I agree that the antenna seems too long. When shortening an antenna,
it's a good idea to take off small amounts (25mm or so) at a time.
Also, the suggestion to fold the ends of the antenna back rather than
cut them off is a good one.
Also, it's always good to have independent confirmation before making
changes. That way you don't have to go out in a snowstorm to shorten an
antenna and then find yourself going out again a few minutes later to
make it even shorter and then, after several snowy trips outside,
figuring out that no matter how much you take off the ends, the antenna
would still be too short. (I want to say that was during the 1982
November Sweepstakes, it was in another state, and I wasn't the one
doing the shortening.)
On 5/9/2017 10:11 AM, NIzar Mullani via BVARC wrote:
Gayle,
The Alpha Delta wire dipoles are cut for the CW portion of the bands.
This way, you can cut them shorter to work on the SSB portion of the
band.
Nizar
*From:*BVARC [mailto:bvarc-boun...@bvarc.org] *On Behalf Of *Gayle
Dotts via BVARC
*Sent:* Tuesday, May 9, 2017 8:02 AM
*To:* BRAZOS VALLEY AMATEUR RADIO CLUB
*Cc:* Gayle Dotts
*Subject:* Re: [BVARC] Inverted V dipole orientation
Put an SWR meter to the 10 meter Alpha Delta DX-EE, results:
Set to CW
28.488 2.9
28.360 3.0
28.300 3.1
the dipole is at 8 feet each side.
Any Advise?
Gayle
KF5LVZ
On Mon, May 8, 2017 at 11:35 AM, Gayle Dotts <gayle.do...@gmail.com
<mailto:gayle.do...@gmail.com>> wrote:
Thank you guys. I orientated the wires so that I could with
little effort switch directions to accommodate. The degree of
angle off straight up and down I can play with. Elevation on the
mast in an inverted V is around 35 feet.
Gayle
KF5LVZ
PS: I will say this from a 10M rotatable MFJ 1980 Moxon type
antenna to now a new Alpha Delta DX EE........
For observations on the 20M, 40M and 80M........traffic feels like
it has increased 70% on all bands with stations I had not heard
before or the ability to hear before. The 10M I will have to
observe using the 10M nets coming up to comment on.
On Mon, May 8, 2017 at 10:52 AM, Jonathan Guthrie via BVARC
<bvarc@bvarc.org <mailto:bvarc@bvarc.org>> wrote:
As far as the North/South vs East/West question goes, if you
know where you want your signal to go, then you should
absolutely orient your dipole broadside to that direction. If
you don't know where you want your signal to go, or don't yet
care, then do what people typically do and put it up in
whichever direction is most convenient. If you've got the
money, the time, and the space, you can always set up two of
them at right angles to each other and switch between them,
depending on which one brings in the louder signal.
As far as making it straight goes (I think that's what you're
asking, if it's not, then please correct me) then as long as
the legs aren't too close together it won't have a huge effect
on the radiation pattern. A right angle is probably not "too
close". I don't believe that the radiation will be
substantially less efficient, but you may get the energy
directed in a peculiar direction. The thing is, unless you
know what you're trying to achieve, the thing to do is to put
something up and see what you get. If you find that you
communicate really well to nowhere you want to talk to, then
consider making changes or even trying your hand at some
modelling to see what it's really doing.
The thing to understand is that all antennas interact with the
environment that they're in. That means that unless it's well
isolated from nearly everything your signal will go off in
weird directions because it's near the metal in your house or
a shed or a fence or whatever. Trying to anticipate that is
of limited use, and probably not worth the effort until you
know what you're trying to do.
On 5/7/2017 8:18 PM, Gayle Dotts via BVARC wrote:
Setting up a inverted V multiband dipole 30 feet in the
air and was wondering should I orient the wires to begin
with so broadside to the dipole is North and South or
should I orient it for East and West broadside? I do know
that broadside is where most of my signals will come
from...or does it really matter?? Also usually one sets
up dipoles wires so the combined asmith is close to 180
degrees. Can I do a 90 degree combined asmith...... or
will that decrease my signals?
Thank you for your thoughts guys, I appreciate it!
Gayle Dotts
KF5LVZ
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