Posted by
Jim Brown-10 on
Mar 18, 2020; 6:34pm
URL: http://elecraft.85.s1.nabble.com/Off-Topic-Your-advice-suggestion-about-antenna-tp7658892p7659004.html
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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