<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office"><head><!--[if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><body>
Patrick,<div><br></div><div>Check this link on troubleshooting M2 driven elements. <a href="https://www.m2inc.com/M2DETroubleShoot" target="_blank">https://www.m2inc.com/M2DETroubleShoot</a> <div id="temp-enhancr-placeholder" class="enhancr-placeholder-medium" data-size="medium"></div></div><div><br></div><div>Hope to work you sometime in a contest</div><div><br></div><div>Jeff K9YR EN52<br><br><br><a href="https://overview.mail.yahoo.com/?.src=iOS">Sent from Yahoo Mail for iPad</a><br><br><p class="yahoo-quoted-begin" style="font-size: 15px; color: #715FFA; padding-top: 15px; margin-top: 0">On Sunday, June 28, 2020, 20:36, Patrick Thomas <p-thomas@mindspring.com> wrote:</p><blockquote class="iosymail"><div dir="ltr">Hi all,<br></div><div dir="ltr"><br></div><div dir="ltr">When I put my m2 6m3 up for the June contest, I encountered needle-pinning SWR on the rig SWR meter... further checking showed the resonant frequency had moved up to ~60 MHz. Fiddling with coax and antenna fittings - and even the setscrews on the shorting bars - resulted in no improvement.<br></div><div dir="ltr"><br></div><div dir="ltr">A couple days after the contest I went back out there, unhooked the balun F connectors, cleaned everything out with alcohol, put it back together, went inside, and voila... worked like a champ.<br></div><div dir="ltr"><br></div><div dir="ltr">Fast forward to a few days ago when we had stations from Japan (!?!?) audible on 6m, and sure enough, back to 5+:1 SWR.<br></div><div dir="ltr"><br></div><div dir="ltr">Is anyone aware of something else to check on these antennas? Figured I would ask this group before going back to ask tech support or ripping things apart. I didn't notice any evidence of corrosion around the F connector and everything inside when I was cleaning looked like it had never seen the light of day since being assembled. There is a bit of "patina" on the aluminum parts, but since it was working great with those same elements (like consistently fine with no evidence of intermittent failure for a few days), I'm a bit at a loss. Rotation position also doesn't matter.<br></div><div dir="ltr"><br></div><div dir="ltr">One of the set screws unfortunately did have the allen slot strip out... it is very tiny (1/16" or so?) and is in a hole not a whole lot bigger than that.. not sure if they make screw extractors or helicoils or whatever in such small sizes but again maybe you guys know... or maybe I should just re-tap it for a larger setscrew?<br></div><div dir="ltr"><br></div><div dir="ltr">Also if there's anyone near (or willing to be near) the Novi area who has a directional 23cm or 13cm antenna they're looking to get rid of, please let me know. Actually I would be interested in dish feeds too as it's just a matter of time until I get new mesh into the 8' C-band dish I have in the yard... but thinking more like yagi or corner reflector in this case. Something I can bring up the hill with me for the UHF contest in August which is (sadly) only "a few weeks" away!<br></div><div dir="ltr"><br></div><div dir="ltr">Thanks!<br></div><div dir="ltr"><br></div><div dir="ltr">Pat<br></div><div dir="ltr">KB8DGC<br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">MiVUS mailing list<br></div><div dir="ltr"><a ymailto="mailto:MiVUS@mivus.org" href="mailto:MiVUS@mivus.org">MiVUS@mivus.org</a><br></div><div dir="ltr">subscribe/unsubscribe <a href="http://mail.mivus.org/mailman/listinfo/mivus_mivus.org" target="_blank">http://mail.mivus.org/mailman/listinfo/mivus_mivus.org</a><br></div><blockquote></blockquote></blockquote></div>
</body></html>