"Cecil Moore" wrote in message
...
John Doe wrote:
1] The 160m whip assy that I originally planned to use is
CENTER-LOADED which I think is better than a base loaded whip?

Yep, and a center-loaded 40 ft. long wire is better than
a center-loaded assy shorter than 40 ft. on 160m. There
is no perfect substitute for length and height on 160m.

2] If I decide to go with a 30 or 40 foot length of bare wire up the
tree, How long should the TOPHAT wires be?

As long as you can make them and as many as you can
manage. Best to check the resonant frequency during
the installation process but you are not likely to
make the top hat too big on 160m with a 1/12 wavelength
vertical wire. Resonating the system using only a large
top hat would be ideal. Of course, you will be dealing
with a low feedpoint resistance, too low to be matched
without a ~1:4 unun or equivalent.
--
73, Cecil http://www.w5dxp.com

Could I use the whip configuration as the center load coil, and just add
some more wire to the top end of the whip and more wire to the bottom end??

73's

John Doe wrote:
Could I use the whip configuration as the center load coil, and just add
some more wire to the top end of the whip and more wire to the bottom end??

Using more wire would make for a more efficient antenna
but you would need to short out some turns on the 160m
coil which causes a lowering of the coil Q. Ideally,
you would just use (wind) a lower inductance coil, one
with the exact amount of inductance needed. With a
large top hat and more vertical wire, the size of the
coil is considerably lessened. But shorting out the
unneeded turns on a coil is a time honored tradition.
--
73, Cecil http://www.w5dxp.com

"Cecil Moore" wrote in message
...
John Doe wrote:
Could I use the whip configuration as the center load coil, and just add
some more wire to the top end of the whip and more wire to the bottom
end??

Using more wire would make for a more efficient antenna
but you would need to short out some turns on the 160m
coil which causes a lowering of the coil Q. Ideally,
you would just use (wind) a lower inductance coil, one
with the exact amount of inductance needed. With a
large top hat and more vertical wire, the size of the
coil is considerably lessened. But shorting out the
unneeded turns on a coil is a time honored tradition.
--
73, Cecil http://www.w5dxp.com

1 more question - Instead of using either the fixed 160m stick w/whip
(stinger), or the 30 - 40 ft of wire, what do you think about using a
Screwdriver Antenna at the top of the tree and running either a counterpoise
or radials??
73's

On Mon, 3 Sep 2007 12:56:12 -0400, "John Doe"
wrote:

what do you think about using a
Screwdriver Antenna at the top of the tree and running either a counterpoise
or radials??

Put the screwdriver half to 2/3rds way up, top load, and lay out
whatever radials you can get away with.

73's
Richard Clark, KB7QHC

John Doe wrote:
1 more question - Instead of using either the fixed 160m stick w/whip
(stinger), or the 30 - 40 ft of wire, what do you think about using a
Screwdriver Antenna at the top of the tree and running either a counterpoise
or radials??

The screwdriver coil can certainly be used in the middle
of the 40 foot vertical wire to tune the system to resonance.
Bury some radials and you are in business.
--
73, Cecil http://www.w5dxp.com