Nice article. I guess coax running inside the boom centered their effect on the pattern. Did you use ferrite beads for isolating common mode? I have two 7LFA WOS yagis from G0KSC/InnovAntennas that use a ferrite bead balun. Since my antennas are Hpol coax is run along the boom and vertical masts. Not yet QRV awaiting use of man-lift to exchange azimuth rotator and add digital encoder and thrust bearing. Nice drift curve of Sagittarius-A; was impressed that it was detectable with this array! I wonder how many 432-eme stations are using adaptive pol reception. My 2m-eme station is set up for adaptive reception. 73, Ed - KL7UW At 01:00 PM 3/29/2020, Joe Taylor via Moon-net wrote: 73, Ed - KL7UW http://www.kl7uw.com Dubus-NA Business mail: dubususa(a)gmail.com

Hi Ed, Yes, we used ferrite beads on the short lengths of RG-142 where they exit the rear of the hollow boom, just before their connections to a 3/2-wavelength power splitter. To be honest, I could measure no difference in performance after they were installed. Ideally they should be closer to the driven elements, inside the booms, but there is not enough room there. As you can see from the S/N of the measurement in Figure 9 of the article, Sagittarius A is an easy radio astronomical target at 432 MHz, especially if you can use a large receiver bandwidth. This source is easily detectable with a single Yagi. Unfortunately, few 432 MHz EME stations use adaptive polarization receivers. In large part this is because of the same issues that motivated Marc's original question. Xpol antennas on this band must be carefully designed and constructed, and tolerances are tight. -- 73, Joe, K1JT On 3/29/2020 19:11, Edward R Cole wrote:

Dear Marc - Here is how I did it for my 8X PA144-XPOL-28 array. A second H frame supports the back of the antennas and lets the coax run "backwards" from the feed points. All supports except the main boom are fiberglass. It is extremely rugged... four hard winders with no damage. No RF either, but that is another story. 73, W9IP -----Original Message----- From: Moon-net <moon-net-bounces(a)mailman.pe1itr.com> On Behalf Of Marc Lalonde via Moon-net Sent: Sunday, March 29, 2020 3:44 PM To: moon-net(a)mailman.pe1itr.com Subject: [Moon-Net] 432 X-POL coax routing pic close up ... Hi i try to find some picture of coax routing on X-pol 432 antenna trying to find the best solution , on X-POL not easy since segond loop is on the way Best 73! Marc L. VE2PN _______________________________________________ Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html

Mark you did not respond to my private email? That will not work, you will have poor orthogonality, pattern distortion and probably a poor return loss. 73 Conrad PA5Y ________________________________ From: Moon-net <moon-net-bounces(a)mailman.pe1itr.com> on behalf of Marc Lalonde via Moon-net <moon-net(a)mailman.pe1itr.com> Sent: 30 March 2020 00:50 To: moon-net(a)mailman.pe1itr.com <moon-net(a)mailman.pe1itr.com> Subject: Re: [Moon-Net] 432 X-POL coax routing pic close up ... Hi Mike i look precisely close to driven element ,whit 1/2 coax seem problematic to find a exit way hope atachememt will work ... Marc L. VE2PN On 3/29/2020 6:18 PM, Mike W9IP via Moon-net wrote: Dear Marc - Here is how I did it for my 8X PA144-XPOL-28 array. A second H frame supports the back of the antennas and lets the coax run "backwards" from the feed points. All supports except the main boom are fiberglass. It is extremely rugged... four hard winders with no damage. No RF either, but that is another story.

Hi yas think will use 1 foot of RG-142 inside boom , then switch to ecoflex-15 at the rear if my memory is good boom will act like kind of ballun like it do in FM repeater loop thank for your help Marc VE2PN On 3/30/2020 5:43 AM, Conrad PA5Y via Moon-net wrote: