Re: Dual Band (2m-70cm) Mobile Antenna Recommendations
Can anyone recommend an antenna...to improve my [mobile] satellite reception?
By definition, a good antenna for repeaters is bad for satellites. Repeaters are on the horizon, satellites are usually higher when they are strong enough to hear.
Please see the OMNI antenna discussion at the bottom of the ASTARS web page:
http://www.ew.usna.edu/~bruninga/astars.html
Use a 19" 2m whip in the center of your roof. It has almost 5 dB gain above the horizon on 2 meters and over 7 dB on UHF.
Bob, WB4APR
At 12:12 AM 3/5/2008, Bob Bruninga wrote:
Can anyone recommend an antenna...to improve my [mobile] satellite reception?
By definition, a good antenna for repeaters is bad for satellites. Repeaters are on the horizon, satellites are usually higher when they are strong enough to hear.
And don't overlook the feedline. While I was running a high gain tri band whip for the mobile, I used to get good results from AO-51. A clue could be found in the antenna system. The antenna was a 2m/70cm/23cm whip, and for 23cm performance, I spend the money on a factory made mount/feedline, which was designed for 1.2 GHz use. The result is that at 70cm, this antenna outperformed the other 70cm capable antenna (which was fed by about 10' of RG-58) by a noticeable margin, and satellite reception was better than expected for a vertical with gain.
I wonder how this feedline would have performed with a 2m 1/4 wave whip. I suspect the results would have been superb.
73 de VK3JED http://vkradio.com
participants (2)
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Bob Bruninga -
Tony Langdon