Mychael Morohovich wrote:
The method I used was to first tune the antenna with my KAT100 for a
flat SWR, tune the counterpoise for max current at the rig, then tweak
both until the KAT100 reported a flat SWR for the antenna while the
Artificial Ground reported maximum current into the counterp
Vic wrote: "I was making the point that his experiment of unhooking the
counterpoise and measuring the current into the radiator did not indicate
that
the counterpoise was or was not improving antenna performance."
-
The method I use
Ron D'Eau Claire wrote:
Vic, K2VCO, wrote:
Keep in mind that you are measuring the current in the radiator AT A
PARTICULAR
POINT.
-
The counterpoise is tuned for maximum current at the *rig*!
The idea is that the more current flowing into the counterpoise for a given
po
Vic, K2VCO, wrote:
Keep in mind that you are measuring the current in the radiator AT A
PARTICULAR
POINT.
-
The counterpoise is tuned for maximum current at the *rig*!
The idea is that the more current flowing into the counterpoise for a given
power output the lower the RF
Mychael Morohovich wrote:
Instead of a 1/4 wl wire, I use an MFJ Artificial Ground to tune a wire for
maximum current per given band. While measuring, one thing that
surprised me was to discover that with my 86' EFW, the use of a properly
tuned counterpoise didn't always increase the current to
A while back, Ron AC7AC designed, built, and kindly sent me a simple yet
elegant
rf current sensor that operates along with my DMM to give an accurate
quantification of
how my rig is delivering power to the radiator. More current equals more
radiation. One thing it allows me to do is to calculat
David,
Sorry about the confusion.
I was not proposing that the grounded halfwave was a practical solution - my
intent was only to point out that the behavior of RF on a 'counterpoise
wire' is not magic, but follows the same rules as other wires carrying RF,
just like an antenna element, or one
On Dec 10, 2004, at 9:27 AM, W3FPR - Don Wilhelm wrote:
One of the 'funny' properties about RF is that it will always find a
(ground) reference somewhere - that may be from any wire, chassis, PC
board or even your body. Whatever the RF finds convenient will be
used as its ground reference.
Charlie, John and all,
One of the 'funny' properties about RF is that it will always find a
(ground) reference somewhere - that may be from any wire, chassis, PC board
or even your body. Whatever the RF finds convenient will be used as its
ground reference.
The idea of using a proper counte
--- John W2XS wrote:
The 42-foot wire received slightly lower signal reports than the inverted V,
but most people said that they could still hear me fine on the wire. To my
surprise, though, most people reported no real difference with and without
the counterpoise. I don't know if this was a circu
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