Topband: Beverage construction

[fmoeves]

While working in the back yard this morning I wanted to take down a couple dead 
trees. Things didn't work out the way I wanted. One of the trees fell on one of 
the Beverages. This Beverage was put up after following Steve's Ve6wz 
construction tips. I had a copy of Steve's pulley system. And it worked great 
cut the tree close to the wire pulled it out from under the tree. And all is 
well...right back in business. Thanks Steve I'm glad I was paying attention to 
those tips. 73 Fred KB4QZH 
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Re: Topband: Beverage construction

[Mike Waters]

Exactly! Doing that creates impedance mismatches at each end.
Now, if your aim is to trip people or animals, slope it. ;-)

73, Mike
www.w0btu.com

On Nov 27, 2017 4:55 PM, "Donald Chester"  wrote:


>  did you slope the last 50' on each end?

Sloping the ends of a beverage serves no useful purpose.  That's an old
wives' tale ...
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Re: Topband: Beverage construction

[Donald Chester]

Thu Nov 23 13:42:27 EST 2017 Dave k4em at bellsouth.net wrote:
>  did you slope the last 50' on each end?

Sloping the ends of a beverage serves no useful purpose.  That's an old wives' 
tale (or maybe I should say old Hammy Hambone's tale) started by W1WCR, I 
believe.  Whether the wire is horizontal all the way to eacd end  with a 
vertical lead straight down to the ground point, or 50' of sloping the wire at 
each end, you have exactly the same vertical and horizontal component of wire.  
Precisely why a Pennant antenna and a Flag antenna of the same total height and 
length perform approximately the same.  The only advantage to the sloping wire 
is that the sloping antenna itself acts as a guy wire for the end poles, 
eliminating the need to terminate each end of the antenna with a separate guy 
wire.  But the long gradual slope makes the antenna wire more hazardous to 
surface traffic than a short guy wire at each pole.

Don k4kyv
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Re: Topband: Beverage construction

[Mike Waters]

This is great advice, Greg!

On Fri, Nov 24, 2017 at 7:32 PM, Greg Chartrand via Topband <
topband@contesting.com> wrote:

> Carol,
> What kind of transformer are you using? The best transformers are the
> binocular core transformers that have separate primary and secondary
> isolated winding's.
> Did you keep the coax shield disconnected from the ground rod? The
> secondary should connect the beverage one one wire and ground rod on the
> other. The primary should have the coax center and shield NOT connected to
> anything else.
> Are you sure your shield is intact? Check continuity.
> GregW7MY
>

73, Mike
http://www.w0btu.com/Beverage_antennas.html
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Topband: Beverage construction

[Greg Chartrand via Topband]

Carol,
What kind of transformer are you using? The best transformers are the binocular 
core transformers that have separate primary and secondary isolated winding's.  
Did you keep the coax shield disconnected from the ground rod? The secondary 
should connect the beverage one one wire and ground rod on the other. The 
primary should have the coax center and shield NOT connected to anything else.
Are you sure your shield is intact? Check continuity.
GregW7MY

 Subject: Topband: Beverage constructionMessage-ID: 

Content-Type: text/plain; charset=utf-8; format=flowed

Hello all,


I finally put up a beverage antenna...about 400 feet long. I am feeding 
it through a 9:1 transformer with some 50 ohm cable ( RG 59). I am 
finding that it is noisier than my transmit antenna, contrary to what it 
should be. The wire stays about 6-8feet above ground. ground rods at 
each end, etc.

Any thoughts on the problem and a cure?


Thanks,


Carol

- Greg Chartrand - W7MY 
Richland, WA. W7MY Home Page: http://webpages.charter.net/w7my/

 
   
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Re: Topband: Beverage construction problem solved

[Mike Waters]

Glad to hear that you solved this. :-) If everything's working you'll
notice a BIG difference in hearing low-angle weak signals 800 miles away, *and
especially way beyond that distance!* It's all about improving your RX S/N
ratio.

