[GreenKeys] Suppression - M28 printers

[John, W9DDD]

Selective calling.   It also uses the zero code bar.  I can never 
remember the names of the conditions.  But basically receiving the CDC 
code can put you in print.  Zero code bar then can be positioned to 
blind the printer to any future CDCs.  Then at the end of the message 
you get a code that puts you into non-print, suppressed and back into 
being able to decoded CDCs.

I have printers with the solenoid and without.  In all cases the little 
arm is down into the slot.  I think the solenoid to allow monitoring the 
line irregardless of stunt box codes.

There's 3 or 4 docs about the stunt box that goes into all the nuances.  
With 42  slots the combinations are endless (almost, you have to use 
some of them to do things like CR, LF, and FIGS-LTRS shift)


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

On 3/8/2022 5:07 PM, Nick England wrote:
> I recently unearthed a 28 typing unit with a solenoid on the left end 
> for print suppression. Not something I had run across before.
> Having never paid any attention to the SUPP code bar, I took a look at 
> some other units and found the following other variants-
> SUP code bar pulled to left by spring tension
> SUP code bar pinned to right (by small lever fitting into code bar 
> notches)
> SUP code bar with linkage for solenoid but pinned to right (by small 
> lever fitting into code bar notch)
>
> The spring unit types OK no matter if is left or right…hmmm.???
>
> So what’s the story on the suppression solenoid - what was it used for?
>
> Cheers
> Nick K4NYW
>
> -- 
> Nick England K4NYW
> www.navy-radio.com <http://www.navy-radio.com>
>
>
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