Re: [amsat-bb] More Kansas City Tracker Questions

[Joe Leikhim <jleikhim@xxxxxxxxxxxx>]

Thanks for the tip about the U-12. I was wondering when someone would think
of using an instrumentation board or a PLC. I guess the KCT-T is seeing it's
final days.

Al Zoller wrote:

> Hi Joe,
>
> Am also in the same process with a 10 footer. Have been using a KCT-T for
> many years but switching to a LabJack U-12 box that Nova now supports. It
> has 12 bit A to D's.
> Best thing is it uses a USB port and doesn't eat up a slot  .labjack.com
>
> My el rotor will do 180 deg and I have built a pendulum/gear drive for a
> three turn pot.
> Worst problem is backlash. Using a 25 oz weight and 1 k pot. Look for pots
> with as goods linearity as you can find. 0.5 % or less will work. Carbon
> doesn't make it. Not cheap!
>
> I've talked to W0LMD numerous times about this project and he is insistent
> that the pendulum idea is not good. I may revert to a single turn but had
> to try the gears as they had been in my junk box for years. Recommend using
> as much of the pots rotation as possible.
>
> Would like to share experiences with you as we progress.
>
> 73 de N7UB, Al
>
> >

--
Joe Leikhim K4SAT
Jleikhim@nettally.com

"Jazz is not dead.  It just smells funny." -F.Z.


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