Something to keep in back of your mind if you're shunt or series feeding
your tower for 160. If your antenna has a wonderfully wide bandwidth,
it may be due to a mediocre ground system. Ground losses can act like a
"swamping" resister; kinda like placing a 100 ohm resister in parallel
with a radiation resistance of 100 ohms; mighty fine match, not so very
efficient! Some ops have found that as they improved their ground
system, their bandwidth went down! For best performance, keep burying
copper and as W8JI points out; keep your matching system Q as low as
possible (better bandwidth and lower re-circulating currents (less
loss))...73 Don, K9NR
--
FAQ on WWW: http://www.contesting.com/FAQ/topband
Submissions: topband@contesting.com
Administrative requests: topband-REQUEST@contesting.com
Problems: owner-topband@contesting.com
|