If you don't, then where is your Beverage pointed, and what state are you
in? My signals from SW MO are only about 10 dB down (when pointed towards
Europe, for example). You'll see why I'm asking this at
www.w0btu.com/Beverage_antennas.html#Misc_Beverage_antenna_notes

73, Mike
www.w0btu.com

On Fri, Nov 24, 2017 at 3:06 PM, Carol Richards  wrote:

>
> Hello all and many thanks for your solutions to my beverage problem.
>
>  It turned out that I had a bad transformer and several bad F-fitting
> connections.  It was the first time I had ever used a tool for this
> purpose. Noise is gone on the beverage and as expected signals on the
> beverage are much lower than on the transmit. How well it will work...I'll
> just have to see...lol
>
>
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Re: Topband: Beverage construction problem solved

[Carol Richards]

Hello all and many thanks for your solutions to my beverage problem.

 It turned out that I had a bad transformer and several bad F-fitting 
connections.  It was the first time I had ever used a tool for this 
purpose. Noise is gone on the beverage and as expected signals on the 
beverage are much lower than on the transmit. How well it will 
work...I'll just have to see...lol



Again, many thanks to all...


Carol
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Re: Topband: Beverage construction

[Ed Sawyer]

I have found that a common source of noise on beverage systems is the need
to use the small F type connectors and the crappy F type coax that is often
on the jumpers as well as just converting it all to the final input to your
receiver.

 

Try the simplest but clean and checked coax directly from the beverage to
the receiver first to see if there is any noise.  Then add in the elements
that might be present on the normal way into the shack and through any items
along the way.

 

I had a high pass broadcast filter that was the cause of noise at one point.

 

A beverage with no preamp should be MUCH quieter than your transmit antenna
on 80.  In my case it's a 6 S unit drop.

 

Ed  N1UR

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Re: Topband: Beverage construction

[CT1EKD]

Hi
RG59 is 75 ohm and RG58 is 50/52 ohm. I'm sure the noise is not coming  
from this difference, but swr may be there..


Pedro - CT1EKD







Citando Carol Richards :


Hello all,


I finally put up a beverage antenna...about 400 feet long. I am  
feeding it through a 9:1 transformer with some 50 ohm cable ( RG  
59). I am finding that it is noisier than my transmit antenna,  
contrary to what it should be. The wire stays about 6-8feet above  
ground. ground rods at each end, etc.


Any thoughts on the problem and a cure?


Thanks,


Carol

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Re: Topband: Beverage construction

[Arthur Delibert]

Carol – Regarding the use of ferrite chokes to kill common-mode noise coming in 
on the transmission line, look  on the internet for “A Ham's Guide to RFI, 
Ferrites, Baluns, and Audio Interfacing,” by Jim Brown, K9YC.  It’s a very good 
tutorial on how to construct and use chokes for common-mode noise.

--Art Delibert, KB3FJO

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: JC<mailto:n...@comcast.net>
Sent: Thursday, November 23, 2017 2:58 PM
To: 'Carol Richards'<mailto:n...@comcast.net>; 
Topband@contesting.com<mailto:Topband@contesting.com>
Subject: Re: Topband: Beverage construction

Hi Carol

The big issue with any RX antenna is common mode noise, the feed line can
interact with all other wires in your station, including AC wires 115Vac,
rotor cables etc.

Try this, on 9:1 transformer, remove  the beverage wire and connect a 450
resistor. Removing the wire for the resistor de signal coming from the RX
antenna should be zero. Turn the preamplifier on, any noise you hear is not
coming from the antenna and it is common mode noise that you need to clean.

Choke can help a lot if you have a good ground connection.

73's
JC
N4IS

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carol
Richards
Sent: Thursday, November 23, 2017 12:36 PM
To: Topband@contesting.com
Subject: Topband: Beverage construction

Hello all,


I finally put up a beverage antenna...about 400 feet long. I am feeding
it through a 9:1 transformer with some 50 ohm cable ( RG 59). I am
finding that it is noisier than my transmit antenna, contrary to what it
should be. The wire stays about 6-8feet above ground. ground rods at
each end, etc.

Any thoughts on the problem and a cure?


Thanks,


Carol

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Re: Topband: Beverage construction

[JC]

Hi Carol

The big issue with any RX antenna is common mode noise, the feed line can
interact with all other wires in your station, including AC wires 115Vac,
rotor cables etc. 

