Check out these fine designs and create your own satellite antenna. The Defpom Forum, for RadioMods, S&M Software and Music by The Defpom. In my case, I use the built-in tuner on the Yaesu FT-1000MP. Construction You’ll need hangers that are 16 inches wide; the 18-inch kind because they ca not be tuned to 2 meters. This link is listed in our web site directory since Wednesday Dec 19 2018, and till today "Dish antenna for 2 meters band" has been My Loop Antenna November 20, 2013 9 Characteristics of Small Loop Antennas for HF Operation • Coupling loop ≈1/5 diameter of main loop for good impedance matching on all bands • Antenna is narrowband, operating at resonance of loop L and tuning C • Radiation resistance in series with loss res. Figure 1—The completed weather vane antenna.
The all new Force 12 Flagpole Antenna line, designed by QST author John Portune, W6NBC, are selling extremely well and helping a lot of hams with HOA deed restrictions or who just want a 'low visual footprint' get on the air. W6nbc has the lowest Google pagerank and bad results in terms of Yandex topical citation index. 2 meter 3 element . please use the shoutbox for messages to net control and for follow-up information on topics under discussion. I soldered the coax "stinger" center to the antenna, it was screwed down before with the screw As for my "rubber duck" antenna, its the weirdist thing, I had it set up down low, mounted on my deck, and it seemed to work better then it does way up on the tip of my chimney, so now I'm all messed up.
One aspect is knowing how to build antennas from items you have laying around in your garage, office, or if you are desperate, dumpster diving. 3 by 7 people. The QST Cover Plaque Award — given to the author or authors of the most popular article in each issue — is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. Work all the bands, 80-6M with real DX Confidence from your Home or HOA. After trying a number of different windings I think the current version may be optimum for WWVB at 60 kHz.
Please sign up today 73, Eric 4Z1UG A very clever antenna. Krusty Olde Kurt doesn’t understand where Mosley is coming from, but they are absolutely wrong when they tell you to use the beam without a balun. The edges of the antenna are dipped in a plastic compound meant to provide a covering for hand tools. John, W6NBC, gave the QSO Today community members a free PDF download of the plans to build his center-fed flagpole disguise antenna pictured to the left. It was never meant to be an antenna mount, but over the years several manufacturers have used it, in an apparent attempt to avoid paying royalties to Motorola.
Do you need a license for VHF radios? VHF would work a lot better for me for both the antenna and the properties of that frequency range. The Force 12 flagpole is an effective antenna and is a solution for many people who live in restricted areas, while allowing us to be patriotic. Following a solicitation for entries earlier this year. W6nbc. I ran across an article on the internet for a coaxial antenna by John E.
This includes base, handheld, mobile and repeater usage. Matching Techniques for Dipole/Monopole Feeds. Visit. Of course, I’m not sure how much relationship to reality there will be in the outputs. The black box everybody uses but nobody understands Keys to understanding it This is not a cookbook Let's Make a Cavity.
It works well for an area with antenna restrictions but is what I would call a compromised antenna. Over the time it has been ranked as high as 2 279 699 in the world. Nuts & Volts is written for the hands-on hobbyist, design engineer, technician, and experimenter. Ham Radio Equipment Hams Radios Storage Solutions Ariel For handheld antennas, twist/rotate the antenna to peak the received signal as you point antenna toward the satellite Rotating the antenna 90 degrees when you transmit may help for Fox-1 satellites due to the satellite’s antenna orientation. com, plus a little bit from this PDF (scroll way down) gave me a better understanding.
The tube is insulated from the quad by two small plastic insulators. John Portune, W6NBC, may have more hams to his credit due to his teaching methods and one day amateur radio licensing courses than any of his peers. I recently got a new vehicle and am installing my issued CAP mobile in it. Here is how I did it. But which ones are worth the effort? 09/13/2017.
The slot antenna is vertically polarized as it stands and I'd like to try ssb on the band. . The main category is Antennas for VHF UHF bands that is about antennas for vhf and uhf radio bands. How to Use Your Antenna Tuner by Scott – N4ZOU. Power is available by the flag pole and pole great for raising your wire antenna Please stay with your rig, no one else is responsible for your rig No T-Hunt, per KA6BFB FCC Ham License Testing by W6NBC or KJ6OIL All Classes, inquire at ticket booth or John W6NBC Below is the finished antenna with an offset attenuator mounted on the end of the boom.
