Re: [BVARC] DXCC100
Congrats and well done!!! From: K5BOU via BVARC Sent: Wednesday, February 1, 2023 7:21 PM To: 'BRAZOS VALLEY AMATEUR RADIO CLUB' Cc: K5BOU Subject: [BVARC] DXCC100 I’m excited to announce I made my DXCC 100 on 10 M K5BOU-PhilippeBoucaumont Houston|Texas|USA| https://mccrarymeadowsweather.com/ 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/ 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/
Re: [BVARC] January 2023 BVARC Newsletter
The digital version is sufficient (I like the color). Stop the printed version. From: Eddie Runner via BVARC Sent: Monday, January 2, 2023 8:31 PM To: bvarc@bvarc.org Cc: Eddie Runner Subject: [BVARC] January 2023 BVARC Newsletter enjoy 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/ 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/
Re: [BVARC] Seeking Antenna Design Info
Now and then we all have these “DUH” moments. Over 20 years ago I made a loaded 160M vertical with the loading coil at 33’ (the length of 2” aluminum pipe I had available at the time) and a whip on top for another 18’ (total height ~52’). Inductance was chosen to resonant the whole system at the low end of 160m. Works like a champ. Then I discovered that the antenna worked great on 40M as well. The “DUH” moment: 33’ is a quarter wave on 40M. The inductance was sufficient to isolate the lower 33’ section. Serendipity is a wonderful thing! Larry K5LJ From: Rick Hiller via BVARC Sent: Sunday, July 10, 2022 6:17 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB ; TDXS List Cc: Rick Hiller Subject: Re: [BVARC] Seeking Antenna Design Info Short answer to my design dilemma or "how to kill a hot Sunday afternoon" Focus is -- Shortened dual band dipoles that use a coil for loading a lowband wire and using the same coil to "trap" RF into the higher band, inner portion of the wire. [I was wondering how this worked, as JP had sent me a EFHW design using a single coil using this trick] The dual band antenna consists of a higher band antenna wire (i.e. 40 meters) with coils at the ends of this portion of the wire. Short end wires are added on the outside of the coils to get final resonance on the lower band. The coils play the part of low band loading coils and the part of "traps" for the higher band RF.Why? The coils are positioned at the ends of the center, 1/2 wl, higher band wire portion, which is a standing wave high voltage point and the XL of the coil is designed to be quite high to stop any high band RF flowing outside the high band inner wire...making a resonant dipole for 40 mx.When using the antenna as the longer 80 meter wire, the coil has less XL (XL = 2PI F L), and since the coil is within the standing wave sinusoidal curve, it acts as a loading coil. RF will continue to flow out to the very end of the antenna wire thus providing resonance at the lower frequency. The antenna, of course, has the benefit (to some) of being shorter, physically, due to the loading effect of the coils. The coils must have sufficient windings to produce the correct XL for each band and they must be positioned properly within the wire for this dual band system to work. References: --Alpha Delta' DX-CC and EE antennas use this design with their ISO-RES coils. --In Bill Orr''s Antenna Handbook 1979, he gives 2 example antennas -- 20/80 and 40/80, which I modeled and they work out just great -- nice dual band wires. Orr also comments that this dual function coil trick was first referenced in 1926 by the Bureau of Standards, but I could not find any such publication about it. --In Pop Com Feb 1988, W9INN built a 160 and 80 sloper vertical using this trick (thanks to Matt, KM5VI). So...y'all probably knew all this, but I am still learning. Thanks for reading or deleting. I've had fun! Time for dinner. 73...RH On Sun, Jul 10, 2022 at 11:38 AM Rick Hiller wrote: I appreciate everyone's comments and direction. I knew if I pondered the question long enough and with the help of a few antenna craftsmen the answer has come to me. It's nice to have knowledgeable and interested friends. For others, discovery is a light going off or a bell dinging when you get the answer you seek. For me, most of the time, it is either a Homer Simpson "DUH" or a 2 x 4 to the side of the head. It's was no different this time. The answer to be told soon after a few EZNEC runs. Thanks for all of your comments. Regards...Rick W5RH On Sat, Jul 9, 2022 at 8:57 PM Rick Hiller wrote: Loading coils used also as traps are my focus. Alpha Delta uses what they call an Iso-Res Isolation (trap) and Resonator (loading coil) in their antennas. Bill Orr mentions a few antennas in his books that use them, but they are cookbook examples for building and nothing on the design of the dual function coil. Can any one provide me with a book reference or a URL etc. that might provide clues as to the design, building and measurement of such devices? I realize that certain coils have a self-resonance and I can find info on that, but there are no references that apply this self-resonance to an antenna design. Contact me direct, if you wish. rickhille...@gmial.com More detail if you wish to read about it..JP sent me a design of a shortened EFHW for 80 and 40 that uses a 110 uH coil near the end of the antenna wire that provides loading for 80 MX and traps 40 MX energy, thus making the antenna dual band. I modeled it in EZNEC based on the basic design, and lo and behold the antenna when doing an SWR sweep does indeed resonant on 80 and 40. Displaying the currents on the wire show that it is used at full length on 80 and stops at the coil on 40. I think I am missing something in my research.
