Hi Butch.
Do you have any sense of how performance compares, especially on 80, 40,
and 20 meters which are the primary bands where I presently use the G5RV?
How does it tolerate other structures such as buildings and fences? Is it
a Inverted Vee or a flat top?
The idea of a folded dipole has some appeal because it would likely tame
down the noise a bit.
73, de Lou K2LKK
At 09:07 PM 4/1/2008 -0700, you wrote:
>I haven't kept up on these antennas, been to busy fighting baseball, but
>I had a g5rv here and have the same space limitations, so I put up a b
>and w 1.8-30, which is a broad band folded dipole antenna, I think
>around a hundred feet or a little more. It fits nicely on our 100 foot
>deep lot and the solid state amp loves it. without a tuner.
>73s
>Butch Bussen
>wa0vjr
>
>On Tue, 1 Apr
>2008, Louis Kim Kline wrote:
>
> > Hi.
> >
> > The extra 38 feet of length is a problem here. My yard just isn't big
> > enough to accommodate it. The G5RV goes right to the back fence as it
> > is. I guess that is just the best I'm going to be able to do with the
> > available space.
> >
> > Shucks.
> >
> > 73, de Lou K2LKK.
> >
> > At 02:18 PM 4/1/2008 -0400, you wrote:
> >> The cobra antenna is a folded dipole, they took 3 wire ribbon cable,
> and the
> >> ladder line connects to 1 wire, which goes out about 70 feet, then it's
> >> connected to the center wire which comes back to the center insulator, and
> >> is shorted to the third wire and goes back out again, and they do this for
> >> each side of the ladder line. Both sides are like 70 feet for a total
> of 140
> >> feet with 100 feet of ladder line included so you need to put a ballem at
> >> the end of that to run coax to your station, unless you want to run ladder
> >> line all the way in. I guess when you add up the wire, it's 3 times
> that 140
> >> feet though with it being like ribbon cable, I don't know if that changes
> >> anything or not with it. The original design used Romex, but being single
> >> strand wire, that broke too often but this design looks to me, like it's
> >> rather well built and very easy to make on your own. It's a lot
> lighter than
> >> the g5RV, everyone I know who has them likes them a lot. I'm looking
> forward
> >> to getting mine up.
> >> ----- Original Message -----
> >> From: "Colin McDonald" <[log in to unmask]>
> >> To: <[log in to unmask]>
> >> Sent: Tuesday, April 01, 2008 1:43 PM
> >> Subject: Re: Cobra antennas (was Re: Amplifiers)
> >>
> >>
> >>> what is the difference between the g5RV and the cobra antennas?
> >>> I know how a g5RV is designed, but how is the cobra designed?
> >>> 73
> >>> Colin, V A6BKX
> >>> ----- Original Message -----
> >>> From: "Steve Dresser" <[log in to unmask]>
> >>> To: <[log in to unmask]>
> >>> Sent: Tuesday, April 01, 2008 11:04 AM
> >>> Subject: Cobra antennas (was Re: Amplifiers)
> >>>
> >>>
> >>>>
> >>>> Howard,
> >>>>
> >>>> I've been using the Cobra Ultralite Senior for almost three years, and
> >>> like
> >>>> it very much. Mine plays very well on 80 and 40, and somewhat well
> on 20
> >>>> and 17. I've tried it on 10, and I know it works, but don't really know
> >>> how
> >>>> well as I haven't seen much 10-meter activity here in New England. On
> >>>> 80,
> >>>> where it seems to work best, people give me the same S-meter readings as
> >>>> I
> >>>> give them, which I realize isn't necessarily a good indication of how
> >>> things
> >>>> are working. On some of the other bands, I tend to hear better than
> >>> people
> >>>> hear me, which makes me suspect that maybe the antenna isn't working as
> >>> well
> >>>> as it should.
> >>>>
> >>>> It's an easy antenna to put up, and I have mine strung between two
> trees,
> >>>> about 20 feet off the ground. It might work better if I could raise the
> >>>> center up another 30 feet or so, but I haven't figured out a good way to
> >>>> support the center. Raising the center might also make it play
> better on
> >>>> the higher frequencies, but I won't know unless and until I try it. I'm
> >>>> quite sure I could do better with a beam on a tower, but I have to say
> >>> that
> >>>> this antenna does quite well for a one-size-fits-all antenna.
> >>> Incidentally,
> >>>> I haven't had to repair it even though we get some 50MPH winds
> during the
> >>>> winter.
> >>>>
> >>>> Steve
> >>>>
> >>>> ----- Original Message -----
> >>>> From: "Howard Kaufman" <[log in to unmask]>
> >>>> To: <[log in to unmask]>
> >>>> Sent: Monday, March 31, 2008 18:30
> >>>> Subject: Re: Amplifiers
> >>>>
> >>>>
> >>>>> John I am very interested in the cobra, what do you think of yours?
> >>>>> I'd like to use it on 160 through 10.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> No virus found in this incoming message.
> >>>> Checked by AVG.
> >>>> Version: 7.5.519 / Virus Database: 269.22.3/1354 - Release Date:
> 4/1/2008
> >>> 5:38 AM
> >>>>
> >>>>
> >>>
> >>
> >>
> >>
> >>
> >> --
> >> No virus found in this incoming message.
> >> Checked by AVG.
> >> Version: 7.5.519 / Virus Database: 269.22.4/1355 - Release Date: 4/1/2008
> >> 5:37 PM
> >
> > Louis Kim Kline
> > A.R.S. K2LKK
> > Home e-mail: [log in to unmask]
> > Work e-mail: [log in to unmask]
> > Work Telephone: (585) 697-5740
> >
>
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG.
>Version: 7.5.519 / Virus Database: 269.22.5/1356 - Release Date: 4/2/2008
>4:14 PM
Louis Kim Kline
A.R.S. K2LKK
Home e-mail: [log in to unmask]
Work e-mail: [log in to unmask]
Work Telephone: (585) 697-5740
|
