[GreenKeys] WBR70

[David I. Emery]

On Fri, Oct 01, 2010 at 10:45:45PM -0400, Teletypeparts wrote:

> It seems like I remember that WX speed was 75 WPM and I have seen some
> 15's running at that speed, but most at 60 or 66 as a Telex.  Never seen
> one at 100.   

	By the time I got involved in the mid 60s all the domestic WX tty
circuits were 75 BAUD, but 100 WPM... at one point the FAA and NOAA must have
had literally hundreds of 100 WPM circuits for weather, NOTAMs, other aircraft
related traffic, ATC clearances and so forth.  All using 28's.

	HF radio circuits were 60 or 66 WPM or 100 WPM.   For quite a few years 
in the 60s the navy ran a ISB broadcast with Atlantic Fax on one sideband and
a 100 WPM weather wire on the other... 

	I ran into VERY little 75 WPM traffic anywhere I looked in that era...
seemed like an orphan speed...

> The USAF had the first Kleinschmidt Comet 300 (?) WX machines that I
> ever worked on.  They ran at 300 WPM.  Fast rotating drum and 2 little
> moving hammers that hit at exactly the right time.

	In my endless years of collecting odd surplus junque at one
point in the mid 70s I had a couple of those 2 hammer Kleinschmidts from
Honeywell computer surplus.   Never did much from them, but they were
brand new in box... and cheap.

	Later I learned in that in the Nixon era the RTTY printers on
AF-1 were those kind of Kleinschmidt drum printer... mostly used at 75
baud with KW-7 crypto gear...

>	  Always breaking down.

	Hope not on AF-1

>  And then the GE Terminets.  Matchstick like fingers with letters on a fast
>   rotating belt.  Another nightmare to work on.  

	Used one of those with a home minicomputer setup as a printer before I
bought a Teletype model 40 printer for that...

-- 
  Dave Emery N1PRE/AE, die at dieconsulting.com  DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in 
celebration of what could have been, but wasn't and is not to be now either."