John Portune, W6NBC, approaches the “home brewing” aspects of direction finding equipment in an article on pages 4445. Also, his five diagrams and photos cover the ways in which you can enhance your effectiveness with some personal modifications. LOW PROFILE VERTICAL KEEPS NEIGHBORS HAPPY IN SUN CITY CENTER, FL. the design above is a center-fed vertical dipole. one advantage is simplicity of construction; however there are several practical disadvantages; namely that the feedpoint is halfway up the antenna, and that the feedline must "exit" the antenna proper at a 90degree angle for some distance (at least 1 meter would be a good idea).
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By John Portune W6NBC . Compromise disguise antennas are no strangers to hams, especially on HF. But which ones are worth the effort? We often just put them up and hope for the best. But when I moved to a CC&R restrictive mobile home park recently, I wanted better answers, particularly for the classic rain-gutter loop, Figure 1. I Presenters will include Ward Silver, N0AX, on grounding and bonding; Glenn Johnson, W0GJ, on DXpeditions, and John Portune, W6NBC, on building slot antennas for antenna-restricted locations. Demonstrations of new amateur radio gear will be presented, and attendees can speak with exhibitors via video/audio or chat, as well as interact with ... - KE4PT 33-35 ANTENNA: A Single Element Vertical "Beam" David Robbins, K7BKI 42-44 ANTENNA: Two Small Helical Antennas for 2 Meters - John Portne W6NBC 45-49 HANDS-ON: Experiment #101 Rotary Encoders, H. Ward Silver, N0AX 60-61 HINTS: Audio Interfacing and Ground loop Solutions, Martin, K0BXB 62-62 HINTS: Nine Dollar Microphone Boom, Steve ... 73 Magazine (also known as 73 Amateur Radio Today) (OCLC 22239204) was a United States-based amateur radio magazine that was published from 1960 to 2003. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, Wayne... Vertical antennas come in all shapes, sizes, lengths, and whether or not ground radials are used. My success with using EZNEC to accurately tell what the gain will be has always eluded me. Until now. EZNEC The use of W7EL's EZNEC comes with two calculating engines, NEC2 and NEC2D. I have always used the NEC-2D engine. by John Portune W6NBC | Jul 18, 2020. 4.2 out of 5 stars 13. ... Shark Antennas S-FM20 Mono Band HF 20 Meter Mini Mobile Vertical Antenna with 3/8x24 Threads, Handles ... I found using a vertical full wavelength delta loop is a 12 dB DX improvement over my rather NVIS dipole. The DX improvement is a big advantage of a loop; low takeoff angle for DX and the full loop can be easily matched. The key word is “vertical” as horizontal loops simply do not work very well 10 feet above ground level. With a few hours of your time and some parts costing between $20 and $40, you can have a high performance vertical dipole which can be fed by 50-ohm. Thanks to Dave Tadlock (KG0ZZ) for this simple 2m/70cm vertical dipole antenna project. This antenna is perfect for deed - restricted housing and field operations. Above is a view of the steel mast with the Inverted V G5RV rigged from the top of the 11m mast using a halyard though a purchase on a small gibbet to offset the antenna and feed line from the mast. There are lateral guys at 7m height, and the left hand one is non-conductive synthetic fibre rope. Atop the mast is a 2m/70cm vertical. Activity will be limited to his spare time (usually on "almost every evening", between 2100-0000z) on 160-10 meters using mostly FT8 (F/H) and SSB, with a Yaesu FT-891 and 100 watts into a vertical antenna. On FT8 (Fox-Hound Mode) the suggested frequencies are: 3590, 7056, 10131, 14090, 18095, 21091, 24926 and 28091 kHz. A while ago I ran across W6NBC's 40m vertical, in simple terms is a 1/2 wave element with loading to shorten it to around 40ft, but results in similar performance to a 1/4 wave vertical with radials. See http://www.w6nbc.com/articles/2014-QST40mvertical.pdf It is an extremely short vertical radiator with a large capacitor ... How does this W6NBC “derivative of the classical slot antenna” work? Related. 