[GreenKeys] Whazzit? Normal Input Keying (NIK)

[Duncan Brown]

Nick,

Never heard of "NIK" in the Army.  Our KLI equipment connected to KW-7s 
with "low level keying". As I remember, it was a 50uA current loop and 
unidirectional (not polar). The KLI keyboards and tape readers had both 
Mark & Space contacts, but the Space contacts were never used, even with 
the KW-7.


Jim,

The stepping contacts you are talking about are for an older crypto 
system than the KW-7 & KW-26.  I was a Army TTY repairman in 1967.  I 
remember seeing the stepping control terminals on the TT-76 tape reader, 
but never saw them used.  Possibly some of the early TTY crypto gear 
could not handle 60wpm, so the tape reading speed was put under the 
control of the encryption equipment?

Do you remember what crypto gear was being used with the stepping 
control??  (KL-7 ??)

Have fun,

Duncan Brown, K2OEQ
USASA  31J30

Antique Wireless Association Museum Asst. Curator, Commercial Equipment
(also Chief TTY operator & repairman)
http://www.antiquewireless.org/


On 23-Sep-16 16:44, Nick England wrote:
> I have come across some Navy manuals on modifying M28 equipment for 
> Normal Input Keying (NIK) for connections to crypto gear. NIK was new 
> to me.
>
> The only definition I have found is:
> normal input keying (A)
> Low level keying in which battery to the teletypewriter keying
> contacts is provided by the cryptoequipment.
>
> So it seems that this is a variant of low-level signaling where the 
> keying contacts in a TD or keyboard are handling some low current 
> unipolar signal direct to the crypto gadget (KW-7, KW-26).
>
> I understand standard low-level signaling was differential bipolar +/- 6v.
>
> Comments and/or Clarifications ??
>
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to duncanancy at earthlink.net


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus