It can work well. At w0wtn we did circular for VHF and UHF in 2005. There is a picture of the setup here: http://www.w0wtn.org/img_browse.php?i=/images/field_day_2005/KK0SD_Sat_Ant.j pg
I took the phasing info straight from the Satellite Experimenter's Handbook. You might notice the S Band cavity backed Helix as well :-) 73, Joe kk0sd -----Original Message----- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of N0JY Sent: Tuesday, April 16, 2013 5:03 PM To: AMSAT-BB Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or horizontal I did it at field day last year, a couple of Arrow antennas with the 2 meter side set up for RHCP. Seemed to work real well on the analog birds. Some 75 ohm coax does the matching, see a picture at http://www.n0jy.org/images/IMG_20120623_215906.jpg The picture was taken at night, so look closely and you'll see a 1/4 wave 75 ohm section at the tee to both sides, the right side directly to the antenna and the left side to another 1/4 wave 50 ohm section connected to the antenna. Credit goes to SV1BSX I got the idea from his web site http://sv1bsx.50webs.com/antenna-pol/polarization.html Jerry N0JY On 4/16/2013 1:31 PM, Douglas Phelps wrote: > Any reason why, using identical coax lengths, you could not transform the > impedance to 100 ohms and then use a T connector to sum both antenna signals and > achieve 50 ohms to the radio? I know Transmit power will be 3 dB down at either > antenna but is there any reason it will not work? Any antenna gurus out there? > > > > > ________________________________ > From: R.T.Liddy <k...@ameritech.net> > To: amsat-bb@amsat.org > Sent: Tue, April 16, 2013 11:46:35 AM > Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or horizontal > > For the Satellites, it completely doesn't matter. At any given moment, > you only have 1 chance in 90 that you will have matching polarization. > > So, if you plan to use the antenna for other than Satellites, set your > polarization > for that purpose (V for FM or H for SSB/CW). > > My plan is to install 2 Elk antennas, one V and one H. Then, have a relay that > I can switch between the two and choose the best downlink signal at any > given moment. This arrangement will also give me optimum flexibility for > terrestrial operation on 2 & 440. > > Now, where can I find a relay to do that function????? > > 73/GL, Bob K8BL > > > --- On Tue, 4/16/13, Lee Maisel <mai...@lobo.net> wrote: > > > From: Lee Maisel <mai...@lobo.net> > Subject: [amsat-bb] Re: Mount an Arrow on rotator with 2m vertical or horizontal > To: "Don Hoover (WS4E)" <w...@arrl.net> > Cc: amsat-bb@amsat.org > Date: Tuesday, April 16, 2013, 12:24 AM > > > Hi Don, > > I have mine mounted with 2m elements horizontal, because that's how it > seems I used it most when it was handheld. > > Lee > W5LMM > > > Don Hoover (WS4E) wrote: >> Just wondering, should I mount my arrow with the 2m elements oriented >> vertical or horizontal? >> >> I am planning on putting it at 15deg and just using a az rotator. >> >> Does it even matter which way its oriented since the polarity of the sats >> are always changing? >> >> Maybe I should mount it like this: / instead. >> >> Just curious what some thought was the best way to go. >> _______________________________________________ >> 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 _______________________________________________ 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
