Jeff,
I haven't seen any replies so I'll give you my input.
These are excellent and flexible controllers. I have one here on my EME array which uses the M2 MT-3000 positioners and have installed them at several university ground stations as well as the Air Force Academy. In those places they control various antennas from 4 meter dishes to V/U Yagi arrays. Tech support is excellent. The user guide is comprehensive. The setup software utility is easy to use.
One thing the Green Heron will do is always count the pulses from the rotor motors even when you are sending it rapid commands over the computer link. We have had problems with other control boxes missing pulses and therefore getting out of calibration with the antenna when there is constant serial port traffic. The GH will always capture every pulse and will stay calibrated. (It will also work with voltage sense feedback from motors like the G5500). The USB interface eliminates intermediate boxes.
Note that you will want to tell GH what rotor and interface you will use the controller with so it can be configured before they send it to you.
These are not cheap. But we have had no problems with any of eight or so we have worked with. One, installed at U Alaska Fairbanks, has been operating autonomously or via remote connection for nearly two years without a problem.
I'd highly recommend them.
Jim
Jim White Colorado Satellite Services, LLC jim@coloradosatellite.com
On 12/12/2019 9:47 AM, Jeff kb2m via AMSAT-BB wrote:
I’m looking to buy a Green Heron RT-21 AZ/EL rotor controller to replace the one that came with my Alfa Spid AZ/EL RAS. Every time I move back here for the winter I end up taking apart and fixing the Rot2pro G that came with the Spid rotor. If any one that has one I would like your opinion, Thanks…
73 Jeff kb2m
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