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On Tue, 15 Jul 2003 13:10:26 -0500, "Dick, AA5VU"
wrote (with possible editing): The subject says it all - I have a CDE Ham-IV control head that is acting up and I recall web page that contains tips on how to trouble shoot. Mine light up and the indicator falls to the right side. If I mess with the brake control it sometimes comes back to live. BTW, It still turns the beam even thought the indicator is stuck in the South position. Anyone have the URL on the tip sheet? 73 de Dick, AA5VU Dick, Just a guess, but if I remember correctly, the CDE rotors' meters just measure the voltage across a 500 ohm potentiometer. What I would do is to disconnect the meter from the rotor and measure the resistance across the pot and swing arm. Then connect again and move it, say, 90 degrees or so, then measure again. If you don't get a reading under 500 ohms and/or it doesn't change, you have a problem in the rotor. If it reads ok and changes, then the problem is likely in the control. 73, Larry W1HJF |
"L. M. Rappaport" wrote in message ... On Tue, 15 Jul 2003 13:10:26 -0500, "Dick, AA5VU" wrote (with possible editing): The subject says it all - I have a CDE Ham-IV control head that is acting up and I recall web page that contains tips on how to trouble shoot. Mine light up and the indicator falls to the right side. If I mess with the brake control it sometimes comes back to live. BTW, It still turns the beam even thought the indicator is stuck in the South position. Anyone have the URL on the tip sheet? 73 de Dick, AA5VU Dick, Just a guess, but if I remember correctly, the CDE rotors' meters just measure the voltage across a 500 ohm potentiometer. What I would do is to disconnect the meter from the rotor and measure the resistance across the pot and swing arm. Then connect again and move it, say, 90 degrees or so, then measure again. If you don't get a reading under 500 ohms and/or it doesn't change, you have a problem in the rotor. If it reads ok and changes, then the problem is likely in the control. 73, Larry W1HJF I was also going to venture a WAG that the indicator pot (or wiring to it) may have "gone south." The suggestions above are a good way to verify/discount that WAG. Carl - wk3c |
"L. M. Rappaport" wrote in message ... On Tue, 15 Jul 2003 13:10:26 -0500, "Dick, AA5VU" wrote (with possible editing): The subject says it all - I have a CDE Ham-IV control head that is acting up and I recall web page that contains tips on how to trouble shoot. Mine light up and the indicator falls to the right side. If I mess with the brake control it sometimes comes back to live. BTW, It still turns the beam even thought the indicator is stuck in the South position. Anyone have the URL on the tip sheet? 73 de Dick, AA5VU Dick, Just a guess, but if I remember correctly, the CDE rotors' meters just measure the voltage across a 500 ohm potentiometer. What I would do is to disconnect the meter from the rotor and measure the resistance across the pot and swing arm. Then connect again and move it, say, 90 degrees or so, then measure again. If you don't get a reading under 500 ohms and/or it doesn't change, you have a problem in the rotor. If it reads ok and changes, then the problem is likely in the control. 73, Larry W1HJF I was also going to venture a WAG that the indicator pot (or wiring to it) may have "gone south." The suggestions above are a good way to verify/discount that WAG. Carl - wk3c |
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