The actual fixed elevation on the AZ rotor is determined by the beam width of the yagi antenna used. If at all possible, all the calculations based on the average pass elevation is near 30 degrees. If you believe that you will use lower passes, say if the beam width is 25 degrees, putting it fixed at about 20degrees gives you the split of + - 12.5 degrees. It IS a tradeoff. The higher the gain of the Yagi, the lower the beam width. Good Luck... Dee, NB2F
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Ted Sent: Thursday, March 24, 2011 2:02 PM To: GW1FKY@aol.com; amsat-bb@amsat.org Subject: [amsat-bb] Re: Antenna discussions
Agree !!
Along those lines, before I put up my Kenpro az/el rotor, I plan on testing various locations using my Elk with a fixed el but on a small rat shack rotor for az. I have seen here recommendations for 15 deg and some for 30 deg fixed el. Thus there seems to be 2 schools of thought on this. Is there any compelling argument for one or the other? I'm almost inclined to split the diff at +-22 deg. (most passes for me are N/S and to the E - not so good to W
Any thoughts appreciated
73, Ted, K7TRK
-----Original Message----- From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@amsat.org] On Behalf Of GW1FKY@aol.com Sent: Saturday, March 19, 2011 2:36 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Antenna discussions
Hi all, Regarding the discussions on antennas - I am not into any debate about the pro's and con's, but would just like to encourage anyone to just have a go. Sure the argument will always prevail perhaps under the " Must do Better" comment and I am sure that one can always improve or progress with experimenting - ( AMATEUR RADIO )
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