[Antennas] Antenna Balls
Ronald KA4INM Youvan
[email protected]
2003年6月24日 04:36:59 +0000
<
"What is the purpose of the little ball at the end of a mobile antenna?
I know of that the ball is there is for static dissipation/control and
improve the antenna efficiency by not ending the antenna in an abrupt point"
>
IMMO it is there for 3 reasons.
1. eliminate the point that can cause:
a. chrona
b. start a lightning streamer
2. eliminate the point that can puncture someone's eye.
3. reduce the physical "Q" of the springy metal, reducing mechanical vibration
from the rapid movement
BTW you could buy aluminum balls with a set screw to replace missing balls in
the past.
--
73 (= Best Regards) de: Ron [email protected]
100% Slack. since July, 1997 (still free!) SENT D&T are UTC
Visit my HAM Web SITE at: http://www.qsl.net/ka4inm