Maybe he was thinking of one of these.......... http://va6bc.no-ip.com/jerry_pix/Quadrifilar-helix/quadrifilar_helix_antenna.htm http://www.dxzone.com/dx23282/quadrifilar-helix-antenna.html 73, Harvey K5HV
----- Original Message ----- From: "Greg D." <ko6th_g...@hotmail.com> To: <kc6...@cox.net>; <amsat-bb@amsat.org> Sent: Tuesday, July 12, 2011 0:51 AM Subject: [amsat-bb] Re: 70cm Helicoil Good/Bad expensive? > > Hi Art, > > I've got a BBQ Grill too, but used a 3 1/4 turn helix for a feed. I was > able to work AO-40 at apogee with it. Definitely a nice system. > > How big is your dish? I've not seen a Grill antenna much bigger than the > one I currently have, and I'm told it's not big enough for 1.2 ghz (only > 30"). Supposed to need at least 4'. So instead I built a helix for that > band and did some L/S and L/U through AO-51. Then I found a commercial > long boom 1.2 ghz yagi at another Ham Swap (gotta keep me away from > those!), and replaced the Helix. But, you know, I don't think the new > antenna improved things. Mechanically, yes, but not RF. The Beacon off > to the West is about the same on either one. > > Given the lack of S-band on the current birds, I was thinking about taking > down the Grill for a while, just to lighten the load on the rotor motors. > Maybe put up a Wi-Fi flat panel, just to keep the band open. But if I can > get both 1.2 and 2.4 out of the Grill instead, might that be better? > > Greg KO6TH > > >> From: kc6...@cox.net >> To: ko6th_g...@hotmail.com; amsat-bb@amsat.org >> Subject: RE: [amsat-bb] Re: 70cm Helicoil Good/Bad expensive? >> Date: Mon, 11 Jul 2011 21:26:17 -0700 >> >> Greg, >> Do not overlook the 2.4 GHz grid dishes. I have successfully added a quad >> loop for 23 cm (1.2GHz) and have been pleasantly surprised with the >> performance. I have used one for transmit on 2.4 and receive on 1.2 for >> ATV >> work. A single dish with two microwave bands. >> >> Art, >> KC6UQH >> > > > _______________________________________________ > Sent via AMSAT-BB@amsat.org. 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 _______________________________________________ Sent via AMSAT-BB@amsat.org. 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
