On Jul 13, 10:12 am, msg wrote:
Greetings:

Please view these photos of a three-turn planetary drive
pot that uses a conventional "stackpot" formfactor athttp://www.cybertheque.org/homebrew/rcvr/images/antennas/pot.jpg
Resistance = 1K

It was made in 1966 by CTS; stampings: 36129 137.6637

Does anyone recognize this pot technology? Any suppliers
nowadays? I need the form factor for modifications to antenna
rotator assemblies in a space that does not permit using
larger multi-turn pots and using trimmer versions is not
sufficiently robust.

Wow, I had seen those in the past but not for many many years.

If you are truly updating some rotators, there are some articles in
QST, CQ, 73, etc. from the past 20-30 years on doing it using
something other than 360-degree pots. Some of them use essentially
homebrew shaft encoders.

Tim.

agreed, i have used pc mouse encoders with a hacked mouse circuit board for
various projects.

2 axis, three butttons , plenty of easy to use software, even write your
own visual basic

can even determine direction and speeds!

its all simple enough and uses standard rs232 ports.

mouse click buttons can be used to determine limit positions at extreme
points

the newer mice with some 6 or 7 variables can do lotsa stuff!



"Tim Shoppa" wrote in message
ups.com...
On Jul 13, 10:12 am, msg wrote:
Greetings:

Please view these photos of a three-turn planetary drive
pot that uses a conventional "stackpot" formfactor
athttp://www.cybertheque.org/homebrew/rcvr/images/antennas/pot.jpg
Resistance = 1K

It was made in 1966 by CTS; stampings: 36129 137.6637

Does anyone recognize this pot technology? Any suppliers
nowadays? I need the form factor for modifications to antenna
rotator assemblies in a space that does not permit using
larger multi-turn pots and using trimmer versions is not
sufficiently robust.

Wow, I had seen those in the past but not for many many years.

If you are truly updating some rotators, there are some articles in
QST, CQ, 73, etc. from the past 20-30 years on doing it using
something other than 360-degree pots. Some of them use essentially
homebrew shaft encoders.

Tim.