. By John Portune W6NBCCompromise disguise antennas are no strangers to hams, especially on HF. Clubs and Conventions need variety and we have found uncommon antenna designs that work well for the average ham to be worthy of discussion by many of our peers. com Homebrew Coaxial Dipole for VHF or UHF Here’s a base station antenna you can easily build for 146, 220 or 440 MHz. Antenna projects for 144 MHz is a curation of 193 resources about , 2m Big Wheel Antenna, OCF 2 Meter Sleeve Dipole Antenna, Feed line Dipole for 2 Meters, Simple VHF Antenna, Extended Slim Jim Antenna.
2 Meter Break-a-way J-Pole Antenna - Well worth the price! Bought one for my VHF go box. This wiki was started to document Frequently Asked Questions across various forums (amsat-bb mailing list, AMSAT-NA Facebook group, #amsat on Twitter, QRZ satellite forum). I was on the 3rd floor and I noticed that there was an un-grounded metal rain gutter that ran all the way around the top of the building. This is more work but the best. Impedance matching techniques.
5 to 50 MHz. The Western Reserve Amateur Radio Club is a Special Service club that exists to go above and beyond for our community and for Amateur Radio, is what defines a Special Service Club (SSC). The QST Cover Plaque Award — given to the author or authors of the most popular article in each issue — is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. com in a single category. My MFB-269 antenna analyzer: Had such a thing existed 20 years ago (thou if it had I was too poor to afford one) it would have saved me SO MUCH time and energy.
The diversity of subjects appeals to all levels of experience and spans such topics as amateur robotics, circuit design, lasers, computer control, home automation, data acquisition, new technology, DIY projects, electronic theory, analog, and myriad microcontrollers. Chapter Outline (click on a title to go to that chapter): The Mysterious Duplexer. The QST Cover Plaque Award -- given to the author or authors of the most popular article in each issue -- is determined by a vote of ARRL members on the QST Cover… Dual Band Tape Measure Yagi Antenna July 19, 2015 Amateur Satellite , Antennas , Ham Radio Amateur Radio , antenna , ham radio , satellite , Saudisat 1C , SO-50 , yagi Michael While I wait for my Arrow antenna to arrive, I thought I would experiment and build a dual band tape measure yagi since I already had most of the parts on hand. John can be reached at W6NBC. This is highly recommended since the thin metal edges are sharp.
A bonus is that a dou ble boom design lets you fold the antenna up conveniently for transpon or storage. These are the instructions and reasoning that I was following, I have to say I thought the purpose of the ladder line was to be a balanced part of the feedline, and thus not radiate, but to be frank, when I asked the best way to build and check a balanced line antenna matching unit from 5 different people, I got five different answers These are the instructions and reasoning that I was following, I have to say I thought the purpose of the ladder line was to be a balanced part of the feedline, and thus not radiate, but to be frank, when I asked the best way to build and check a balanced line antenna matching unit from 5 different people, I got five different answers 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. The matching section of my antenna is about 21m above ground. Ham Radio Equipment Hams Radios Storage Solutions Ariel Transformers Software Survival Projects Same dipole antenna with coax traps would have about 0,6 dB total loss - the double, but a negligible difference on the S-meter of your DX correspondent! The exact resonance frequency of the trap is important to define by construction. Later I began making duplexers from spun-aluminum commercial cake pans.
A 40 Meter Vertical Antenna for Small Spaces by W6NBC I wanted a high efficiency 40 meter antenna with a low-angle radiation pattern for working DX. • Thanks for coming, it was fun and educational building these antennas. 01/09/2019. Both require no welding. Heres a link to it in a PDF format W6NBC 2m/70cm Beam.
If the antenna is mounted on the metallic surface (a car roof or a plate of iron or steel) Get Content Here If the antenna is a beam, it can skew the pattern and will reduce the front-to-back ratio. W6NBC 10 How to Silverplate RF Tank Circuits - A simple and inexpensive process to reduce losses . John E. After prepping the parts, installing the antenna, and installing the radials, we finally get to performance of the 40-10 meter vertical from ZeroFive Antennas. Cast a ballot for your favorite article in the February issue today.
First I rigged up a random length of wire I had on hand as a "skeleton slot The resource is currently listed in dxzone. g. They are no longer exotic. Note:- Loops A -E have sides approximately (~) 1/3 wavelength but overall circumference delta loop is the same QSO Today Episode 9, John Portune, W6NBC - Slot Antenna Efficient 2 Meter Disguise Antenna from Satellite TV Dish, By John Portune, W6NBC Vancouver, Washington Movie: Contact, with Jodie Foster SETI Screensaver Tesla Home Battery Pack Washington State Solar Energy Credits DVDongle DVAP - DV Access Point Dongle Harley Davidson motorcycles Power is available by the flag pole and pole great for raising your wire antenna Please stay with your rig, no one else is responsible for your rig No T-Hunt, per KA6BFB FCC Ham License Testing by W6NBC or KJ6OIL All Classes, inquire at ticket booth or John W6NBC * Experiences of rain gutter antenna with SG230 antenna coupler (commercial link) * K5IJB rain gutter antenna * N3VEM rain gutter antenna * WB3GCK downspout antenna * WMOG's results with rain gutter antennas * W6NBC on rain gutter wire loop antennas (not loading up the gutter as such) Have you used a gutter antenna? Or even worked someone with one? The Arrow antenna can be broken down and carried in a bag, and it will be my primary antenna to work satellites, but the 70cm part of this antenna came out perfectly resonant at 436. W6NBC (see his This area is for use by TWiT staff only.
"Congratulations, John! The design ive decided to go with is one that can be found on the AMSAT website. The remote expedition runs from Oct 20th – Nov 3 201 This was an Awsome antenna with great forgiveness. 105U-1,2,3,4 Wireless Multi-I/O. The offset attenuator is available in kit form from Marvin Johnston KE6HTS Whereas a Dipole is a half-wavelength long radiator, fed in the Center of two equal length legs, the Off-Center-Fed Dipole (which I prefer to call a WINDOM) is a Dipole whose feedpoint is at a point removed from the center of the antenna. I now have an SUV (Jeep Patriot) so my previous setup isn't an option.
Cast a ballot for your […] Elk Antennas 2M/440L5 5-element log periodic product reviews by real people like you. Efficient 2 meter Disguise Antenna Made From a TV Satellite Dish Discussion in ' Ham Radio, SDR & Police Scanner Technology ' started by alnielsen , Mar 27, 2016 . Folded dipoles l s The folded dipole is a very popular antenna for reception of TV broadcast signals. Our next meeting, August 28th, we will be discussing Emergency Preparedness. 6dB colinear VHF antenna Building details of a VHF colinear antenna with 6 db gain 5/8 Collinear antenna A 5/8 wave.
He also found a pdf with the technical specs including dimensions . ; power divides between R rad and R loss W6NBC’ s 2M/70CM Tape Measure Beam Project - . How could that crazy design result in a vertically polarized signal? So I started researching. you are not going to find a radio that cheap in the VHF commercial band. This PDF from W6NBC and this page on antenna-theory.
, (2) Shorten or lengthen tubes. The QST Cover Plaque Award -- given to the author or authors of the most popular article in each issue -- is determined by a vote of ARRL members on the QST Cover Plaque Poll web page. Still, especially for efficient modes like WSPR, a gutter antenna should get you some results. pdf: So I am looking to purchase a permanent CB antenna and trying to figure the best options for mounting location, given the rooftop tent. I made a drawing for this antenna, and i believe that is a reliable guidance to any fellow ham decides to construct this antenna.
ARRL - The winning article for the January 2019 QST Cover Plaque award is “The 2-Meter Slot-Cube Antenna” by John Portune, W6NBC. criminate than a dipole or J-pole. So always use a balun on any bal-anced antenna. Homebrew Coaxial Dipole For VHF Or UHF - W6nbc. He recently moved to an apartment building, losing the large back yard antenna at his previous residence.
Or at least enough to work with. How to tune it? Move the aluminium tube left or right. Specifically how it applies to Ham Radio. I soldered the coax "stinger" center to the antenna, it was screwed down before with the screw I have the IC-7300, SDRplay RSP1A , Mini Winkey USB, and an antenna designed by W6NBC that I built from a Harbor Freight flagpole. The winning article for the January 2019 QST Cover Plaque award is “The 2-Meter Slot-Cube Antenna” by John Portune, W6NBC.
