On 11/12/2022 8:08 AM, jcjacobsen via Topband wrote:
You have a wire dipole for 75 meters fed with a 1:1/5K rated balun.
Commercial "baluns" are next to useless. I use one of these on all of my
six dipoles.
http://k9yc.com/2018Cookbook.pdf
There are several very good ways to match an 80/75 dipole over 3500-3900
kHz, so that an in-shack tuner can easily match it. The one I recommend
is described in this applications note about using SimSmith to design
matching networks. It's really simple, involving nothing more than
adding a length of different coax to the feedline. It's a very old
technique -- W6NL, who taught at Stanford, is credited with it by local
hams, but he said it's MUCH older than he is. :)
http://k9yc.com/PacificonSmithChart.pdf
73, Jim K9YC
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