Hi Tom,
You're right on, the Gap always is a poor performer on it's lowest
designated band and OK on the next bands up. The reason is simple. The
mini-RG8X foam coax GAP uses internally for matching gets REAL hot meaning
that is where the power is going (to heat the matching transformer-not to
heat the onosphere!) and guess what? At about 1000 watts of applied power
on one we tested, the coax matching transformer MELTED and that was the end
of the antenna. Enough said!
73,
Joe, W1JR
At 08:58 AM 10/9/99 -0600, n4kg@juno.com wrote:
>
>The main problem with the GAP antennas is that
>on the LOWEST BAND they use INDUCTIVE loading
>at the feedpoint which is the least efficient method of
>loading a short antenna.
>
>This inductive loading is realized by transforming a
>Capacitive Reactance through a transmission line
>which presents an Inductive Reactance at the feed point.
>
>K5FUV wrote an excellent review of his GAP in the
>January 1995 issue of QST on page 75.
>
>Most users report poor performance on the LOWEST
>band of operation with their GAP Antennas.
>
>de Tom N4KG
>
>
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