I strongly encourage you to read Rudy Severns' great work on radials and
top loading. antennasbyn6lf.com
Capacity hat top loading is well proven to beat most (all?) other short
vertical antenna designs for antenna efficiency and 8 elevated radials
can do the job of dozens of buried ones. My 160m wire T short vertical
has about 50KHz of 2:1 bandwidth.
Grant KZ1W
On 8/8/2017 10:08 AM, Bill Straw via TowerTalk wrote:
The sunspots are gone and I need a better 160M transmit antenna. My previous
Cushcraft MA160V
over 50 X 50' radials worked OK for my expectations, but it had a very narrow
bandwidth and the
top loading coil would overheat with more than 500W and shift the resonant
frequency so that
the 2K-FA would go to standby. This antenna is for a new QTH.
According to a Cebik article, a 160M inverted L over 4 x 50' radials has a -2.2
db gain. I think
a -3 db gain would mean half the power would go into the ground? But if I were
running 1500W I
would still be better off from a transmitting standpoint compared to the old
antenna?
Thanks, Bill KO7SS
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