In , Lancer
wrote:

On Wed, 21 Jan 2004 12:59:56 -0500, "Jerry Oxendine"
wrote:

Those BIG coil antennas aren't as efficient as the makers
make them out to be, but they sell antennas because bigger is "better",
right? Lots of smoke and mirrors, eh?


Jerry


Depends on what claims they are making. Bigger air wound coils are
more efficient. A big air wound coil should have a Q of 300, or bit
more. A 5' or 6' foot antenna with a coil that has a Q of 300 will
have close to the same bandwidth and efficiency of a 1/4 antenna.


Not when that coil is mounted perpendicular to a huge piece of steel. Were
talking ferromagnetic action coupled with huge eddy-current losses.






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