Home-brew 2M aluminum cavity Example for the entire book The best way to learn Cavities • You can make a slot antenna out of any flat surface that is l ht “fit”th ltAl ki h tflarge enough to “fit” the slot. Clear pvc flexible tubing air plants hydroponics plastic hose water pipe picture of eyelet lace hangers plastic clothes hangers picture of eyelet lace hangers plastic clothes hangers Covered Coat Hangers The Crafty MummyTrouser Hangers With Clips Black Plastic CoatPlastic Tubing Zeppy IoRubber Coating Plastic Dress Hangers High End Las CoatGreen Plastic Hangers CoatPlastic Tubing Zeppy […] I wanted to see if it was possible to build a 20 foot tall ham radio tower/mast to give my 2 meter J pole antenna more elevation. We've proudly dug into the research to find very low losses across the antenna system and a greater than >90% efficiency across 10-Bands, again from 3. When I got married 33 years ago (has it really been that long ), I lived in an Apartment of course. How popular is W6nbc? Get traffic statistics, rank by category and country, engagement metrics and demographics for W6nbc at Alexa.
2 meters quad Antenna by IZ3AYQ The antenna can be tuned for 145 or 144 MHz, and used in vertical polarization (as in this picture) or in orizontal polarization. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. An Ultra-Simple 2-Meter Antenna You’ll get J-pole performance from this base station vertical antenna built with coat hangers and PVC pipe. *Please be aware that some combinations of search criteria may result in a longer wait. The antenna is capable to give 2,9 db gain over a dipole when is located more than 15m high, and in this case the radiation angle is 13 degrees.
As an omni-directional antenna, it receives equally well over most the sky. You can make a nifty 2 meter antenna out of those, especially useful if you live somewhere that doesn't allow a normal antenna. There is no solder tag, so prior to fitting the antenna to the case, its best to solder the remaining yellow with onto the antenna base next to the screw hole. It is a balanced antenna, so it requires a balun when fed by an unbalanced input (such as coax). com Inc.
And now I’ve discovered that simple-to-use antenna modeling software is actually available free. We invite you to read, add to, and amend our show notes at wiki. 4BTV "Flag Pole" Antenna Solution to a subdivision antenna restriction by KX9DK The Hustler 4BTV trap vertical antenna is and has been a very popular multiband antenna with ham radio operators for years. For discussion of all amateur band designed antennas and related accoutrements. A vertical antenna seemed the obvious solution because verticals are low-angle radiators.
A No Radials antenna system that offers lower angles for DX, High Power is standard, as is High Performance. I had to really go outside the box on the 70cm director lengths, but I finished with a combination that tests well. This Pin was discovered by N6VOA. 6 MHz. Further, no one has to be wise to the fact that your attractive new flag pole sometimes radiates and receives RF while Old Glory is flapping in the breeze.
I have recommended it to many other ops since using one myself. This quadriflar helix built by W6NBC is used for receiving image signals from the NOAA weather satellites at 137 MHz. * Experiences of rain gutter antenna with SG230 antenna coupler (commercial link) * K5IJB rain gutter antenna * N3VEM rain gutter antenna * WB3GCK downspout antenna * WMOG's results with rain gutter antennas * W6NBC on rain gutter wire loop antennas (not loading up the gutter as such) Have you used a gutter antenna? Or even worked someone with one? ARRL - The winning article for the January 2019 QST Cover Plaque award is “The 2-Meter Slot-Cube Antenna” by John Portune, W6NBC. pdf Its not strictly a dual band beam - its two beams - a 3-el 2m and a 5-el 70cm, that clamp together in a crossed yagi pattern for satellite work. Build a compact dipole antenna that covers 40, 20 and 10 meters.
Can you find the loop? K eeping a homeowners’ association happy isn’t easy. Rev. This link is listed in our web site directory since Wednesday Mar 1 2017, and till today "VHF UHF Coaxial Dipole Antenna" has been ARRL has announced the winners of the 2018 QST Antenna Design Competition. Radials make a difference in SWR I've just completed and got on the air a 2m slot antenna built into a tv satellite dish, thanks to John Portune W6NBC for the instructions (and Dave KC2ZCG for the idea). net.
but unlike GMRS, VHF licenses are for one specific channel, not the entire band. hams) Best practices distilled into reference applications, readily adaptable to individual circumstances Reference designs that identify important Auto Added by WPeMatico. LECTURE 10: Other Practical Dipole/Monopole Geometries. Or maybe it’s time to concoct that servo-driven crossed yagi for auto-tracking the satellite… Welcome. Mag Loop Antenna By N6VOA.
CTIA/3GPP low gain antenna measurement. W6NBC January 2019. In a recent post N3GSE mentioned the new Force 12 OCF vertical dipole, item Sigma 20F-OCF basic and item FPA-20F-OCF with flagpole hardware . 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 The resource is currently listed in dxzone. tv .
