In old days hams fed 10:1 antennas with ladder line and did well.
Just keep feedline loss to a minimum. I feed my apex high delta loops
direct with a good toroid coax choke at feedpoint at bottom corner (low
impedance) near the shack.
Coax is short and lmr240, works great. I tested 2:1 & 4:1 baluns etc on
previous advice and the result was not as good as a good direct feed
with high impedance choke.
Look out for vk4tux on FT8.
On 2/4/20 9:32 am, Josh Fiden wrote:
This all reminds me of the difference between when I was a young teen getting
started as a ham vs now.
As a kid I would put things together or throw em up. Only worried about it after it
didn’t work. Nowadays, I plan & overthink things to death before getting
anything accomplished. I prefer the old way.
73,
Josh W6XU
Sent from my mobile device
On Apr 1, 2020, at 4:20 PM, Frederick Dwight <[email protected]> wrote:
If you have 75 ohm coax, I would just try it. If the Z of the antenna is in
fact around 35 ohms, the Z at the shack end may be close to 35 ohms on some
bands, but on others the Z will be transposed to well over 100 ohms with an SWR
probably over 3 to one. One of my dipoles has a SWR at the top of 75 meters of
approximately 4:1, and I occasionally venture up there, but my K3S with
internal tuner does not complain and quickly matches it to about 1:1. Not
ideal and this is not the way I usually build my antennas, but the loss is not
too bad. If you can build a unun with approximately a 1:2 ratio this should
solve your problem. If it does not cover all the way from 80 to 10 with low
loss, I would not worry too
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