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************************************************************************ ** I cannot tell enough about your setup, but it sounds like an inherently unsafe condition. Just from what I have read, I have a couple of concerns: 1) Are you too close to the power line to be safe? I have heard of people getting shocked by just having a metal roof on a barn too close to a high voltage line when they lean their metal ladder up there. 2) If you are close enough to get induced voltage, then you will probably be plagued with line noise problems too. I don't know what your relationship is with your local power company, but if you know one of the guys who work on Line Noise problems, I would contact him and explain the situation and ask for advice. ************************************************************************ **** -----Original Message----- From: Jim Smith [mailto:jimsmith@shaw.ca] Sent: Sunday, July 28, 2002 3:51 PM To: w6rw@earthlink.net; Force 12 Reflector Subject: Re: [Force 12 Talk] AC Voltage from Antenna Hi Mike, Are these voltages measured between the shield and centre conductor or between the shield and ground? If between the shield and centre conductor, connect a low value resistor (100 ohms? 1 kohm? pretty arbitrary) between the shield and centre conductor and remeasure the voltage. I think you'll find that the measured voltage will now be very low, indicating that the impedance of the AC source is very high. If it were me and I found this to be the case I would go ahead and connect the radio, having removed the test resistor of course. Comments anyone? If you try this, let us know what you found. Hope this helps 73 de Jim Smith VE7FO Michael S. Mitchell, W6RW wrote: >Hi.....we just installed an EF-130, a 4BA and a 620/340NZ at my >QTH......I live relatively close to some high voltage power lines and >during the installation we noticed that the antennas were "hot" with a >little bit of electricity. We have measured 7.8 volts of AC on the 20 >meter feedline and on the 17/15 feedline. We have also measured that >there is no voltage at all on the 40, 30 or on the 12/10 feedlines.....I >presume that this is true because these antennas have feeding >arrangements that look like a "short" at 60 cycles. > >I am afraid to connect either of the 2 "hot" feedlines to my radios for >fear of damage to them. Has anybody else experienced this and does >anybody have any suggestions for me. > >Tnx es 73 de Mike/W6RW > > > > >-------------------------------------------- >Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. >Force12 Web Site: http://www.force12inc.com > >To Submit Message to the List: Force12Talk@qth.com >To unsubscribe and view the Message Archive: see http://qth.com/force12/list >For problems with the list: contact n4zr@qth.com > > -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com -------------------------------------------- Force12Talk mailing list provided as a service by Force 12 Antennas, Inc. Force12 Web Site: http://www.force12inc.com To Submit Message to the List: Force12Talk@qth.com To unsubscribe and view the Message Archive: see http://qth.com/force12/list For problems with the list: contact n4zr@qth.com |
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