Hi Tom et al,
I have an 80 Meter inverted Vee.
Are you saying that if I take the side of my vee that
is connected to the coax shield and bring it straight down
and ground at the bottom it would work better for DX than
the inverted vee configuration???
I hope that is the case because my inverted vee is not very
good for dx work.
Thank for any input on this.....
73,
Ted K2QMF
On Wed, 15 Sep 2010 11:53:56 -0400 Tom Haavisto <kamham69@gmail.com>
writes:
> I have an inverted vee installed on a 48 foot tower - apex is around
> 45 feet.
> On another (64 foot) tower, I have 2 half-slopers - one for phone,
> one for CW.
>
> I have found the half-slopers work very well working DX, and have
> been
> my primary 80 meter antennas for a number of years. Also work well
> for working North America
>
> I installed the inverted vee about a year ago so I could do some
> A/B
> comparisons.
>
> Working DX, the slopers are far better. i was listening to a local
> about 30 miles away running QRP. He was about S2 on the sloper, S9
> on
> the inverted vee. For most of my operating, I end up using the
> sloper.
>
> One thing I also did was to install a number of radials around the
> tower with the slopers. For a relatively simple antenna, it works
> very well. Given a choice, the inverted vee would be the first one
> to
> go away.
>
> Tom - VE3CX
>
>
>
>
> On Sat, Sep 11, 2010 at 1:56 PM, <RLVZ@aol.com> wrote:
> >
> > Hi Guys,
> >
> > I'd appreciate your thoughts and recommendations on the following
> 80-meter
> > antenna setup:
> >
> > I operate portable from a QTH in Wisconsin for several weeks each
> year.
> > This site has a short 50' tower, a small Hy-Gain TH-3 Mk3
> Tribander on top,
> > and non-conductive guy wires. For a 80 meter antenna I've been
> using an
> > Inverted V with apex at 47' and the ends at 15' above ground.
> This 80-meter
> > Inverted V seems to work pretty well on Stateside q's and fairly
> well on
> > DX... but I've never done an A/B comparison with another antenna
> to compare
> > results. I base my results on how well it busts pileups in
> contests.
> >
> > Thought: Most people I've heard of who have modeled Inverted
> Vee's
> > typically say "the Inverted Vee is a poor performer" and "you're
> much better off
> > with a flat-top dipole". But a few people contend that an
> Inverted Vee has
> > some vertical polarization which lowers the angle of radiation.
> So in
> > this case, if the flat-top dipole was at 47' (less than a quarter
> wave) it
> > would still be a cloud warmer.
> >
> > Question: Since the flat-top dipole at 47' would be a cloud
> warmer, it
> > seems to me that even if the Inverted Vee only had a very small
> amount of
> > vertical radiation that the low Inverted Vee could perform as
> well as or better
> > than the low dipole on qso's over 1,000 miles. Do you agree that
> the low
> > Inverted V might outperform the low flat-top on q's of a 1,000
> miles or
> > more? If anyone has done A/B comparisons on a low Inverted Vee
> vs. a low
> > flat-top dipole please share the results. I am thinking that
> modeling software
> > may not give the Inverted Vee any allowance for vertical
> polarization...
> > which could be why they often model poorly.
> >
> > I'd really appreciate it if anyone had A/B comparison information
> you
> > could share on a low Inverted Vee do compared to low flat-top
> dipoles. I
> > relaize I could shunt feed this tower but that would require
> radials and it's
> > more work than I'd like to invest into a portable antenna.
> >
> > Thanks & 73!
> >
> > Dick- K9OM/9
> > _______________________________________________
> >
> >
> >
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> >
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