i was actually considering using 75 ohm coax as the transmition line.
Shaun
web sites:
http://www.myspace.com/blindmanshaunoliver
http://blindman.homelinux.org/~blindman/
skype: brailledude
On 30/03/2008 1:28 PM, the old scribe known as Louis Kim Kline was able
to impart this pearl of wisdom:
> Hi Shaun.
>
> I couldn't tell you exactly to the inch, but it was around 67 ft. for the
> 40 meter antenna, and around 130 ft for the 75 meter antenna. If you
> calculate it for 3800 KHz and 7100 KHz, it will work.
>
> Mine was up 35 feet at the feed point and sloped off to for metal fence
> posts driven in the ground a few feet beyond the end points of the inverted
> vees. I used end insulators and ropes to attach the ends to the
> posts. Although theory says you should use a balun on such an antenna, I
> never bothered to put one on the antenna, and never had any problems with
> it. I left that antenna for my sister (KA2GLP) when I moved into the
> city, and she is still using it.
>
> 73, de Lou K2LKK
>
>
>
>
> At 10:46 PM 3/28/2008 +1100, you wrote:
>> what were the rough lengths of your dipoles?
>> for me to work it out in meters, I use the formula 300 divided by f.
>> also, did you use any baluns? I want to make my own but not quite sure
>> how to accomplish that just yet, I need to make sure the toroid I use is
>> the right rating and size. thanks in advance.
>>
>>
>> Shaun
>> web sites:
>> http://www.myspace.com/blindmanshaunoliver
>> http://blindman.homelinux.org/~blindman/
>> skype: brailledude
>>
>>
>> On 28/03/2008 9:15 PM, the old scribe known as Walt Sebastian was able
>> to impart this pearl of wisdom:
>>> Hi Shaun,
>>> I had a temporary antenna up for five years or so. It was cut for 75, 40
>>> and 20. Before you cut different antennas for 10 and 15, check the SWR on
>>> your lower band antenna and see if it is ok. 40 should resonate on 15 and
>>> 75 may resonate on 10. Don't quote me but it is a possibility.
>>>
>>> I got on a rag chew group on 10 meters with a group. The only antenna
>> that
>>> I had cut for that band was a 4 band vertical. I would transmit on it and
>>> listen on my 75 meter dipole. One time I forgot to switch back and I was
>>> asked what I did. I told them. A friend came over and was going to build
>>> me a small 10 meter inverted vee but he checked the SWR on my 75 meter
>>> antenna and it showed a very good reading. He said, you don't need a 10
>>> meter antenna, you got one. I hope this helps, 73.
>>>
>>> Walt
>>> WA4QXT
>>> New London CT
>>> [log in to unmask]
>>>
>>>
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>>>
>>
>>
>>
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>> 5:02 PM
>
> Louis Kim Kline
> A.R.S. K2LKK
> Home e-mail: [log in to unmask]
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>
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