[Lowfer] a thought on coils

[Ed Phillips]

> pole capacity dominates. The hat capacity on a typical Lowfer antenna is
> much higher than the pole capacity and there is only a small additional
> amount of inductance needed when the coil is moved up close to the hat. The
> signal strength at a distance is proportional to the effective height. The
> theoretical ratio of signal from a top loaded antenna vs a base loaded
> antenna (assuming plenty of hat capacity) is almost 2X!
> 
> Bill

	You must be talking about some mighty big top hats!  The capacitance of
a 50' TV mast seems to be about 150 pf, and a cylinderical top had
having an equal capacitance would have to be 15 feet in diameter.  To
make the mast capacitance "much smaller than the pole capacitance" would
take a much larger one.  Maybe I haven't been looking at the various
station pictures with a critical enough eye.  Of course, if you string
up a long flat top, as some west coast stations have been known to do in
the past, the situation becomes different.

Ed