[GreenKeys] do the length of stop bits affect clutch wear?

[Ralph Irish]

Duncan

Well, I stand corrected about the Crypto MOdel 28s speed.  I thought it was faster.  I won't 
make that mistake again!  There  is printer speed and TD speed here.  I suppose a TD could be
slowed down with a few extra milliseconds inserted between each character.  That would reduce
the 'net' speed and allow the printer to operate at a faster (character) speed.

We had a 28KSR with 100 speed gears for our KWR-32 systems.  The first time I saw that machine
run at 100 WPM I mentally gave it about 2 months before it shook itself apart!  Needless to say,
that never happened.  It took me a while to see just how well engineered the 28 was.

We had a Model 19 connected to the KW-26.  Another Model 19 interconnected with the PYTHON
system.

Somehow, four AN/URA8A RTTY converters were all that was needed.  They could be split into
two converters each, if necessary.  That probably happened a few times.

Thanks for the correction.

Ralph - W8ROI

-   -   -   -   -   -   -   -

On Nov 23, 2018, at 6:06 PM, Duncan Brown wrote:

> Some of the older, electromagnetical crypto gear (KL-7 ?, KL-47 ? and earlier) couldn't operate as fast as 60 wpm, so they had to slow the tape readers down to a speed  (40-50 wpm ?) that they could handle.
> The electronic crypto gear, KW-7, KW-26 could handle 60 wpm and maybe higher.
> 
> Duncan
> 
> On 11/23/2018 14:17, Jim Haynes wrote:
>> Prior to AUTODIN the crypto people for some reason found it necessary
>> to control the rate of character emission from all the TTY sending
>> devices.  In the Model 28 parts books you'll see sets of parts to adapt
>> keyboards to "synchronous pulsed operation".  Sometime in the 1970s I
>> bought 3 racks of equipment at a surplus sale.  Two of the racks held
>> regenerative repeaters, and the other held what were called TD pulsers
>> which simply generated pulses at the character rate to pulse the sending
>> devices.  Beats me why those smart people in the crypto agency couldn't
>> accomodate the natural output of keyboards and tape readers.
>> 
> 
> 
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
> 
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
> 
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20181123/692041b3/attachment.html>