At 03:47 PM 12/31/02 -0500, Chuck Counselman wrote:
>Most of the AC-line buzz, digital-computer hash, etc., that most hams hear
>is conducted to their antennas from their houses by common-mode current on
>imperfectly balanced feedlines. I heard it, too, before I learned to
>balance everything and eliminate the unbalanced, or "common" mode.
Well sure, you can improve the situation, but you're unlikely to make a
significant dent in the noise from a vertically polarized gain array on 80,
or a 160m transmit vertical, unless you're in a highly unusual location
with no pole-top emitters (or neighbors' electrically-heated dog dishes,
but that's another story).
Most of the noise I hear is being received on my antennas, not on the
coax. This is particularly true since I got rid of my CRT monitor. Wow-
what a difference an LCD makes! My CRT was noisy from 60Hz to at least 130
MHz, which is as high as I listened.
73, Pete N4ZR
Happy Holidays
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