[Elecraft] Off-Topic: Your advice/suggestion about antenna

Jim Brown jim at audiosystemsgroup.com
Wed Mar 18 14:34:39 EDT 2020


On 3/18/2020 5:39 AM, Lyn Norstad wrote:
> I have a hybrid 4:1 / 1:1 balun at the shack end of the balanced 
> feedline and have absolutely no issues. 

Hi Len,

The problem is noise pickup on the line. I think I remember that your 
QTH is relatively isolated, hence not much local noise. The other 
question is, how would you know if you had an issue without an A/B 
comparison to a resonant dipole with a choke at the feedpoint?

None.  It is a Balun Designs 4116t.

This company appears to have no clue about how chokes work to kill 
noise, but they're very good at selling them. Their definition of 
"working" seems to be that the customer pays and the "balun" doesn't 
burn up. Last year, a member of our contest club building a station in 
the Caribbean asked me to measure one of their products. It looked 
NOTHING like the data sheet on their website. After I circulated the 
data to a few engineers as a "heads up," the plot disappeared from their 
website.

73, Jim K9YC





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