[GreenKeys] Kielschimdt TT-98

[Duncan Brown]

David,

The Kleinschmidt TT-98 series is a "second generation"  to the Teletype 
Corp. Model 15/19.

The selector magnet is like a polar relay, in that it has a separate 
bias winding.  This makes the TT-98 line input polarity sensitive. But 
if the machine is running closed, you have the polarity correct. (Does 
it run open when the converter is off?)

On the gold box behind the selector magnet there is a mode switch: TEST 
/ 60ma / 20 ma.  Does the machine run normally in the TEST mode?

On the gold box, there is a place for checking & setting the bias.  On 
the chassis, near the gold box, there is a 1/16 A fuse, which I think is 
for the bias.

Do  you have the manuals?  They can be downloaded at 
https://rattrig.com/manuals/tm's.htm  (While you are at 
https://rattrig.com, look around the rest of the site to sees how this 
equipment was used.)

Starting about 1950, the US Army Signal Corps only bought Kleinschmidt 
equipment.  I spent 1967 in Viet Nam maintaining them. Now I keep them 
running at the Antique Wireless Museum.

Good luck & have fun,

Duncan Brown, K2OEQ
USASA    31J30

i-Telex: 212503

Antique Wireless Assoc. Museum,
   Asst. Curator, Commercial Equipment
(also chief TTY op & repairman)

www.antiquewireless.org



On 09-Feb-23 14:09, David Potter wrote:
> Has anyone used a klienschimdt teletype?
> I'm currently using a IRL FSK500 converter and works good on my other 
> teletype machines.
> Model 14 and 19. On the klienschimdt the selector magnet just pulls 
> in. I got the 60 ma current loop set right.
> The selector magnet looks different on this machine then the model 19 
> and 14.
> Any ideas?
>
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