Hi Jerry,
65% is in the wheelhouse for DOG VF's. 400 to 600 ohms seems high. In the
12 county area around Raleigh/Durham/Chapel Hill, we measured 120 - 200
ohms resonant R.
The variation you experienced, and also high R readings could be explained
by a few nicks in the wire insulation toward the
K2AV said:
"Measured resonance of a fixed length gave us velocity factor (VF) and
other data. VF's based on those measurements ranged from 45% to 85%.
That huge variability certainly explained the BOG experience, and
suggested a solution, but that's another subject."
When I did those tests
Hi Wes,
Thanks for posting up the Severns material. I had started looking for that,
but without memory of exact words (which makes searching difficult), and
without absolute certainty that Rudy was who I heard it from. You likely
saved me an entire working day. If you're ever in the area, that's
I am going to add what may be a meaningless post to this thread.
I live on a 1/4 acre lot in the black hole of San Jose California. Until very
recently I was using a base loaded 1/8 wave vertical for 10 years. The vertical
is on the side of the house 10 feet from the property line. I run eight
I guess I should have added "useful to me." At my location, I wouldn't dream of
having elevated radials less than 6 feet above ground. Running them through the
cactus and bushes could be just as difficult as on the ground, especially when
they need to be considerably longer. There also needs
Hi Wes,
I have also always had the highest regard for 99.9% of anything that W8JI
has stated.
However, I feel exactly the same way about K2AV (and, of course, Rudy too).
In this particular case, I am inclined to listen to Guy and the others here
who have discussed and used the FCP.
Probably,
On 7/25/2019 12:01 PM, Wes wrote:
As to gull wing radials, Rudy Severns has looked at these too:
https://www.antennasbyn6lf.com/files/antenna_ground_system_experiment_5.pdf
Rudy's work is a treasure trove and I think I have everything he's
written in a folder on my hard drive. Believe me,
Personally, I would and do, avoid a FCP antenna. W8JI has done some analysis on
these and I value his insight.
http://www.w8ji.com/fcp_folded_counterpoise_system.htm There is simply too much
handwaving going on to suit me.
As to gull wing radials, Rudy Severns has looked at these too:
-
From: "Mark K3MSB"
To: "topBand List"
Sent: Thursday, July 25, 2019 5:04:33 PM
Subject: Topband: FCP vs Gull Wing Elevated Radials
This kind of goes with the other thread that has morphed into the FCP
topic, but is a bit different.
With an FCP feeding the INV-L, the
This kind of goes with the other thread that has morphed into the FCP
topic, but is a bit different.
With an FCP feeding the INV-L, the bottom of the INV-L will be at least 10
feet off the ground.With my existing trees I can barely get up 50 feet
from the ground. So, the INV-L will have 40
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