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Old June 13th 05, 12:18 AM
Al
 
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For exactly the same reason that you need a choke on a ground plane or
any other antenna feed with coax. sniped


Danny, K6MHE


I agree with the choke needed on a ground plane. But all antennas ?
Sure you can put a choke on a OSJ won't hurt, won't help ether.
Been there, done that.

73 Al Lowe N0IMW

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Old June 13th 05, 01:39 AM
Dan Richardson
 
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On 12 Jun 2005 16:18:35 -0700, "Al" wrote:

For exactly the same reason that you need a choke on a ground plane or
any other antenna feed with coax. sniped


Danny, K6MHE


I agree with the choke needed on a ground plane. But all antennas ?
Sure you can put a choke on a OSJ won't hurt, won't help ether.
Been there, done that.

73 Al Lowe N0IMW


Allow me to repeat: *ANY* antenna feed with coax should employee a
choke. It is just good engineering practice.

If your beloved open base j-pole is feed with coax that is any
multiple of a 1/2-wavelength you ARE GOING TO HAVE HIGH COMMON MODE
CURRENT!

So just what makes you beleive that your open base j-pole has some
magical properties that is self-decouples itself from the feed line?

73
Danny, K6MHE



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