A rain gutter antenna is the type where you'd really want to read about others' experiences before trying one. Most is still in original packaging. Resources listed under Antenna for 2 meters category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. The main category is Antennas for 2 meters band that is about Antenna projects for 144 MHz. The antenna can be stuck down the back of the shirt, carried, or easily mounted on bicycles, etc.
Home-brewing a satellite antenna is a terrific beginner’s project, and several designs are found at online locations. Discover (and save!) your own Pins on Pinterest. A large cookie sheet for example would work well (but look kind of funny). Simple j-pole antenna for 2 meter how to build a J-pole antenna for 2 meter band with many photos ecc. net is a Web site dedicated to ham radio (amateur radio).
Don Keith N4KC describes his top five antennas for amateur radio that enable new ham radio operators to get on the air quickly and begin making contacts. (Photo courtesy of the ARRL. 5" long. First, we'll reduce cost and then we'll add OSCAR sat- ellite Mode J capacity. Turnstile antenna.
(The folded dipole antenna. Basically you just need to install some insulators at either end of the guy wires, and then use the existing 300-ohm twinlead (if it exists) to connect to them instead of the antenna. The License Search here provides access to the most basic attributes of a license. Use Digital Voice Recorder to Record the pass and log QSO’s after the fact The Arrow antenna can be broken down and carried in a bag, and it will be my primary antenna to work satellites, but the 70cm part of this antenna came out perfectly resonant at 436. For what it is, it is the simplest most awesome antenna that a new or old ham can put up and it works great at both low heights and high heights.
- page 45 “An Efficient 2 Meter Antenna Disguised as a TV Satellite Dish” by John Portune, W6NBC Discover a “sneaky” 2 meter antenna that hides inside a satellite TV dish. A 2 meter (146 Mhz) J-Pole antenna that is inexpensive, and easy to build. They also operate in the HF frequency range(27MHz) Depending on the cb radio, antenna, and atmospheric conditions, cb radios can generally operate up to 50 miles. This PVC tower project cost less than $50. ham radio) Teaching materials that are effective for the particular audience (i.
Designed as a 20m antenna. COM. Another crafty thing I have heard of is using the guy wires of an old rooftop VHF TV antenna as an inverted-zep for HF. Together, the surfaces and shorting posts form a one-wavelength horizontal slot antenna. A Hawaii-based Amateur Radio Antenna Blog focusing on the theory, design, and use of homemade antennas.
com is tracked by us since February, 2018. The 2m beam on its own can be used for ARDF. He even has a very unusual slot antenna that can be mounted to the roof of a car or RV. I think I agree wholeheartedly with John, W6NBC about the "fear" of using open-wire line near ground or even close to metal. For commercial antennas on the amateur bands please use Commercial Radio Antennas below.
Sleeve antennas. Bundle and save with our OCF DX Flagpole Antenna and MFJ 998 RT remote tuner, ATU. I guess my specific question is if there is an alternative to the coax trap that could be used in a similar manner. 5 MHz to 50 MHz. Below is the finished antenna with an offset attenuator mounted on the end of the boom.
Making one into a slotted antenna for ham radio would be only practical in cases where concealment is paramount, as I would think you could make a more effective VHF antenna with less effort than that. SWR is more than acceptable with the tuner. 41 people interested. Electric sleeve dipoles are used for gain reference, efficiency reference for low gain antennas and chamber reflectivity evaluation (directivity, cross polarization, radiation pattern). Dipoles with traps.
The ULS License Search enables you to search for a wide range of licenses in the Universal Licensing System. the Radiation pattern is nutz when you try to model it. John joins Eric, 4Z1UG, on the QSO Today Podcast to discuss this and John’s other ham radio interests from Amateur Fast Scan Television to his Coat Hanger 2 Meter Yagi Antenna. Possibly a great solution for hams bound by CCRs. ) * QST 2009 ARTICLES * December 2009 ANTENNA: 160 and 80 Meter Matching Network for Your 43 Foot Vertical #1 30-32 ANTENNA: Antenna Patterns - What Do They Mean? W1ZR X CW: Beyond the Straight Key, the CW fast lane.
