Program LOADCOIL models short, coil-loaded, vertical antennas.

Amongst other things it allows the coil to slide up and down the
antenna (from the keyboard) and find the coil location at which power
radiating efficiency is maximised.

The best location depends on antenna dimensions, coil dimensions and
ground loss resistance ohms, and is very non-critical. Top loading is
never the best.

Download program LOADCOIL in a few seconds from website below and run
immediately.
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Regards from Reg, G4FGQ
For Free Radio Design Software go to
http://www.btinternet.com/~g4fgq.regp
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Reg Edwards wrote:
Amongst other things it allows the coil to slide up and down the
antenna (from the keyboard) and find the coil location at which power
radiating efficiency is maximised.

Sliding the coil up and down the antenna also changes
the resonant frequency.
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73, Cecil http://www.qsl.net/w5dxp


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