[GreenKeys] Teletype 28

[Greg Putrich]

> Now that the problem seems to be narrowed down to 3rd pulse, can you 
> check to see if either the code bar immediately above or below are 
> interfering with the code bar for the 3rd pulse.
>  
> Here is a quick test that might help find out...
>  
> Line Feed is 2nd pulse only...
>  
> Carriage Return is 4th pulse only...

Both LF & CR work fine.


> See if it makes a difference if you type ( or make a paper tape) of 
> the alternating sequence of the letter O then LF then O then LF... or 
> O then CR then O then CR.

The CR clears it up (for a short time). Haven't tried just O & LF 
yet... will try that.

It seems to be worse when the typebox is on the right half of the 
carriage. It still can happen on the left half, but is not likely.

 
> Hopefully, this will help pin down the problem a little further.   I 
> saw a similar problem where there was a slight interference between 
> two code bars, causing the gain of a pulse...

I'll take a close look at them.