Colleagues, Good afternoon. Excellent work done by Rick W5RH on contacting the authors and getting info on their antenna.
If you’re interested, this is a quick walk-through I made on antenna modeling using the program called MMANA GAL. It’s similar to the EZNEC program and I believe it contains the same processing engine as EZNEC; however, you may find the GUI simpler. MMANA GAL walk-through on simple antenna optimization: https://youtu.be/svtW9h_nu3k?si=12Swh_cFaiHEB0Tz Simple antenna optimization in MMANA GAL youtu.be Hope that you find it useful. 73, Stephen (W2WF) > On Dec 6, 2023, at 12:10 PM, Rick Hiller via BVARC <bvarc@bvarc.org> wrote: > > Concerning the QST December 5/8th WL Vertical. I had requested from the > author more detailed information on the design aspect of the vertical. > Henry and the actual designer, Pekka, OH3WAV, have responded with a plethora > of design information answering all of my questions and mis-understandingings. > > I have compiled all of this information into 5 PDF files of about 5 Mb total. > > 5 PDF's --The full article, K4ERO Analysis, Chokes for other bands and some > advantages, OH3WAV Design Info and OH3WAV Answers to my questions. > > Some info is probably beyond the current understanding level of a few members > just starting out, but it is an excellent teaching moment for them and for > other more experienced members. So...if you would like the 5 files please > send me a request note DIRECTLY to me. NOT thru the reflector. and I will > send them your way. > > I'd like to hear your comments as you work your way thru the design. Keep > us all posted. > > 73,,,Rick W5RH rickhille...@gmail.com <mailto:rickhille...@gmail.com> > On Thu, Nov 30, 2023 at 3:24 PM Rick Hiller <rickhille...@gmail.com > <mailto:rickhille...@gmail.com>> wrote: >> For those interested in the QST Nov and Dec antenna designs, my note of Nov >> 19th requesting insight has been answered by me finding additional >> information in the latest QEX for the LPi and the QST Extra Info pages for >> the 5/8 wl vertical. For the 5/8th wl the URL is at the end of the >> article. I am still working thru this additional info but it looks like it >> might just be the fog clearing PDF's for these articles. >> >> >> >> GL and 73...Rick W5RH >> >> >> >> From: BVARC <bvarc-boun...@bvarc.org <mailto:bvarc-boun...@bvarc.org>> >> Sent: Friday, November 17, 2023 8:13 PM >> Subject: [BVARC] Antenna Article Understanding Help Needed >> >> >> >> I usually try to understand the antenna articles in QST. Most are straight >> forward and have a reasonable explanation of how the antenna works. The Dec >> 2023 QST has the "OH3JF 5/8 WL Vertical Dipole". He tells you what to do >> to build it (sort of) but doesn't tell you what makes it all work. I have >> looked at it every which way to no avail. The numbers just don't match to a >> 5/8 wl antenna and I do not understand the reason, values and positions for >> the capacitor stub and the "matching stub". Best guess he is shortening a >> longer antenna to 5/8th wl ...no....forget I said that....I just don't know. >> I look at the added info he references and that gave no clue either. >> >> I'll keep digging. (Unfortunately, as a non--native English speaker his >> grammar is not so hot) >> >> >> >> Anybody out there have a different take on this antenna's design and theory? >> I sure would appreciate being set straight. >> >> >> >> Thanks and 73...Rick W5RH >> >> >> -- >> Rick Hiller >> e-mail: rickhille...@gmail.com <mailto:rickhille...@gmail.com> >> Cell/VM/Text: 832-474-3713 >> Physical: 9031 Troulon Drive >> Houston, TX 77036 > > > -- > Rick Hiller > e-mail: rickhille...@gmail.com <mailto:rickhille...@gmail.com> > Cell/VM/Text: 832-474-3713 > Physical: 9031 Troulon Drive > Houston, TX 77036 > ________________________________________________ > Brazos Valley Amateur Radio Club > > BVARC mailing list > BVARC@bvarc.org > http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org > Publicly available archives are available here: > https://www.mail-archive.com/bvarc@bvarc.org/
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