[TowerTalk] OCFD

Jim Brown jim at audiosystemsgroup.com
Fri Mar 24 17:55:44 EDT 2017


On Fri,3/24/2017 2:28 PM, Wilson Lamb wrote:
> All your problems will go away if you build some open wire line and 
> feed with a balanced tuner...HB or Matchbox. 

Those who believe this seem not to realize that any imbalance in the 
antenna SYSTEM causes the feedline to carry common mode current both on 
RX and TX. That may be no big deal on TX, but on RX, the common mode 
current created by noise pickup couples to the antenna if the system is 
less than perfectly balanced. As noted in an earlier post, most wire 
antennas that we mere mortals can install are unbalanced by their 
surroundings or by asymmetry in their construction or rigging.

73, Jim K9YC



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