12. The fourth bar is the "vertical" offset between the axis of rotation of the motor and of the load. I.e., if the motor is moved up or down along the gray vertical line in the image. A crank-and-rocker mechanism has several parameters that must be chosen to obtain the desired angular swing range: The designer John Portune (W6NBC) introduces it as "a derivative of the classical slot antenna" but then notes: In contrast to a conventional slot antenna, the slot and antenna surfaces are not in the same plane. The slot, formed by the aluminum shorting bars connecting the two antenna surfaces, is orthogonal to the two planes. May 12, 2020 · However, the vertical side showed -20 dbi gain like the DDRR original design suggested. Besides this mobile would be difficult to tune with all the moving parts...makes the idea impracticable IMO. Homer, if this idea had any real merit, I think somebody might have tried making one. We challenged antenna designer, QST author, and inhabitant of a neighborhood where towers and Yagis would not go down well, John Portune, W6NBC, to come up with a compact vertical dipole with its feedline hidden inside the lower tubing sections and which would be ATU "friendly" delivering good VSWR matches on all bands 80m through 10m with popular autotuners, in particular the new breed of outdoor rated units. High Performance 40 Meters Vertical . Without Radials . This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials . By John Portune W6NBC . I wanted high efficiency 40 Meter antenna with low-angle radiation. Full 1/4 wave vertical for 40m, ON7AMI I left place in the box so that I can mount in the future a coil for use of the antenna on 80m ?160m? High Performance 40 Meters Vertical, W6NBC This shortened easy-to-build vertical, with no-radials, is made from surplus military: Indoor antennas for 40mt, EA5XQ National Semiconductor Linear Applications Handbook 1994 National Semiconductor Corporation 1994 Acrobat 7 Pdf 58.1 Mb. Scanned by artmisa using Canon DR2580C + flatbed option favorite favorite favorite favorite favorite ( 3 reviews ) Topics: Electronics, Semiconductor, Integrated Circuit, Data Book, Application Notes - KE4PT 33-35 ANTENNA: A Single Element Vertical "Beam" David Robbins, K7BKI 42-44 ANTENNA: Two Small Helical Antennas for 2 Meters - John Portne W6NBC 45-49 HANDS-ON: Experiment #101 Rotary Encoders, H. Ward Silver, N0AX 60-61 HINTS: Audio Interfacing and Ground loop Solutions, Martin, K0BXB 62-62 HINTS: Nine Dollar Microphone Boom, Steve ... Buckmaster OCF Dipole Antenna - HamCall.net. Discover The Best Deals hamcall.net Our 7-Band antennas cover 80, 40, 20, 17, 12, 10, and 6 meters, with no tuner required! ! Wire antennas are a great simple way to work 40M and 80M rather than a noisy vertical antenna that requires horizontal radi Homebrew Hf Antennas High Performance 40 Meters Vertical Without Radials This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials By John Portune W6NBC I wanted high efficiency 40 Meter antenna with low-angle radiation. High Performance 40 Meters Vertical Without Radials. Keyword-suggest-tool.com ground plane antenna with radials . By John Portune W6NBC . I wanted high efficiency 40 Meter antenna with low-angle radiation. My inverted-V at 40 ft. performs well, but is “a cloud burner,” good for local contacts within 500 miles. Stand out with “Superior Performance from a Unique HF Vertical,” by John Portune, W6NBC, just in time for #ARRL Field Day. This simple, no-radial #antenna can outperform a conventional vertical, even in antenna-restricted areas. Learn more in the July 2019 issue of #QST, available digitally now and coming to your mailbox soon. 05/30/2019 Stand out with “Superior Performance from a Unique HF Vertical,” by John Portune, W6NBC, just in time for #ARRL Field Day. This simple, no-radial #antenna can outperform a conventional vertical, even in antenna-restricted areas. Learn more in the July 2019 issue of #QST, available digitally now and coming to your mailbox soon. 05/30/2019 Similarly, John Portune, W6NBC, used steel tape for the elements in a pair of 2 meter and 70 centimeter Yagi anten-nas.3 Ron Harger, WD8BCS, described multiple retractable tape measures used as ground radials for a temporary vertical antenna installation. 4 And an entire vertical antenna system was described by David If anyone finds another method, pass it alone: [email protected] or thru w6nbc.com email. John W6NBC: Dec 29th 2018, 21:29: N4CLA Joined: Apr 4th 1998, 00:00 Total Topics: 0 Total Posts: 0 : Any chance of getting a center line drawing of all the vertical and horizontal copper pipes. W6NBC Wins December QST Cover Plaque Award December 17, 2019 No comments The winning article for the December 2019 QST Cover Plaque award is “Slot Cube Antenna for 6 Meters” by John Portune, W6NBC. By John Portune W6NBC . Compromise disguise antennas are no strangers to hams, especially on HF. But which ones are worth the effort? We often just put them up and hope for the best. But when I moved to a CC&R restrictive mobile home park recently, I wanted better answers, particularly for the classic rain-gutter loop, Figure 1. I Jan 10, 2020 · The latest IARU-R1 Monitoring System newsletter reports LED lamp interference forced Wolf DK2OM to relinquish the role of IARUMS Region 1 Coordinator The newsletter says