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Old April 18th 08, 12:08 PM posted to rec.radio.amateur.antenna
Barrett Barrett is offline
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First recorded activity by RadioBanter: Oct 2007
Posts: 69
Default 1/4 Wave on 28.500MHz

Cecil, got a question for you.
I have another 20ft pole mounted on the back of my house and it is rested on
the patio floor. I plane to put up a Cushcraft MA5B on this pole and a 2/70
collinear on top. Does this mean that there will be high voltage on the pole
beneath the beam from the beam or from the collinear?

The children will be out in the garden when the weather gets better.

Thanks


"Cecil Moore" wrote in message
...
Barrett wrote:
Just went out to get things ready to try the Ariel's out tomorrow and it
occurred to me that the 20ft pole is resting on the patio. To make this
work, would I need to lift the pole off the floor and would 1ft be
enough?


Depends on whether the patio is conductive or not.
Probably best to rest the base on an insulator.
Also be aware that, at 100 watts, there will be
hundreds, if not thousands of volts present at
the base of the pole. I once keyed down while
a cat was standing on one of my radials. Not
sure where it went, but it might have gone
into orbit. Have you considered sleeving the
pole inside PVC pipe for safety reasons?
--
73, Cecil http://www.w5dxp.com