Try this, on 9:1 transformer, remove  the beverage wire and connect a 450
resistor. Removing the wire for the resistor de signal coming from the RX
antenna should be zero. Turn the preamplifier on, any noise you hear is not
coming from the antenna and it is common mode noise that you need to clean.

Choke can help a lot if you have a good ground connection.

73's
JC
N4IS

-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carol
Richards
Sent: Thursday, November 23, 2017 12:36 PM
To: Topband@contesting.com
Subject: Topband: Beverage construction

Hello all,


I finally put up a beverage antenna...about 400 feet long. I am feeding 
it through a 9:1 transformer with some 50 ohm cable ( RG 59). I am 
finding that it is noisier than my transmit antenna, contrary to what it 
should be. The wire stays about 6-8feet above ground. ground rods at 
each end, etc.

Any thoughts on the problem and a cure?


Thanks,


Carol

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Re: Topband: Beverage construction

[Dave]

What value termination resistor, how far did you drive the ground rods, did you 
slope the last 50' on each end?


Sent from my Verizon 4G LTE Droid
On Nov 23, 2017 12:36 PM, Carol Richards  wrote:
>
> Hello all, 
>
>
> I finally put up a beverage antenna...about 400 feet long. I am feeding 
> it through a 9:1 transformer with some 50 ohm cable ( RG 59). I am 
> finding that it is noisier than my transmit antenna, contrary to what it 
> should be. The wire stays about 6-8feet above ground. ground rods at 
> each end, etc. 
>
> Any thoughts on the problem and a cure? 
>
>
> Thanks, 
>
>
> Carol 
>
> _ 
> Topband Reflector Archives - http://www.contesting.com/_topband 
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Topband: Beverage construction

[Carol Richards]

Hello all,


I finally put up a beverage antenna...about 400 feet long. I am feeding 
it through a 9:1 transformer with some 50 ohm cable ( RG 59). I am 
finding that it is noisier than my transmit antenna, contrary to what it 
should be. The wire stays about 6-8feet above ground. ground rods at 
each end, etc.


Any thoughts on the problem and a cure?


Thanks,


Carol

_
Topband Reflector Archives - http://www.contesting.com/_topband

Topband: beverage construction

[Jorge Diez - CX6VM]

Hello

 

I was Reading http://www.w8ji.com/beverages.htm to refresh me about
beverages.

 

I am installing  a temporary beverage for next weekend. I will use bare
copper wire, because will be light that the one that have a plastic cover
(liner?)

 

But now I am thinking about the antenna and ground. Why I cannot hang
directly to wood supports and I need to put a insulator on the wooden
supports to put the wire?

 

So what about the two ends wooden supports? How can I tension the wire if I
need to isolate the wire from the wooden supports? 

 

73,

Jorge

CX6VM/CW5W

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Re: Topband: beverage construction

[Grant Saviers]

A neat and cheap insulator for along a Beverage is the C shaped screw in 
insulator for electric horse fences.  The ends of the C overlap so a 
half twist allows the wire to be inserted and then held with 90 degree 
rotation.  It is then free to slide in the insulator.  Most any horse/ag 
supply store should have them.


see 
http://www.amazon.com/Fi-Shock-SC-275-Black-Insulator-25-Per/dp/B000IK0ML4/ref=sr_1_2?ie=UTF8qid=1353632067sr=8-2keywords=electric+fence+insulator


Grant KZ1W


On 11/22/2012 4:45 PM, Jorge Diez - CX6VM wrote:

Hello

  


I was Reading http://www.w8ji.com/beverages.htm to refresh me about
beverages.

  


I am installing  a temporary beverage for next weekend. I will use bare
copper wire, because will be light that the one that have a plastic cover
(liner?)

  


But now I am thinking about the antenna and ground. Why I cannot hang
directly to wood supports and I need to put a insulator on the wooden
supports to put the wire?

  


So what about the two ends wooden supports? How can I tension the wire if I
need to isolate the wire from the wooden supports?

  


73,

Jorge

CX6VM/CW5W

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