I have final got my tower to radiate reasonably well on 80m .... 160 is
next. I find that I have a lot of noise from local AM stns on 80m. There is
no noise from on the 80m inverted vee. In fact, with the vertical the
daytime noise is > S3-4 across the 80m band and in certain spots like 3.650
MHz I have S9+20db with 3 or 4 local stations mixed together (my rx is an
ICOM 736). I found that if wound 60 ft or so of coax into a choke with a
diameter of approx 3 ft and put it in the feedline near the base of the
tower the noise is substantially reduced. The daytime noise drops to < S2
and the noise at 3.650 MHz is reduced to < S4-5.
What is the most effective way to handle this problem?
Sylvan Katz, VE5ZX
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