Re: [BVARC] Non-Ham but Raining Cats and Dog!
We adopted a cat from the SOCA folks a year ago. Great cat and good people. Larry From: Scott Medbury via BVARC Sent: Friday, July 30, 2021 1:18 PM To: 'BRAZOS VALLEY AMATEUR RADIO CLUB' Cc: kd5...@gmail.com Subject: [BVARC] Non-Ham but Raining Cats and Dog! My daughter Kelli – KG5QJE asked me to post this link. She is fostering a dog right now and adopted another. She is trying to help find foster “parents” or potential adoptive parents for dogs of all kinds and sizes as well as cats. All of the animals are spayed and/or neutered. In exchange for your care, they offer companionship and love. https://soca-fbc.org/ 73, Scott KD5FBA Kelli – KG5QJE kg5...@gmail.com 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/ 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/
Re: [BVARC] Yaesu Repair
See HamRepair.com From: Keith Dutson via BVARC Sent: Monday, June 28, 2021 5:23 AM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: Keith Dutson Subject: [BVARC] Yaesu Repair Need some repair to a Yaesu FT-987D, including replacement of a broken clarifier knob. What is the best shop to do the repair? Thanks for your response. 73, Keith NM5G 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/ 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/
Re: [BVARC] Anybody have a suggestion for who may be able to repair my Kenwood TS 570?
See HamRepair.com. From: Bob Hawkins via BVARC Sent: Sunday, June 20, 2021 4:55 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: Bob Hawkins Subject: [BVARC] Anybody have a suggestion for who may be able to repair my Kenwood TS 570? Need a qualified Kenwood technician. Anybody have a suggestion? Bob Hawkins bobhawki...@gmail.com 281-827-9135 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/ 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/
Re: [BVARC] Rag Chew Net Question
Rick, I listened in but we were having a bad TS (lotsa lightning) about that time so I did not check-in. TS was heading for SW Houston. Larry From: Rick Hiller via BVARC Sent: Thursday, April 15, 2021 9:15 AM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: Rick Hiller Subject: [BVARC] Rag Chew Net Question Can anyone comment? Did the Rag Chew Net happen last evening? I was listening on the Waller web SDR, (and a few other regional web SDRs) but heard nothing during the typical net time. In fact, the Waller SDR seemed a bit deaf. Thanks...Rick -- W5RH Virus-free. www.avast.com 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/ 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/
Re: [BVARC] (no subject)
Band plans – i.e. cw/dig/ssb are set by FCC From: Jeff Greer via BVARC Sent: Tuesday, March 30, 2021 3:28 PM To: bvarc@bvarc.org Cc: Jeff Greer ; K5BOU Subject: Re: [BVARC] (no subject) Someone will correct me if I'm wrong, but I believe band allocations/band edges are set by the FCC, but the band plans are all ARRL. From: BVARC on behalf of K5BOU via BVARC Sent: Tuesday, March 30, 2021 2:48 PM To: bvarc@bvarc.org Cc: K5BOU Subject: [BVARC] (no subject) Are this already in place or need the FCC approval? Thanks http://www.arrl.org/files/file/ODV/Second%20Board%20Meeting%20July%202020/Doc%2025A%20Band%20Plan%20Final-1b.pdf Sent from my iPhone 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/ 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/ 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/
Re: [BVARC] Yagi and Uda Original Paper in QEX
Yeah, the W7SX beam was interesting. I did some EZNEC modeling which duplicates his work. Larry K5LJ From: Rick Hiller via BVARC Sent: Tuesday, March 23, 2021 2:13 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB ; TDXS List Cc: Rick Hiller Subject: [BVARC] Yagi and Uda Original Paper in QEX If you are a fan of the Yagi-Uda array, have a read of the original 1926 paper written by them about the newly discovered phenomenon of parasitic performance. ARRL QEX magazine March/April 2021If you are an ARRL member it is available in the digital realm at http://www.arrl.org/arrl-magazines. Other nice articles there too about a Yagi variant and an antenna tuner loss measurement device. Very 73Rick -- W5RH 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/ 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/
Re: [BVARC] Surplus Ham stuff...
MFJ sell individually all the variable capacitors and inductors used in their equipment – check their catalog. From: Gary Sitton via BVARC Sent: Wednesday, February 3, 2021 9:07 AM To: Allen Brier via BVARC Cc: Gary Sitton Subject: [BVARC] Surplus Ham stuff... Allen: I would like to get some high voltage variable tuner caps. and air coils for tuner repair/mods. I have some balanced tuners which I would to beef up to 1.5 KW. Three (3) position Delta coax switches are also nice and assorted ferrites are always needed. I can make a trip to pickup or inspect if needed and will pay for premium stuff. 73, Gary Sitton, K5AMH gasit...@comcast.net SDR/DSP Consultant, "Have FFTs, Will Travel." Brazos Valley Amateur Radio Club BVARC mailing list BVARC@bvarc.org http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org Brazos Valley Amateur Radio Club BVARC mailing list BVARC@bvarc.org http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
