Hi Tom.
With a inverted Vee cut for about 3800 KHz, and one cut for about 7100 KHz,
placed perpendicular to each other and fed with one coax, i.e. one leg of
the 80 and one leg of the 40 tied to the center conductor and the other leg
of the 80 and the other leg of the 40 tied to the braid, I could work 80,
40, 30, 20, 17, 15, 12, 10, and 6 meters with a tuner. Actually, without a
tuner the antenna would do 75 meters, 40 meters, 15 meters, and 6
meters. This is an antenna that works well enough that if you have a tube
rig with a pi-network, you can load it straight into the antenna and it
will work.
I had mine strung up over a mast that came off the top of a horse barn at
the last place I lived, and the inverted vees served both as radiating
elements, and as guys for the mast so the antenna was very stable even in
high winds.
I had a G5RV up at that location, and on most bands the inverted vees far
outperformed the G5RV, especially on 10 meters.
That antenna configuration is, bar none, my favorite antenna configuration,
and if I had the space here, I'd be running it because it works like a champ.
73, de Lou K2LKK
At 01:51 PM 4/5/2006 -0700, you wrote:
>Louis,
>How many bands could you use on the inverted V? If I have to put in phone
>poles I might use something other than the G5RV, but what else would give
>me so manybands?
>Tom
>
>
>On Sun, 2 Apr 2006, Louis Kim Kline wrote:
>
> > Hi.
> >
> > Man, if I had that much space, I'd have my old crossed inverted V's for 80
> > & 40 again. Feeding them with on common coax and getting the feed point up
> > about 35 ft., they would outperform a G5RV any day of the week. I only use
> > a G5RV because I can't cram anything larger into my city lot.
> >
> > 73, de Lou K2LKK
> >
> >
> >
> > At 04:37 PM 4/2/2006 -0400, you wrote:
> >> Tom,
> >>
> >> A non metal mast is great but you can get by with metal if you use
> standoffs
> >> to keep the twin lead away from it. Even if you only use 1 or 2 at the
> >> top of the mast and then pull the lower portion of the twin lead away at a
> >> slight angle. The higher you can go, the better.
> >>
> >> If I may ask: If you have 300 feet of property, why limit yourself to a
> >> G5RV? Most of us have used one at one time or another and some hams
> think
> >> it is the greatest thing ever, but it is a compromise. There are some
> >> killer antennas that you can put up in that space.
> >>
> >> As for the vertical: The problem with used antennas is that you never know
> >> who did what to it in a previous life. Adjustments made to suit a
> >> particular installation may not work for you. I'd be concerned about
> >> coroded joints. I'd take it apart and clean all metal to metal
> joints and
> >> connections and coat all joints with penatrox or similar. Put back
> >> together per factory settings.
> >>
> >> 73, Steve KW3A
> >> ----- Original Message -----
> >> From: "Tom Karnes" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Sunday, April 02, 2006 3:54 PM
> >> Subject: Re: antenna problem
> >>
> >>
> >>> Thanks for all six of the responses I have received so far. The Kenwood
> >>> 850 has an internal antenna tuner. It worked fine last year at Handihams
> >>> radio camp in Malibu. That was with a G5RV. The R7 is just like it was
> >>> when I acquired it from the estate of silent key Bob Larson, except for
> >>> one joint half way up the mast and the 10 radials at the base. Would
> >>> polishing up the surface do any good or does rf not care? I couldn't use
> >>> it San Francisco because my lot was only 22 feet wide, but now I have 75
> >>> by 300 feet. First I'll try the suggestion from two of youto put the twin
> >>> lead straight and perpendicular to the long line, but at an angle to the
> >>> ground. I's new and connects directly to the transmitter. I've used two
> >>> different coax cables on the R7 with identical results. The ground is
> >>> fine. I could get the G5RV higher if I could figure out what to use as a
> >>> non-metallic mast. Any ideas? Would it be worth buying an external
> >>> antenna tuner to use instead of the internal a t in the K850?
> >>> Again, thanks for all the quick help. I don't stay on this list because
> >>> there is too much traffic for me to add to what else is coming through,
> >>> but it is great to get back on now and then. I'm always available at
> >>> [log in to unmask]
> >>> Tom Karnes K6FUN
> >>> 73
> >>>
> >>>
> >>>
> >
> > Louis Kim Kline
> > A.R.S. K2LKK
> > Home e-mail: [log in to unmask]
> > Work e-mail: [log in to unmask]
> > Work Telephone: (585) 697-5753
> >
Louis Kim Kline
A.R.S. K2LKK
Home e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Telephone: (585) 697-5753
|