his daily monitoring work has, since April 2016, been intentional hampered by interference from a neighbouring LED lamp. It seems the Federal Network Agency, BNetzA Eschborn, refused to take action against the […] Jan 06, 2020 · Current ham radio news Russian Robinsons team members plan their next expedition. This time they’ll QRV from Palestine as E44RU with strong focus on low bands during January 6-14, 2020. Official Twitter account of the @ARRL Southern Texas Section. Account is not monitored 24/7, for emergencies call 911. Managed by @W5LHC @jackfpaylor Dec 29, 2019 · Current ham radio news W8S Team will be active from Swains Island, IOTA OC – 200, 10 – 25 March 2020. via Current ham radio news December 28, 2019 at 07:13AM via RSS Feed Current… Cushcraft AR6 Ringo 6m product reviews by real people like you. Only at eHam.net. - eHam.net is a Web site dedicated to ham radio (amateur radio). Solid materials, and operationally spot on. 6 meters... With a few hours of your time and some parts costing between $20 and $40, you can have a high performance vertical dipole which can be fed by 50-ohm. Thanks to Dave Tadlock (KG0ZZ) for this simple 2m/70cm vertical dipole antenna project. This antenna is perfect for deed - restricted housing and field operations. vba winhttp.winhttprequest.5.1 set timeout, One of the entry has param "IsBlocked" and the value can be either no or yes, which I can change at will. If I set it to yes, people will be kicked out of the application as soon as they perform selected operations like scrolling data or changing certain fields. OZ7ADZ 234 05 2012 En VDA ( Vertical Dipole Array) til 10 meter..... OZ7BQ 169 04 2012 Hvorfor forstyrrer switchmode strømforsyninger 3. del.... OZ1CCM 173 04 2012 Eksperimentel konstatering af jordsystemersydeevne del 5. This circuit seems simple, looks good enough to dummy loads, but problems may arise when the antenna ports are replaced with real atennas, which have non-50 ohm random impedance o Sep 18, 2015 - Can you spot the 2 meter antenna? Did you know you can cut a thin set of lines in a common "dish" antenna and use it with transceivers? Great DIY slot antenna for covenant restricted homeowners needing a stealth antenna. (No you can't use the dish for both. Read the pinned PDF.) 1.8-2.0 db gain. If you're just starting out, I strongly suggest that you read the first nine articles in this section on the Antenna page, especially those by Jacques Audet VE2AZX, John Portune W6NBC and by William F. Lieske. Yes, there is some repeated material between the articles, but if you're new to duplexers, it won't hurt. Cushcraft AR6 Ringo 6m product reviews by real people like you. Only at eHam.net. - eHam.net is a Web site dedicated to ham radio (amateur radio). Solid materials, and operationally spot on. 6 meters... Nov 24, 2020 · The vertical element is a 17-ft. telescoping whip, and the horizontal element is about 10% longer than the vertical element. I have inductors wound for 40 meters and will try them later today. Once the antenna is working on both 20 meters and 40 meters, I will tap the inductors and get the antenna to work on 30 meters. Jual Antena 2Meter Band 144 Mhz di Surabaya. Kami menjual Antena Vertikal dengan pilihan kapasitas daya sesuai dengan proses pembuatan antena telex/v2r VHF 2 meter band modif homebrow agar di dapatkan hasil sesuai harapan lebih kokoh, rapi 2 Meter Antenna for Bicycle Mobile Operation by WB8ERJ Perhaps the biggest problem with taking An Easy Dual-Band VHF/UHF Antenna by KD6GLF Why settle for ... High Performance 40 Meters Vertical Without Radials This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. It has gain and wave angle comparable to a full-sized ¼λ ground plane antenna with radials By John Portune W6NBC I wanted high efficiency 40 Meter antenna with low-angle radiation. Ebay returns
High Performance 40 Meters Vertical Without Radials. Keyword-suggest-tool.com ground plane antenna with radials . By John Portune W6NBC . I wanted high efficiency 40 Meter antenna with low-angle radiation.
With a few hours of your time and some parts costing between $20 and $40, you can have a high performance vertical dipole which can be fed by 50-ohm. Thanks to Dave Tadlock (KG0ZZ) for this simple 2m/70cm vertical dipole antenna project. This antenna is perfect for deed - restricted housing and field operations.
John Portune, W6NBC, approaches the “home brewing” aspects of direction finding equipment in an article on pages 4445. Also, his five diagrams and photos cover the ways in which you can enhance your effectiveness with some personal modifications. LOW PROFILE VERTICAL KEEPS NEIGHBORS HAPPY IN SUN CITY CENTER, FL.
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