Lou, you might want to consider reading the article on optimising the
g5rv from the following link
http://www.vk1od.net
he has a number of things you can read up on there relating to antennas
and the like.
hth
Shaun
web sites:
http://www.myspace.com/blindmanshaunoliver
http://blindman.homelinux.org/~blindman/
skype: brailledude
On 2/04/2008 11:55 AM, the old scribe known as Louis Kim Kline was able
to impart this pearl of wisdom:
> 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.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>> --
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>>> 5:38 AM
>>>>
>>
>>
>>
>> --
>> No virus found in this incoming message.
>> Checked by AVG.
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>> 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
>
>
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