I think this is a wording issue. We all understand the difference between
VF in the transmission line and VF in free space.
What caused difficulty was the term "arriving at". I took this to mean "at
the antenna" not free space, as there's no need to mention the antenna if
the desired meaning was
Does the length of a BOG scale linearly? In other words, 100' for 80M?
On 10/1/2015 5:09 PM, Mike Waters wrote:
I fully agree, Chuck. I forget the actual length, but IIRC, 200' is a
commonly used length on 160.
400' or 500' of wire on the earth is much too long to work right on most
types of gr
Hi Chuck,
Of course, W8JI's reply is right on the mark. The Vf of the BOG affects
only signals transiting the BOG wire in transmission line mode, it has
no affect of the placement of BOG antennas in a phased array.
Ideally the broadside spacing should be about 350 feet. End fire
spacing sh
I think this is a wording issue. We all understand the difference between VF in
the transmission line and VF in free space.
What caused difficulty was the term "arriving at". I took this to mean "at the
antenna" not free space, as there's no need to mention the antenna if the
desired meaning was
I believe there is a large influence of height above ground on VF.
From a theoretical basis, this has been "known" since Wise's classic paper
"Propagation Of High Frequency Currents In Ground Return Circuits" (1934).
This was experimentally verified in the Litva and Rook report from the CRC
(Can
I fully agree, Chuck. I forget the actual length, but IIRC, 200' is a
commonly used length on 160.
400' or 500' of wire on the earth is much too long to work right on most
types of ground.
73, Mike
www.w0btu.com
On Thu, Oct 1, 2015 at 4:06 PM, Chuck Hutton wrote:
> Frank:
> I believe there is a
Frank:
I believe there is a large influence of height above ground on VF.
>From a theoretical basis, this has been "known" since Wise's classic paper
>"Propagation Of High Frequency Currents In Ground Return Circuits" (1934).
This was experimentally verified in the Litva and Rook report from the
Hi Art,
Signals arriving at the BOGs are not travelling in the ground, therefore
their velocity of propagation (Vp) is unaffected by the ground.
B roadside spacing should be 350 feet.
Echelon spacing should be 70 to 130 feet, using W8JI crossfire-
echelon phasing. 140 foot spacing signif
I was thinking about phased BOGs.
Would the horizontal spacing and/or stagger between them, be reduced due to
the Vp change from ground proximity?
Art NK8X
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