Test it with an external 500 ohm pot with clip leads to the indicator and then at the rotor end before disassembly. If this has been up for a while, check your cabling. Mine has been up a while and I have to replace it(cable) going to my main HF beam. Good luck and let the BB know what you found ...! Sometimes, we think someone fell off a tower and never hear about a successful repair...(HA!) Wear a climbing belt, please!! 73, Dee, NB2F
-----Original Message----- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Jim Jerzycke Sent: Wednesday, January 05, 2011 3:59 PM To: D. Craig Fox Cc: amsat-bb@amsat.org Subject: [amsat-bb] Re: Ham IV rotor problem Sounds like the potentiometer inside the rotor housing has died, a common thing with these rotors. IIRC, it's a 500 Ohm wire-wound pot, with the winding connected between pins 3 and 7, and the wiper tied to the ground pin, #1. You can get a manual for it here: http://www.hy-gain.com/man/pdf/HAM-IV.pdf HTH! Jim On 01/05/2011 08:26 PM, D. Craig Fox wrote: > Greetings and happy new year to my fellow sat-ops. I thought I would try here before searching the entire 'net, for some tips in trouble shooting a rotor problem. My up/down link sat antennas are mounted on a common boom, fixed el., above my HF yagi. I turn all of it with a very old Ham IV rotor and the original CDE controller. Here is the problem. The rotor turns fine, but there is no readout of direction. This first began to occur intermittently, then finally the needle just stopped moving while turning the antennas. I have checked the wiring at both ends and all seems in order. I am really hoping to avoid having to tear down the rotor, so any suggestions on trouble shooting from "outside the case" would be greatly appreciated. > Thanks much. > > Craig > N6RSX > > > > NOTICE: This communication may contain privileged or other confidential information. If you are not the intended recipient of this communication, or an employee or agent responsible for delivering this communication to the intended recipient, please advise the sender by reply email and immediately delete the message and any attachments without copying or disclosing the contents. Thank you. > _______________________________________________ > 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
