[GreenKeys] excessive line feed suppression

[Jerry Murphy]

The gold standard for non-overline and line feed suppression was the
193936 mod kit.  The kit allowed a machine to line feed when it received 
the CR code and then blocked line feeds for the next two operations.  
The sequence CR CR LF would result in only one line feed.  

The parts for this mod kit can be viewed in the parts book for the M28
compact typing unit.  Here's the link:

  http://navy-radio.com/manuals/tty/jh/ttyman7/TeletypeManuals/model28/573-115-802TC-Iss1.pdf

Look on page 26 for the parts.

The Teletype specification for the 193936 kit is 50178S:  Here's the link
for the spec:

  http://navy-radio.com/manuals/tty/jh/ttyman6/specs/50178S-Iss1.pdf

Unfortunately, there are critical parts in the mod kit which are in the
"unobtainium" category so it is unlikely that a kit can be scrounged 
together from the junk box.

Jerry Murphy








-----Original Message-----
>From: Ken Stritzel <stritzel at svs.com>
>Sent: Jul 18, 2020 6:25 AM
>To: greenkeys at mailman.qth.net
>Subject: [GreenKeys] excessive line feed suppression
>
>Anyone have ideas on the parts required for a M28 stunt box that 
>will prevent excessive line (no more than two for this discussion) 
>feeds?  I thought using two 152668 function bars (LF) followed by 
>155130 (LF/NON-PRINT) would do the trick.  (of course, the proper
>function levers are included)  But, what happens when the forth or 
>fifth, etc line feed is sent.  Would seem to me my idea would suppress 
>the 3rd, 6th, 9th, etc line feed.
>
>THANKS for any suggestions!
>
>Ken, W9AEK