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Subject:  AC Voltage from Antenna Author:  Pete Smith <n4zr@contesting.com> Date:  28-Jul-2002 20:06:14 At 01:50 PM 7/28/02 -0700, Jim Smith wrote: >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. Another approach would be to use a series capacitor in the center conductor before your radio. My Heathkit remote antenna switch uses a pair of paralleled .02 disc capacitors -- I'd guess 1 kv rating) to isolate the relay switching voltage, which can be as high as 22 VAC, from the radios and antennas being switched. 73, Pete N4ZR Check out the World HF Contest Station Database at www.pvrc.org -------------------------------------------- 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

This Thread   Date    Author    29-Jul-2002 Randy Moody 28-Jul-2002 Guy Olinger, K2AV * 28-Jul-2002 Pete Smith 28-Jul-2002 W0YG Charlie Summers 28-Jul-2002 Jim Smith 24-Jul-2002 Michael S. Mitchell, W6RW

This Author (Jul-2002)   Subject    Date    * AC Voltage from Antenna 28-Jul-2002 C31XR & guy wire detuning 25-Jul-2002 C31XR & guy wire detuning 24-Jul-2002 C31XR & guy wire detuning 24-Jul-2002 C31XRs in SO2R ??? 29-Jul-2002