[GreenKeys] KLINSCHMIT TT-117 WIRING HELP

Wed Dec 6 12:28:26 EST 2017

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> 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> 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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