Only up to 21 MHZ, is because of too much inductance.
Unun must be acting like a old fashion link coil with out the link. I did
something like that with a single coil and had 3 pairs of taps. One pair of
taps for input, one for caps and one for the roller inductors.
I did not know that any one made a 4:1 unun balun.
You took and installed a 1:4 unun on the input. That should be 200Ohms to the
L- match and 50 ohm out to the coax line of the antenna. Do I have that right
or is it a 1:4 then 4:1 making it a unun on the input, then to the L-Match?
You got more band width out of the tuner. Now why is that? L- Match is rather
Making up a 1:4:1 unun is easily done Just on the input side of the tuner with
out taking the tuner a part.
You mush have float the ground on the tuner? Did you ground one side of the
unun on the 4 side rather than the 1 side?
Keep The Faith, Jim K9TF/WA9YSD
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