Joel, I am not sure if thats exactly what u are looking for, but here is some material which might help you further. The setup is not strictly for 2 x u110 rotors, but can be adapted for other simple non-feedback rotors (radio shack etc.) as well.:

Original idea, setup and software from K8DAV: http://www.k8dav.com/u100_info.htm

KC2PCR's implementation with 2 U 110 rotors: http://www.youtube.com/watch?v=gHTEHUlqilk

I took K8DAV's software and extended it a bit, so it works fine over the parallel port (with no basic stamp controller) and a Radio Shack rotor for AZ and a homebrew rotor for EL: http://www.youtube.com/watch?v=B-nBYvPYOy4

Some pictures: http://evolution2enterprises.com/sat/sat.html

Feel free to email me if you have questions.

Cheers, Andy - VK4HHH

________________________________ From: Joel Black w4jbb@charter.net To: AMSAT amsat-bb@amsat.org Sent: Tuesday, 3 July 2012 8:09 AM Subject: [amsat-bb] U-110 Rotor Setup

I am looking for an old article regarding the use of two U-110 rotors for satellite operations.

I have gone through all my old references and cannot find what I'm looking for.

Basically, it was a setup using two U-110's (or it could have been two U-100's).  The homemade controller used either toggle or rocker switches and had a digital readout of AZ/EL using DVOM's.  As far as I remember, it was all manual.  I remember seeing this in the back of some publication, but I cannot find it.

Does anyone have any inkling of and idea what I'm talking about?

73, Joel - W4JBB _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb

I'm pretty sure this isn't the article you were thinking of, but I made my own Az/El rotor from a U-110 and a regular Ham-type rotor, with a Basic Stamp-based controller. Has both manual and automatic modes. See the pictures and links to the design documentation at the top of:

http://home.wavecable.com/~ko6th

Good luck,

Greg KO6TH

On Mon, Jul 2, 2012 at 3:09 PM, Joel Black w4jbb@charter.net wrote:

I am looking for an old article regarding the use of two U-110 rotors for satellite operations.

I have gone through all my old references and cannot find what I'm looking for.

Basically, it was a setup using two U-110's (or it could have been two U-100's). The homemade controller used either toggle or rocker switches and had a digital readout of AZ/EL using DVOM's. As far as I remember, it was all manual. I remember seeing this in the back of some publication, but I cannot find it.

Does anyone have any inkling of and idea what I'm talking about?

73, Joel - W4JBB ______________________________**_________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/**listinfo/amsat-bbhttp://amsat.org/mailman/listinfo/amsat-bb