[GreenKeys] Range finder adjustment

[John Lawson]

On Thu, 25 Nov 2004 Wndrrt at cs.com wrote:

> Hi Russ,
>
>
> I read about the milliseconds and the lengths of the pulse, so I understand
> exactly what you are saying.  It is a misadjustment, but it can work.  Now, the
> "eighty point" of range is new to me, but I will get right on it.  The 1962

   On the left hand side of your machine (facing the keyboard) is a small 
trap-door a few inches below the Crank.  Behind it is a curved metal arc, 
with a thumbscrew and pointer.  It is marked from 0 to 120 on mine. This 
is the 'range adjustment' that sets where the pulse train actually syncs 
up with the mechanical parts.

   To copy 50 baud, one adjusts this setting out of the 'normal' range of 
35 - 55 (at least on my machine) until the shorter start pulses trigger 
the printer.

   Now - I've tried this, and not had much luck with it, but it was some 
years back, and too many variables to control. Your Milage May (probably 
will) Vary.

   Also, I would suggest at some point you get a copy of TM 11-2216 
"TELETYPEWRITERS TT-7/FG and TT-8/FG"  and TM 11-680 "TELETYPEWRITER 
CIRCUITS AND EQUIPMENT (FUNDAMENTALS)". These are Army Technical Manuals 
which cover the Model 15 and 19 specifically, and TTY Stuff in general. 
Shouldn't be too hard to find among the Manual Reprinter Services that 
sell on eBay and elsewhere.

Cheers

John KB6SCO