F Z_Bruce
2018-04-16 17:15:55 UTC
A good reference for Beverage antenna length is by W3LPL, Search online for his patterns, F/B info.
If a shorter Beverage wire length is used because of space restrictions, a near perfect feed and restive termination can appear as a low VSWR, over a reasonable frequency range.
However here in Maine, the ground is typically not close to level in elevation , and with variations in soil conductivity, resonant lengths are beneficial..
One of the ways to make a wire look electrically longer is the use of covered wire. (Velocity factor that can vary with type of covering used).
Also some have placed small lumped inducatances along the way,, Another used a slinky..
Basic understanding about cores that most, excepting mix 33, are inductive, So have a question for anyone who has tried it. Will adding many mix, 43, and 77 spaced cores with a few turns each along the Beverage wire , lower the basic frequency enough to be beneficial?
73
Bruce-K1FZ
http://www.qsl.net/k1fz/beverage_antenna.html
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Topband Reflector Archives - http://www.contesting.com/_topband
If a shorter Beverage wire length is used because of space restrictions, a near perfect feed and restive termination can appear as a low VSWR, over a reasonable frequency range.
However here in Maine, the ground is typically not close to level in elevation , and with variations in soil conductivity, resonant lengths are beneficial..
One of the ways to make a wire look electrically longer is the use of covered wire. (Velocity factor that can vary with type of covering used).
Also some have placed small lumped inducatances along the way,, Another used a slinky..
Basic understanding about cores that most, excepting mix 33, are inductive, So have a question for anyone who has tried it. Will adding many mix, 43, and 77 spaced cores with a few turns each along the Beverage wire , lower the basic frequency enough to be beneficial?
73
Bruce-K1FZ
http://www.qsl.net/k1fz/beverage_antenna.html
_________________
Topband Reflector Archives - http://www.contesting.com/_topband