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 ) To verify my point I have just received a QSL card from " Nick" - KB5RVT confirming our contact on AO-7 mode B (SSB). MY QTH is WALES in the UK and "Nick" in So.Burlington, Vermont. I was using my "ELK" antenna (horizontal) and Nick has confirmed that he was using an ARROW YAGI. Thanks for the contact " NICK" - A great pleasure to work you via the old bird still working pleased to say. QSL card on the way with thanks. Ken Eaton GW1FKY Amsat- UK Amsat NA
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: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Saturday, March 19, 2011 2:36 AM To: [email protected] 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 )
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: [email protected] [mailto:[email protected]] On Behalf Of Ted Sent: Thursday, March 24, 2011 2:02 PM To: [email protected]; [email protected] 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: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Saturday, March 19, 2011 2:36 AM To: [email protected] 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 )
_______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
I agree with Dee, but I'll add my opinion. The fixed elevation option is a good approach to reduce your costs.
If you are going to fix the elevation, do *not* use a very high gain antenna with a narrow beam width. You are better off with a moderate gain antenna (for example, the Elk or 4-7 element vertical or 2x7 circularly polarized) so that you have a wider beam width.
73, Steve N9IP
participants (4)
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Dee -
GW1FKY＠aol.com -
Stephen E. Belter -
Ted