[GreenKeys] Governed motor speed control variations.

[Jeffrey D Angus]

On 12/18/2015 3:59 PM, Jack wrote:
>
> There was an article in Ham Radio magazine in the 70’s that described
> a speed control for a governed motor TTY. I believe it was a Kleinschmidt
> TT-98. It required the construction of an optical encoder “wheel”.
>
That's one method.
I wouldn't mind seeing a copy of the article if someone knows where to
find it.
The one I'm using will be a Hall effect sensor and a magnet.
The circuit I'll be playing with is this:
<http://zpostbox.ru/frequency_comparator_circuit.html>
Either the TTL version with the monostable, or the CMOS version with
just an RC network.
Control will be done with a solid state relay across the original dropping
resistors.
Heinz was kind enough to send me a spare governed motor to play with.

-- 
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com

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