[GreenKeys] Model 15 Governed motor, tuning fork.

[Duncan Brown]

Probably not worth the effort.

Our TTY machines are designed to operate _asynchronously_ and will work 
with motor speed differences of 5 to 10%.

At 60wpm, a data bit is 22ms and the machine only needs about 4 ms to 
make the mark/space decision.  So there can be some slop in the motor speed.

Have fun,

Duncan
K2OEQ

On 9/29/2025 3:29 PM, hwhall--- via GreenKeys wrote:
> This seems like an opportunity for invention for someone. How hard would it be to build a device that reads the governed motor speed & can automatically adjust the motor for any speed desired? I've not worked with one but it sounds like they could be controlled by PWM since governor contacts opening & closing sound like a sort of PWM.
>
> (standing by to learn that this has already been tried & why if didn't work)
>
> Wayne
> WB4OGM
> ______________________________________________________________
> 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 toduncanancy at earthlink.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20250929/fe348698/attachment.html>