[GreenKeys] Model 32

Sat Mar 27 09:33:35 EDT 2021

Steve, Paul, Jeff, and Wayne, et al 

Why is this device called a RANGE FINDER ? Well, it can be used to find out 
the 'range' in which the machine will provide near - errorless copy, with a few 
assumptions. 

Ideally, one needs a "FOX Machine" which is programmed to send the famous 
"QUICK BROWN FOX" sentence, over and over, while one slowly moves 
the RANGEFINDER in one direction, noting the 'number' where errors start to 
show. Then the RANGEFINDER is moved in the other direction, past the area 
where it was showing good copy, until errors again start to show. This number is 
also noted. The difference between the two numbers is THE RANGE. 

Then, the smaller is subtracted from the larger to provide an actual number. That 
is the 'points of range' for that machine. This difference is divided by two, then that 
figure is added to the lower number, and this SUM is the place to set the 
RANGEFINDER for optimum copy. This sometimes allows for static, interference 
a generally noisy band and perhaps some 'bias' distortion in the incoming signal. 

Now, about those 'assumptions' mentioned above. 

One is that when you are on the air or copying some kind of broadcast, that the sending 
station has the same speed gears in his machine, and that both machines are 7.41 code or 
7.00 code, along with the receiving station. Minor differences can get in the mix, so 
having one's "RANGE" properly set gives the best copy. For compensating for a 
difference in speed, you are on your own. It has been noted by several that by making 
a change to one's RANGEFINDER, they can get fair to good copy from a source that 
is running at a different speed. 

Now, I am going from memory, after seeing a friend do this to a number of machines he 
had repaired or modified or otherwise worked on for friends. He had one of those "FOX 
Machines" and knew how and when to use it. 

The first time I watched him do this, he 'talked me through it' and explained virtually every 
move he made. 

Without one of these machines, the next best approach is to make an "RYRYRYRY" 
tape and make it into a loop and run it through your TD as the source for making the 
adjustments and calculations mentioned above. 

There are a few people here on GreenKeys who know who I am talking about with the 
'lesson' above. Going back to the late 1960s, he was a Michigan Bell Telephone employee, 
who hired in around the time I was born, as a TELEGRAPHER for them! He eventually 
got into installations and on site repairs, and eventually made it into Management. He 
NEVER worked in any kind of data or with Teletype machines. This became a hobby for 
him, later in his life. 

He was one of the unfortunates who got drafted twice. Once for WW II and again for the 
"Korean festivities". But, that's another story for another 'group', maybe. 

I hope I've created more useful information than confusion. I suspect that there will be some 
who know this process and might add a few details here and there. Have at it. I know that 
what I offered above is reasonable, but perhaps not 'right out of the book'. 

For now, 

Ralph - W8ROI 

- - - - - - - - 

----- Original Message -----

From: "Steve Garrison" <steve.n4tty at gmail.com> 
To: "Paul Heller" <paulsheller at icloud.com> 
Cc: "N4TTY at arrl.net" <N4TTY at ARRL.NET>, "Greenkeys" <greenkeys at mailman.qth.net> 
Sent: Saturday, March 27, 2021 5:42:25 AM 
Subject: Re: [GreenKeys] Model 32 

Ah, so! Did not realize it was actually handling a speed difference! Thought it was just to allow "dial" capabilities for a machine that had no dial mechanism. 

Another day and still learning! 

Steve G./N4TTY 
Sent from my iPhone 

On Mar 26, 2021, at 4:23 PM, Paul Heller < paulsheller at icloud.com > wrote: 

Hi Steve, you are using a special feature of i-Telex that alllows it to work with 60WPM. The telex standard is 66WPM, but the smart folks behind iTelex made firmware that translates back and forth for 60WPM machines. 

Paul 

<blockquote>

On Mar 26, 2021, at 2:02 PM, Steve Garrison < steve.n4tty at gmail.com > wrote: 

You guys have me thoroughly confused! My M28 is at 60 WPM and I go back and forth between i-Telex, ITTY, and RTTY all the time? 
Steve G./N4TTY 
From: greenkeys-bounces at mailman.qth.net < greenkeys-bounces at mailman.qth.net > On Behalf Of WAYNE 
Sent: Friday, March 26, 2021 3:43 PM 
To: Jeffrey Angus < jdangus at att.net >; greenkeys at mailman.qth.net 
Subject: Re: [GreenKeys] Model 32 
Jeff, 
Very good point! If you send at the wrong speed the receive end would have to move his rangefinder. Dont think most would do that. 
73, 
Wayne 
KB1FDW 

<blockquote>

On 03/26/2021 3:24 PM Jeffrey Angus < jdangus at att.net > wrote: 
On 3/26/21 1:16 PM, Duncan Brown wrote: 

<blockquote>

You need to decide what speed you want to copy. But you don't want to 
have to change gears whenever you want to switch between ITTY and 
I-TELEX, so the range control is the simplest way to cover both 60 & 
66 WPM. 

Here we go again. 
The Ranger finder only helps you copy the wrong speed. 
It does nothing to your transmit speed. 
i-Telex will only work if your machine is running at 66 WPM. 
-- 
"I am a river to my people." 
Jeff-1.0 
WA6FWI 
www.foxsmercantile.com 
______________________________________________________________ 
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 
>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch 
>>> 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 
Message delivered to teletypeparts at comcast.net 

</blockquote>

______________________________________________________________ 
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 

<blockquote>

<blockquote>

<blockquote>
Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch 
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 

</blockquote>

</blockquote>

</blockquote>

This list hosted by: http://www.qsl.net 
Please help support this email list: http://www.qsl.net/donate.html 
Message delivered to phearvada at gmail.com 

</blockquote>

</blockquote>

______________________________________________________________ 
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 

>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch 
>>> 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 
Message delivered to w8roi at wowway.com 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20210327/244b5924/attachment.html>