|
Hello Giulio and other LW fers , just
idea
Bring 4 good ceramic insulators on top of the mast
and make a cage of abt 1mx1m and 5-6 meters high
on the insulators . And from there come down with
the slooper in the shack , with 80 meter wire and this top-cap
the coil will be abt 2 - 3 mH . Look on the
pictures gallery of Dave G6YXM to see my antenna 24 meter high.
My top-cap is abt
500 pf the cage is 2 meter diameter and 13 meter high , the shack is 24 meter
from the mast.
I have 5-5-9 from IK5ZPV with 150
Watts.
success from Werner ON6ND
----- Original Message -----
Sent: Friday, January 11, 2002 12:49
AM
Subject: LF: Vertical grounded tower for
LF antenna.
Hi to all,
saturday i have tested the our contest station in Mantova
city in LF, and qso with G in aural CW seems not a problem with a 80 meters
long vertical wire, slooping from the top of the tower, with 150
watts.
But wich may be the best sistem on this tower for LF, is
possible to feed directly it, may be at the top?
The tower is exatly 80 meters long, with a base of 8x8
meters, and at 70 meters is 1x1 meters, and at 80 meters is 0.5x0.5 meters, so
big antenna with big capacitance to ground, i think is a smaller version of
Decca insulated tower, but this one is grounded.
Any idea??
73 to all de Giulio
IK2DED.
| 