73
Frank
W3LPL
Original message
>Date: Mon, 17 Jan 2011 03:58:14 -0800 (PST)
>From: Mike Waters W0BTU
>Subject: Re: Topband: First attempt at beverage antenna, not working as
>expected
>To: Mark Lunday , topband@contesting.com
>
> Mark,
>
>I went back and s
Hi All,
I'm sure that the Epsom salts trick works well, but seems to require
quite a high level of maintenance. At my remote Rx site I use multiple
ground rods to terminate my Beverages. I find that using 3 rods, then
bringing the termination resistance back up to the 500 ohm that it
should
Just a few comments to Mark WD4ELG:
I too have a single short Beverage, about 350' over clay soil and sloping up a
hill to the west, fed with about a quarter mile of RG58. It's really too short
for top-band, but it does work. Myself and some other Gs have been carrying out
daily long path test
Mark,
I went back and studied Greg Ordy's page at
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/Beverage.htm
at length. From his chart and animated GIF, it appears that merely adding
another 25 or 50 feet onto your 250' Beverage might do wonders for it on 160.
(Having
From: Rik van Riel
To: topband@contesting.com
Sent: Sun, January 16, 2011 8:39:44 AM
Subject: Re: Topband: First attempt at beverage antenna, not working as expected
On 01/15/2011 09:44 PM, Mark Lunday wrote:
http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/Beverage.htm
you, if you decide to
go
that route rather than radials.
73,
Mike Waters
www.w0btu.com
From: Mark Lunday
To: Mike Waters W0BTU
Sent: Sun, January 16, 2011 11:03:44 PM
Subject: RE: Topband: First attempt at beverage antenna, not working as expected
Wow
I
First, thanks to ALL on this list who responded. I received more than 20
replies with suggestions and guidance.
Second, I used my MFJ-259 to measure the SWR from the shack. I was shocked
at what I found. Instead of 2:1 or less from 160-40, I had 8:1 SWR. This
indicates a fundamental issue with
s
www.w0btu.com
From: Mark Lunday
To: topband@contesting.com
Sent: Sat, January 15, 2011 8:14:09 PM
Subject: Topband: First attempt at beverage antenna, not working as expected
My first beverage, I was expecting better results.
I could only roll out 250 feet of new, insulated 14 gauge stran
>My first beverage, I was expecting better results.
Hello, Mark and others!
I agree with others that your BV is too short, but
.
What is your grounding system?
How long a grounding rods? What kind of ground surface do you have over
there?
I would be separating the problems here
.
F
tealey
>Subject: Re: Topband: First attempt at beverage antenna, not working as
>expected
>To:
>
>
>Sounds like "maybe" something is not working. If you have an antenna analyzer
>can you do a sweep from 160 up to 40 m? There should be a relatively flat
>SWR ov
On 01/15/2011 09:44 PM, Mark Lunday wrote:
> Additional notes:
>
> EU stations that I can hear S7 on the 80 meter half-square, are reduced to
> NIL on the beverage.
>
> I can hear some US stations to the NE.
That seems consistent with a half wave beverage having
a really really high takeoff angle.
Sounds like "maybe" something is not working. If you have an antenna analyzer
can you do a sweep from 160 up to 40 m? There should be a relatively flat
SWR over the whole range. Without the far end terminated the impedance and
therefore the SWR will flop all over the place. That would show yo
> My first beverage, I was expecting better results.
Most will mention 250 feet is too short and that might be the reason as it
will not match 9:1 or that 450 Ohm resistor.
A working beverage is easy to recognize as the noise drops to zero and signals
really "pop" out of the noise. They are mag
Hi Mark,
250ft is VERY short for a TB Beverage. You will get some F/B, but the
front lobe will be very broad. Can you extend it at all, maybe asking
some kind neighbours to use a bit of their land? 500 ft is really about
minimum and 1000 ft even better.
73, Greg, ZL3IX
On 2011-01-16 15:14,
Additional notes:
EU stations that I can hear S7 on the 80 meter half-square, are reduced to
NIL on the beverage.
I can hear some US stations to the NE.
_
From: Mark Lunday [mailto:mlun...@nc.rr.com]
Sent: Saturday, January 15, 2011 9:14 PM
To: 'topba
My first beverage, I was expecting better results.
I could only roll out 250 feet of new, insulated 14 gauge stranded wire, but
I did get it consistently about 6 feet above ground. The ground slopes away
at about 10 degrees angle and at the end of the wire the slope increases to
35 degrees and go
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