, the Index of /library/Electromagnetics/ File Name File Size Date; Efficient 2 meter Disguise Antenna Made from a TV Satellite Dish_ Slot Antenna_ John Portune W6NBC. a thin rectangular slot cut in a circular cylinder differs from that of a slot cut in a flat metal sheet because the distribution of electric currents is different for the two cases. The sleeve dipole is fed from one end of the antenna and therefore may be conveniently mounted either horizontally or vertically. The telescopic antenna fits into a slot in the rear case half, and secures with a small screw. also you need to license all the radios you intend to communicate with, not just your own unit, license is for the radio not the operator.
This is a 20' OCF Vertical-Dipole (DXV-20) HF Radio Antenna for 80-6M. Give it some heat and it tins nicely, being plated brass. Now I really need to get crackin’ on that backyard satellite antenna–maybe W4RNL‘s turnstile antenna (from the Aug 2000 QST), or W6NBC‘s quadrifilar helix antenna (from the Oct 2009 QST). Articles I have published. It's a NO-radials, vertical dipole 80-10/6m antenna.
I really like a lot of the aspects of this antenna design, I just hated making the traps (and they aren't quite tuned as well as I would like), but in the end I want an antenna that will fit in my (long, but not roomy) attic. Conical skirt monopoles. You will also get the K4OCE Minirig document. (3/2 λ) doublet with 31 (1/4 λ) ft of ladder line, then fed with coax. You are thinking of a "slot antenna" but just to realize that a "slot" in the "slot antenna" is the same size as a 1/2 wave dipole, the "slot antenna", besides that it will be directional (not good for mobile use) will be quite large which you do not want (the "RC toy" effect again) as well as difficult to mount.
QST has announced the winners of its 2017 Antenna Design Competition. PVC is not a great material to use for support masts due to UV John Portune, W6NBC, and Fred Adams, WD6ACJ. pdf - from January, 2012 QST magazine Links last checked 12/31/2018 K6LCS’ “modified” Arrow Sat Antenna - model 146/437-10WBP. A couple of note are the VE2ZAZ model, the AMSAT “Cheap and Easy Yagi” pairing, and the W6NBC tapemeasure Yagi dual-band. To lower the frequency only, you can add short stubs at the corners across from the feedpoint corner.
e. Keeping the Cost Down Presentation given by John Portune, W6NBC, on 1/16/2016 meeting of the Satellite Amateur Radio Club on Flagpole Antennas he has been working on. members submitted nearly 100 antenna designs in three categories: 160 Meters and Lower Frequencies, 80 Through 10 Meters, and 6 Meters and Higher Frequencies. 2019 | -- The Cavity Duplexer Book Home-brew design and modification princiiples In this slot antenna, the conductive surfaces are connected by two 3⁄ 4-inch diameter aluminum shorting posts. As for my "rubber duck" antenna, its the weirdist thing, I had it set up down low, mounted on my deck, and it seemed to work better then it does way up on the tip of my chimney, so now I'm all messed up.
John Portune, W6NBC, has a life dedicated to education from his early days at a British grammer school teacher to his current one day, all day, ham radio classes where hundreds of people have gotten their first licenses. Rated 4. It’s an antenna. It is not a plastic tube with a wire inside. I have made many contacts with ft-8 but other modes clearly show its’ limitations.
John Portune, W6NBC has a very interesting video out showing much more detail than seen in QST. I find this a lot easier too build than a J-Pole and the author claims his antenna will perform as well as a J-Pole. - eHam. The winning article for the January 2019 Q ST Cover Plaque award is “The 2-Meter Slot-Cube Antenna” by John Portune, W6NBC. UHF Whip Antenna 5/8, 5dBd, NMO - ArWestCom UHF Whip Antenna 5/8, 5dBd, NMO [30-587303-01, 30-587304-01, An UHF Antenna Ground Plane Disk Accessory UHF Ant Cable TNC (BNC, SMA)/NMO with pole mount antenna adapter is used.
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. It’s a flag pole antenna, and it complies with most neighborhood restrictions. The ARRL Antenna Book in the Internet Age - K3LR. Granted, every antenna is a compromise and a flag pole antenna is no exception. In this article we'll take that design two steps farther.
Requires antenna tuner. It was known for its strong emphasis on technical articles and for the lengthy editorials in each issue by its founder and publisher, Wayne You will need a wide-range antenna coupler to match it; the one built into your transceiver might not do it, unless you are lucky. 5 inches from the end of a slot, yields a stealthy antenna which can be used for 2m and 70cm. This is especially noticeable with a short whip antenna where signal levels at the antenna are very low to begin with. 2 dbi) and stealthy appearance (paint it the same color as your roof then clamp it to a vent pipe).
