[GreenKeys] 28 stunt box oddity

[Nick England]

Thanks for all the helpful replies. It is great to have you experienced,
knowledgeable folks to fall back on.

My theory about there being a broken tine on the stunt box function bar was
CORRECT!

While I had the typing unit out to adjust gearshift backlash, I flipped it
over and could see that the stunt box BELL function bar was indeed missing
a tine for bit 3, so it would be selected for both FIGS-S (bell) and FIGS-E
(3). This is a NOS AN/UGC-77 typing unit never put into regular service so
presumably this was a factory error or something that failed very early in
my testing.

For now I have tied off the function bar to disable it - sometime before
next December I'll get around to pulling the stunt box and replacing the
function bar. Otherwise I won't be able to play Jingle Bells.....

best regards & thanks again for the help and encouragement.
Nick England K4NYW
www.navy-radio.com

On Sat, Jan 21, 2017 at 5:37 PM, Nick England <navy.radio at gmail.com> wrote:

> This machine rings the bell on FIGS-E (3) and also on FIGS-S (BELL)
> For FIGS-E it prints the 3 but space suppression is also activated so that
> the next character prints on top of the 3.
>
> E is 10000 and S is 10100, so at first I thought that maybe code bar 3 was
> stuck marking somehow so that FIGS-E looked like FIGS-S, but if that was
> the case lots of characters would get confused but everything prints OK
> except for this one stunt box function.
>
> So I am thinking there must be a missing tine on the BELL stunt box
> function bar (or tooth on the code bar). How very odd!
> Does this make sense to you guys with more M28 experience?
>
> The Stunt Box terrifies me, so I'll have to work up a lot more courage to
> pull out the function bar and see if that is it. I can live with a ding and
> overprinted 3 for now.
>
> best regards to all,
>
> Nick England K4NYW
> www.navy-radio.com
>
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