I have an inverted L and using a hairpin coil to match in on 160M.
One coil is 6 inches OD the other is 2 inches OD. I have been thinking
about making another hairpin with wire wrapped around a toroid donut,
I have noticed with the 6 inch coil I have a higher noise level on 160M and
hear BCI pretty strong on certain frequencies on other bands.
The 2 inch coil has lower noise level on 160M and BCI is reduced on other
bands.
If I use a toroid hairpin What would happen to the noise level and BCI? My
guess is both will be reduced a bit more.
Also what hairpin matching coil should I use and why?
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Jim K9TF
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Topband Reflector
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