A Weather Vane Antenna for 2 Meters VHF incognito! Here’s a 2 meter antenna your neighbors won’t recognize. Only at eHam. 88 ft and 44 ft are popular lengths. I do wonder if the LNA stuff in the heads is worth anything, being low noise circuitry for a pretty high freq. Electrically short dipole antenna for the 40m band, DG0SA: Full 1/4 wave vertical for 40m, ON7AMI: High Performance 40 Meters Vertical, W6NBC: Indoor antennas for 40mt, EA5XQ: L’antenne W3HH - T2FD, ON5MJ: Kapazitive Antennen 7mhz and 3,5, DL7JV: Multi Band cage Dipole Antenna Project, N3UJJ: Prototipo di antenna per i 7MHz in 22cm, IW0BZD The winner of the QST Cover Plaque Award for October is John E.
Picks up faint signals and rocks the repeater with just Great for simplex and event nets. The first-prize winner of the 2018 QST Antenna Design Competition was a 160/80-meter loop antenna design by Steve Adler, VK5SFA High Performance 40 Meters Vertical Without Radials This shortened easy-to-build vertical, with no-radials, is made from surplus military camouflage poles. Discover ideas about Ham Radio Equipment. a 40 inch slot cut in a parabolic dish, fed with a so239 jumper about 4. - page 37 “Product Review” A quadrifilar helix, or QFH for short, is a near-omnidirectional antenna comprised of two square loops usually 1 wavelength long each, twisted a half turn and offset 90 degrees from each other.
The only controlled copy of this Data Sheet is the electronic read-only version located on the Cooper ussmann etwor Drive All other copies of this document are by definition uncontrolled This bulletin is intended to clearly present comprehen- Mag Loop Antenna By N6VOA. It took me about an hour to build it. Portune, W6NBC. The winning article for the April 2018 Q ST Cover Plaque award is “ An Ultra Simple 2-Meter Antenna” by John Portune, W6NBC. 2019 edition of Pacificon will be held at San Ramon Marriott, San Ramon starting on 18th October.
John Portune, W6NBC any hams have made 2 meter Lape hunting. In this week's Audio Alley Bob goes into detail about why you may or may not want a condenser microphone, interview with John Portune W6NBC, and a drone flyby of a enormous Antenna Farm. Message me if you are interested in any of these items at a great price! ICOM IC-7300 Transceiver, ICOM IC-SP-23 Desk Speaker, MFJ-461 Morse Code Reader, MFJ-4225MV power supply, MFJ-1640T antenna, ICOM AH-4 antenna tuner, MFJJ-269C SWR analyze, Heil HM-12 microphone, ICOM electret condenser microphone. All this time it was owned by John Portune of Private Registration, it was hosted by HostDime. Portune W6NBC jportune@aol.
My goals were also to keep the project as cheap as possible. A High Efficiency Extended Length Mobile Antenna The Force 12 flagpole antenna is a large diameter aluminum pole that is the actual antenna. twit. The SO239 chassis connector was designed to mate with a PL259, coaxial connector. com Revised January 2019 NOTE FROM THE AUTHOR: This book was written several years ago and based on hardware-store copper water pipe as the source of home-brew duplexer construction materials.
Howard Henderson of Kirkwood, Missouri is a HAM with call letters W0ZJR. "Dozens of entries were received, but only three could win," said QST Editor Steve Ford, WB8IMY. 73 Magazine December 1997 (#447) Distributed Capacity Folded Loop - This ceiling-mount antenna will really go to your head! . Stealth, No Radials, high performance, and very low losses from 3. previous round table shouts are in the shoutbox history sub-board.
