
> http://www.antiquewireless.org/
>
> On 03-Dec-17 11:47, Al.Last at sbcglobal.net
> <mailto:Al.Last at sbcglobal.net> wrote:
> >
> > I have been working on my Klienschmit TT-117 tty for the past year.
> > Special thanks to Steve N4TTY for providing me the main drive shaft
> > WITH the gears. I could never have gotten past first base. I now
> have
> > one remaining problem that some one of you might have knowledge to
> > help me finish this project. My TT-117 is the version that came
> from a
> > Crypto system.. It has the red light on the front housing; a 1"
> > diameter 18" long cable/connector hanging from left side; the
> typing
> > 70 something levers that flip up to remember the key strokes (???);
> > the keyboard rotating disk with a knife lever that stops the
> rotation
> > once a key stroke occurs (normal knife has two ends - mine has only
> > the start side ). Now the problem....... the unit keeps
> rotating. It
> > is suppose to stop after it rotates once and wait for the next
> > keyboard selection. There is a solenoid ???? round module directly
> > behind the kyboard that has a flat lever which trips the
> run/stop on
> > the front right. This lever appears to stop rotation waiting.
> The two
> > wires from the round module runs to the horizontal sliding red
> arrow
> > that runs across the faceplate. I DO NOT HAVE ANY INFORMATION on
> this
> > final problem(s). I don't see any source to activate solenoid?
> >
> > Sorry for this long email, but after 1 years labor, your input
> could
> > save me hours of interpurlating.
> > Al W6GSQ
> >
> >
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