[TowerTalk] To get a truly balanced antenna feed

Jim Brown jim at audiosystemsgroup.com
Wed Jun 22 02:21:59 EDT 2016


On Tue,6/21/2016 9:31 PM, Roger (K8RI) on TT wrote:
> Didn't you once say "there is no such thing as a balanced antenna"? 

Yep, but I was speaking more in terms of perfection -- i.e., that in the 
real world, most practical antennas are unbalanced by their 
surroundings, even if we attempt to make them a balanced antenna and 
feed them with 2-wire line and a so-called balance tuner. It is that 
imbalance that causes common mode current. If the imbalance is 
relatively small, and if the antenna is resonant and fed with coax, we 
can choke it effectively.

73, Jim



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