Nice complete cookbook type video. An antenna analyzer certainly helps adjust things. Either the MFJ or the Nano VNA can show you the feed Z -- Resistance AND the reactance showing whether it is short (Xc -j) or long (Xl +j). GL......73...Rick
On Fri, Nov 20, 2020 at 2:00 PM KJ Anderson via BVARC <[email protected]> wrote: > Definitely look at a NanoVNA. It’s cheap and does all the things. > > > > *-------------------------------------------------* > > *KJ Anderson* > > 253-380-2636 > > www.linkedin.com/in/scrumnerd > > > > *From:* BVARC <[email protected]> *On Behalf Of *Michael Giannaccio > via BVARC > *Sent:* Friday, November 20, 2020 1:37 PM > *To:* mark janzer via BVARC <[email protected]> > *Cc:* Michael Giannaccio <[email protected]> > *Subject:* Re: [BVARC] Antenna feed point help > > > > Thanks for the info Mark! Good read on the hairpin match. That makes sense > that maybe just a possible shorter hairpin match could be the ticket. I > guess I'll be looking into getting an antenna analyzer. I'll need one > around the shack anyway in the future. > > > > -- > > > > Mike Giannaccio > > KI5LFZ > > > > > > On Friday, November 20, 2020, 12:44:00 PM CST, mark janzer via BVARC < > [email protected]> wrote: > > > > > > Here's a youtube of constructing a tape measure yagi, for reference. > > > > (1) Tape Measure Yagi Beam Antenna - Ham Radio Q&A - YouTube > <https://www.youtube.com/watch?v=BmHoQrDfw-0&feature=emb_logo> > > > > Tape Measure Yagi Beam Antenna - Ham Radio Q&A > > > > > > > > Trying your modification may only require experimental adjustment of the > hairpin match. > > You'll want to use an antenna analyzer to check it. > > > > Here's an article on the hairpin match. > > > > HairpinArticleFix (ehpes.com) > <http://ehpes.com/n6mw/HairpinArticleFix.pdf> > > > > Hopefully someone from AMSAT (Andy? W5ACM or Rick HIller W5RH) can shed > more light on this. > > > > > > 73 > > Mark > > K5MGJ > > > > > > > > > > On Friday, November 20, 2020, 11:09:31 AM CST, Michael Giannaccio via > BVARC <[email protected]> wrote: > > > > > > Good morning, > > > > I'm wanting to build a 2m tape measure yagi and I'm seeing that most of > the designs on the web are feeding it with a length of RG58 coax stripped > at the end and soldered to the driven element. However what I was thinking > of doing is putting an SO239 connector right at the feed point of the > driven element and mounted to a pvc conduit body. Then making a short > jump (3 inches max) with 12 ga solid wire and soldering them to the > element. I really have no experience with this kind of stuff and I'm > wondering if this would work or if it would horribly impact the performance > of the antenna. Sorry if this a dumb question! > > > > I'm appreciative of any help you can offer. > > > > Thanks! > > > > -- > > > > Mike Giannaccio > > KI5LFZ > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > [email protected] > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > -- Rick Hiller *e-mail: [email protected] <[email protected]>* *Cell: 832-474-3713* *Physical: 9031 Troulon Drive* * Houston, TX 77036*
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