[GreenKeys] Model 28. When a key is pressed, it prints multiple times

[thomas baggio]

Hi. 

The unit decides just fine. Clear, no garble. It is just on input 

Tom

Sent from my iPhone

> On Jul 27, 2018, at 20:37, Ethan Blanton <elb at kb8ojh.net> wrote:
> 
> thomas baggio via GreenKeys wrote:
>> I had submitted this question a few months ago but never did resolve
>> the issue. 
>> 
>> Description: when a key is pressed, the teletype will sometimes print
>> the selected letter out twice or even three times.  This doesn’t
>> happen all the time, maybe every 10 th letter or so 
> 
> Does this happen only when inputting from the keyboard, or also when
> decoding signals from the loop?  (You may know this, but ...) The
> keyboard and the page printer are connected only via the current loop.
> It seems unlikely to me that the page printer would glitch in such a
> way that the clutch ran twice *and* the same character decoded twice;
> I would expect such a glitch to have either garbage, a blank, or LTRS
> on the second turn.  I suspect your keyboard is actually sending the
> character twice, and the problem is in its mechanism to prevent key
> repeat.
> 
> It's harder to see the keyboard mechanism.  Do you have anything else
> you can put in the loop to verify?
> 
> Ethan