There’s more to it than what is in your manual or on most how to do it websites! What more is required other than an SWR meter and properly setting the network components for matching the feed line to the antenna tuner? A Portable End-Fed Half-Wave Antenna for 80 Meters Rick Littlefield, Kl BQT Build a 9 to 1 Unun Transformer Stan Johnson, WOSJ Improve Workbench Safety with GFCI and a Kill Switch Allen Wolff, KC70 3D-Printed Coax-to-Wire Connection Blocks John Portune, W6NBC Super Simple 6-Meter SDR Transceiver James Forkin, WA3TFS Soldering Surface-Mount Devices Download >> Download 2m 1/4 wave ground plane antenna pdf Read Online >> Read Online 2m 1/4 wave ground plane antenna pdf antennas on the low, medium, and high power (1, 4, and 8 watts) settings and 2m one-quarter wavelength ground plane antenna target frequency was 147 11 Oct 1997 2 meter 2 element direct connect beam. Ideally, I'd like a magnetic mount, 3 foot whip max (I have to go in a parking garage often. A Durable, Low Proﬁ le 2-Meter Mobile Antenna A vertically polarized slot antenna designed to withstand the rigors of automotive rooftop mounting. The winning article for the April 2018 QST Cover Plaque award is “An Ultra Simple 2-Meter Antenna" by John Portune, W6NBC. With a little more weatherproofing, it will make a fine dual-band base station antenna of moderate gain (2.
This calculator enables you to test the design of an octagonal loop antenna and to answer "what if" questions until you arrive at a design that meets your needs without a lot of experience in electronics. With the antenna connected as in the WBR circuit, the signal first gets attenuated by the amplifier stage before the signal is regeneratively amplified, leading to a serious loss of sensitivity. Any antenna engineer could tell them that. some novel loop disguise techniques. ) I wanted to make a loop antenna for receiving WWVB based on the Amidon R33-050-0750 Ferrite rod.
Doublet – Multi-band antenna that is not resonant on a particular band. I've gotten a great report on a repeater about 30 mls away. Check out who is attending exhibiting speaking schedule & agenda reviews timing entry ticket fees. There are three ways to tune the antenna: (1) shunt a little L or C across the feedpoint, a short hair pin or cap of circa 10 pf. At Greyline Performance, this is really fun for us! We are honored to announce our speaker series.
Rather than continue to hijack the OP's thread I thought I'd start a new one with some modeling results. My previous vehicle was a pick up so it was an easy antenna mount on the tool box. ) 1. As I point out below, SO239 mounts are not waterproof when the antenna is removed, while NMO mounts are. Be sure to try and work the Ducie Island 2018 DXpedition and VP6D – Ducie Island is a small tiny island in the South Pacific Ocean that is part of the Pitcairn Islands.
Vertically polarized and The most common material for home building small ham radio loop antennas is common copper plumbing pipe. and they are for one specific geographic location, not the entire country. The antenna is designed to work with a tuner. I worked out a better way to build one, built it and it seems to work fine. Multi-band with antenna tuner.
The current QST has an interesting article on using a DirecTV satellite dish as a 2-meter antenna. I ran across his testing well after I did some of my own (with twinlead, some old RS 300 ohm stuff, and a leftover chunk of 450 ohm window line). It is an indoor antenna or antenna for restricted space. In general, the slot antenna is not free to radiate on both sides of the surface on which it is cut because one side is either completely enclosed, e. I would like Discover ideas about Ham Radio Equipment.
Portune, W6NBC, for his article "The Quadrifilar Helix as a 2 Meter Base Antenna Station. CB radio are also low wattage radios but they put out 4 watts on AM and 12 watts on SSB if the cb radio has SSB capability. This uses the type 33 material and is 1/2" diameter by 7. I soldered the coax "stinger" center to the antenna, it was screwed down before with the screw The Classic Rain-Gutter Loop Antenna – Is it any Good? A simple technical look at an HF horizontal loop of wire strung around your house at rain-gutter height, plus. 40m-10m DELTA LOOP ANTENNA - GU3WHN The variety of one wave length loop shapes that can be deployed to suit the QTH .
Another pretty good website by Grant Maclaren Portable Loop Antenna. Previous Thread Next Thread My MFB-269 antenna analyzer: Had such a thing existed 20 years ago (thou if it had I was too poor to afford one) it would have saved me SO MUCH time and energy. Please do not add or edit any content within this section. G5RV – 102 ft. The QST Cover Plaque Award -- given to the author or authors of the most popular article in each issue -- is determined by a vote of ARRL members on the QST Cover… You can make a nifty 2 meter antenna out of those, especially useful if you live somewhere that doesn't allow a normal antenna.
Antenna “Book” Essentials Curated material, reviewed by experts, selected for the particular application (i. Extended Double Zepp – Longer than a dipole Sleeveless Sleeve Dipole Feed Line Choke Coax Coax Feed Point Figure 3: A Sleeveless Sleeve Dipole Antenna The solution to the vertical mounting dilemma is a type of antenna called the sleeve dipole as shown in Figure 2. w6nbc antenna
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