Mike, I had a slightly related problem which turned out to be the phase shift capacitor in the rotator. You can see it on the schematic. The rotator would work fine with no load, and would generate more torque than you could stop with your hand. However, it would not move my array, which is admittedly overloaded. There was definitely a thermal effect here, in that on a cool day it would work a little, but not on a hot one. Replacing the capacitor solved the problem, but it was messy. If they just plugged it in but did not test it under a real load, they MIGHT have missed a problem. My experience with Yaesu/Vertex techs is that they are either excellent, or incompetent, with little in between.
If you can find a good capacitor, you can bridge the lines at the control box end in parallel with the rotator unit. If it works, or works better, that is a good indication of a bad internal capacitor. Alan WA4SCA -----Original Message----- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Michael J. Wolthuis Sent: 22 November, 2009 19:07 To: Elan Portnoy Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: Help with Yaesu g5500 Not the switch unfortunately. The same problem occurs when controlled by computer from Uni_trac 2000. Work about 25% of the time. Mike kb8zgl Elan Portnoy wrote: > Spray-out the switch with cleaner? > > > --- On Fri, 11/20/09, wolth...@msu.edu <wolth...@msu.edu> wrote: > > >> From: wolth...@msu.edu <wolth...@msu.edu> >> Subject: [amsat-bb] Help with Yaesu g5500 >> To: amsat-bb@amsat.org >> Date: Friday, November 20, 2009, 11:12 PM >> I bought a used Yaesu g5500 and it >> has a strange problem. The AZ works perfect, but when I >> push the EL button it seems to work (ie. Move up or down) >> about 1 out of 4 tries. I can regularly duplicate the >> issue where I can't get EL to change. If I wait 30mins and >> come back then it sometimes works right away. >> >> The rotor itself was into Yaesu and they said it was 100% >> perfectly fine. I have tried swapping the AZ/EL cables >> around and no difference. >> >> It has to be a controller issue I think. Any ideas before >> I box it up and ship it to Yaesu to check? >> >> When it works, it works fine and typically for 5-10mins >> straight, but then suddenly it will not change again. >> >> Mike >> kb8zgl >> _______________________________________________ >> Sent via amsat...@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 >> >> > > _______________________________________________ > Sent via amsat...@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 > > _______________________________________________ Sent via amsat...@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 _______________________________________________ Sent via amsat...@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
