[GreenKeys] 28ASR Locked Keyboard

[John, W9DDD]

Page 42 of:
http://www.navy-radio.com/manuals/tty/573-117-700-6501.pdf
has a good picture and the adjustment to disable.

---
----
The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 6/17/2021 6:20 AM, John, W9DDD wrote:
> Good morning,
> 
> Yes, you have the Synchronous Pulsed Transmission modification kit.  I 
> had that on a KSR keyboard.
> 
> Look in 573-117-800 
> (http://www.navy-radio.com/manuals/tty/573-117-800-7009.pdf) on page 35. 
> There is part number 193654 on the right side of the page. That is 
> supposed to be able to disable the feature by rotating it.  I don't 
> remember in which direction.
> 
> ---
> ----
> The above comments or recommendations are SWAG. Use at your own risk.
> John, W9DDD
> 
> On 6/17/2021 1:11 AM, Robert Goff wrote:
>> Hi,
>> I've been working on a 28ASR, which is in excellent cosmetic
>> condition, but has a few bugs still to work out. Most obvious of
>> these-you can't type on the keyboard.
>>
>> Hunting around I found a solenoid behind the character counter.  If I
>> hold down the armature the keys move freely, but let it go and I can
>> type exactly one character. Could not find the solenoid in any of my
>> drawings, it doesn't look like the lock switch shown in the manual.
>>
>> Someone told me that machines used with crypto equipment needed a sync
>> pulse to unlock something after each character.  Maybe that's what
>> going on here?  Anybody run into this before? The perforator base is
>> marked TT-433, so at least that and the reperforator are military.
>>
>> Thanks,
>> Robert
>> W7MKA
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