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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 |
#2
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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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