Depends upon you need a new grass mower or a good radiating HF array
...........
Jos on4kj
-----Message d'origine-----
De?: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] De la part de
Dinsterdog@aol.com
Envoyé?: samedi 14 mai 2005 16:04
À?: towertalk@contesting.com
Objet?: [TowerTalk] Grading a ground radial system
I'm trying to figure out how well my radial system is performing with
test
down at antenna feed point:
Radials detached:
Resonant point w/ 1.6 SWR, 80 ohms impedance, 40Khz bandwidth at 2:1
SWR
bell curve
With Radials attached:
85Khz drop in resonant point now with 1.4 SWR, 42 ohm impedance, 56
Khz
bandwidth at 2:1 SWR bell curve.
With radials, big drop in resonant point, impedance drops at antenna,
and
slightly wider bandwidth at 2:1 SWR bell curve. So how is my radial
system
doing?
73
Paul N0AH
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with
any questions and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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