ZL3IX I think by accident had a fence with a break in it. My not
working Beverage was 4'up over a continuous welded wire fence. Then
some NEC2 modeling of a 600' Beverage 6' above a continuous 3 wire
(wires at 2,3, & 4') barb wire fence, showed poor F/B. Mine was worse
over the welded 6"x 6"
This is interesting. Thanks for sharing, Mikek.
I put down 200 feet of insulated wire BOG pointed at EU, just set it down on
the ground...sometimes over a fallen small tree but almost always within 12
inches of ground.
I fed it with 75 ohm TV cable. I did not terminate it, and I used a KD9SV
Sig
One of the few things I miss about living in New England (don't miss it
enough to own a snow shovel again), Is the 160/80 path to EU
My theory is LA/SM/OH and OJ0 all have a really "long" gray line. right now.
What time did you work OJ0O ?� I just finished my "prototype" N/S R-BOG
Chuck et all
It is well documented that the the NEC-2 based programs leave something
to be desired� with wires on or very near the ground, This includes most
of the EZENEC� family and MMANA-G� Purportedly NEC-4 ( there is a Ezenec
version which runs with NEC 4 engine ... not a cheap date)
Hi There
Two days ago I hooked up the 160m antenna and can report that the season is off
to a start - at least here it is.
Two pages of Eu stations on CW, 5T5 on FT8 - and OJ0O last night also on CW -
RST 599 on 1824.
For some reason the LA's and SM's and OH's are the best signals at this time
My own experience is that a fence does not degrade the Bev pattern too
much as long as the Bev is sufficiently high above the fence wire. I
mount my wires about 3 m above the fence.
I have never modelled an inductively-loaded Beverage, but my intuition
is that it will not perform any better
As long as the fence is pointed in the right direction. :-)
www.w0btu.com/Beverage_antennas.html#Misc_Beverage_antenna_notes
On this page, there are some links to ZL3IX (?) experiences with his
Beverages mounted at different heights above metal fences.
73, Mike
www.w0btu.com
On Sat, Aug 24,
And, by the way, K5GN and W5KU report that their Beverage above a barbed
wire fence is the BEST Beverage at their place.
Chuck W5PR
On Sat, Aug 24, 2019 at 12:41 PM Chuck Dietz wrote:
> I seem to remember someone saying the modelling programs are unreliable
> when a wire is close to the
Good point, Chuck! You are absolutely right. I would have modeled it above
the ground, at least at first.
73, Mike
www.w0btu.com
On Sat, Aug 24, 2019, 12:41 PM Chuck Dietz wrote:
> I seem to remember someone saying the modelling programs are unreliable
> when a wire is close to the ground.
I seem to remember someone saying the modelling programs are unreliable
when a wire is close to the ground. Also, there is really no way to model
the properties of "ground." It can vary in just a few feet and the moisture
content varies from day to day. I think this is a "try it" kind of antenna.
The trick is to take the dc control winding and it's inductance out
of the antenna circuit, which I think can be done with a large bypass
capacitor.
Here's a simple drawing.
The BOG goes to antenna in, through the .47uF cap (Xc=.67ohms at
500kHz, 0.1 ohm at 4Mhz) through variable
The only way to predict the RDF and pattern is by modeling it. I don't know
of anyone who has done this. I have a few of my .ez Beverage models in
w0btu.com/files/ as a starting point, but I don't think that I uploaded
everything there.
There are free antenna modeling programs out there. I have
But what did you mean by "proper pattern"?
I should have said, the best pattern that adjusting the Inductive loads
will provide.
Yes, I understand the pattern changes with frequency. What I want to do
is inductively load the antenna,
so it will have the same pattern as if we increased the
Byron,
I would go with the T (and a good radial field).
George,
AA7JV/C6AGU
On Sat, 24 Aug 2019 14:14:13 + (UTC)
Byron Tatum wrote:
Hello- I hope I do not intrude too much here for a little advice about 160 meter antenna choices. I
am getting settled in to my new QTH and am in process
Hello- I hope I do not intrude too much here for a little advice about 160
meter antenna choices. I am getting settled in to my new QTH and am in process
of getting antenna systems put up. I have a 30' x 50' metal shop building, the
50' length running east/west, sitting on about 4 acres
Ciao Rik,
I don't think fan dipole would contribute to 160 receiving, on the other
hand, 160m legs will decrease useable bandwidth of 80 & 40m dipoles. Have
been there, done that!
73, Mirko, S57AD
V V sob., 24. avg. 2019 ob 08:08 je oseba Riccardo Negro
napisala:
> Hi all, no experience to
Hi all, no experience to share on the subject ?
Thanks.
Rik, IK2CAW
Inviato da Samsung Note.
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