On Sep 7, 11:01*pm, John Smith wrote:
On 9/7/2010 7:04 PM, Art Unwin wrote:

... Just for kicks today I put together 3 rolls of 50 conductor
tape in series without unrolling them so the assembly was about 12
inches tall and 8 inches dia where as the antenna on the tower is
about the size of a bow and arrow target and good for all bands
without being frequency sensitive. ...
Regards
Art

Yeah, but can you shower with it? *See, the other antenna doubles as a
shower, just BYOS (Bring Your Own Soap.)

Regards,
JS

John, all non frequency dependent radiators have to be shielded as it
plays havoc with the cancellation of reactance. But even with the
quick lash up I made where I broke all the rules and even changed to
"stacked pancakes" instead of coils inside coils it still would be ok
for directional use in a loft for some of the bands. Either way the
lash up did not totally destroy its attributes. I suppose it would be
more impressive if I shielded it plus a reflector and put it on the
tower but that was not the point I was trying to make which is the
persistance in keeping non frequency dependentcy
while maintaining a small volume. I modeled a ten turn coil inside
another ten turn coil where both were joined together as a closed
circuit and a overall diameter of 8 to 9 inches sitting on a perfect
ground ala reflector When an antenna is not frequency dependent there
is no skin depth resistance because of the Meissner effect so more
current is applied to generating radiation. This conforming to
Maxwell's law by not indulging in generating magnetic fields. Note
Maxwell never added units of Tesla in his equation so why should you?
By the way that model showed gain inbetween 20 and 30 db because of
current bypassing the innards of the radiator and traveling on the
surface.
So the old timers were correct in saying more wire is better....as
long as you decrease the resistance
created by adding wire!!!!!! That way you have
I sq R instead of I sq R + r which is efficiency in radiation to the
maximum.by removing unnecessary losses. Simple concept eh?
Regards
Art