Also I remember there is an optimum angle to
droop them to get the
main lobe at the horizon-I want to say between 30 and 45
degrees down
from horizontal. Affects impedance too if I
remember...it's late
The ground plane elements are usually drooped about 45 deg to get the
: [Repeater-Builder] Re: Low Band Base Antenna Info Wanted
To: Repeater-Builder@yahoogroups.com
Date: Monday, August 18, 2008, 5:18 PM
Also I remember there is an optimum angle to
droop them to get the
main lobe at the horizon-I want to say between 30 and 45
degrees down
from horizontal
Thanks to LW, SD, and Eric for answering my request.
Sorry for any confusion, but the antenna as given to me, has no
radials at the present time. I will have to fabricate them.
My original thought was to make the antenna work in its original
frequency range, 30-40 MHz. This would eliminate one
mark_n2mh wrote:
Thanks to LW, SD, and Eric for answering my request.
Sorry for any confusion, but the antenna as given to me, has no
radials at the present time. I will have to fabricate them.
My original thought was to make the antenna work in its original
frequency range, 30-40 MHz.
The mfgrs spec said 2% band-width, which is about 800KHz
at 40 MHz. Hopefully the application doesn't require your
moving around much in the band.
Probably better to find a decent design (and constructed)
CB Antenna to use and the mod to bring it up to 10 meters
is relatively easy. Some of
Hi Mark...
How about you save some aluminum tubing by not cutting the radials too
short for 10 meterscut 4 radials about 1/4 wavelength or so for
your mid-band 10 meter frequency...start with maximum vertical antenna
length and slide the tubing into each other to get your lowest SWR. If
your
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