Topband: 160m Vertical

[Rob Atkinson]

On 5/15/2020 8:27 AM, donovanf at starpower.net wrote:

""A more reliable approach is a tuner in your shack. The extra coax
cable loss from elevated VSWR is insignificant on topband.""

We don't really have enough information to make that claim.  First,
you ought to get a copy of Radio-Electronic Transmission Fundamentals
by B. Whitfield Griffith, Jr.  It is a standard college textbook for
EE students interested in broadcast engineering and focuses mostly on
medium wave and is easy to understand.

We shouldn't advise you to put a matching network at the transmitter
end of your line until you tell us what sort of feedline you are
using, how long it will be, and what your transmitter power to the
line will be.  The wrong line with too much power over enough fraction
of a wavelength, with a high vswr, could cause a dielectric breakdown.
There's more to this than loss.

73

Rob
K5UJ