Topband: First attempt at beverage antenna, not working as expected
kajotus at gmail.com
Sun Jan 16 11:35:41 PST 2011
>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
I would be separating the problems here
First one is half wave BV system should have not too sharp azimuth
And the elevation angle should be pretty high
Second problem can be If your BV system was having bad ground - your
antenna looks like piece of wire above the ground.
This wire should have more or less same reception on a both ends front and
. In this (bad) case you will loss
expected gain on your main direction (45 deg)
If that is exactly your situation - I would recommend to work in getting as
best performance as possible from your poor BV :
- to arrange good grounding system on a both BV ends by using long
(4 ft or longer) grounding rods or/and grounding radials .
- to play with termination resistor value in order to adjust
Front to Back ratio
. ( and actuaaly get the best reception from EU
This process will require a bit more time spent running around your BV ,
.just according my own experience two waves
Beverage built somehow and not adjusted will beat perfect mounted ½ wave
This is one of the few cases , when longer definitely means better .:-))
Apologies for my cubical English .
Good luck !
Alex Goldenberg VE7IRU
Mailto: alex(at)minstech(dot)com <BLOCKED::mailto:alex at minstech.com>
WEB: www.minstech.com <BLOCKED::http://www.minstech.com/>
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