Slim Jim Antenna Project - VU2RMU. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. Slim Jim 2M Antenna - SV5BYR. L.B. Cebik web site - requires registration (free) Commercial 2M 70cm Slim Jim - N9TAX. 2M Slim Jim antenna using Aluminum Tubing. Some Notes on the Slim Jim Antenna - M0UXB. Slim Jim Build. Handmade Slim Jim Antenna by .n9taxMay 19, 2020 · Six Meter Folded Dipole Antenna; 2 meter/70 cm telescopic dipole, homebrewed; Simple to make 2m/70cm antenna project for portabl... Homemade Full Wave Dual Band Antenna for 2 meter a... MFJ Duplexer-two radios one antenna or vice versa; Idiot's Guide to Wire Antennas; My low cost 10 meter DIY; Ground Radials for Vertical AntennasOption 4: mount it along the truck bed rail all the way at the rear of the truck… old school CB style. Option 5: I've got Thule truck rails (similar to a ladder rack). Made of aluminum and the cross bar is about 4 inches wide. Surely there's a way to mount an antenna to the outside edge of the cross bar.Antenna, Yagi Beam, 2 Meter/70 cm Wideband, 10 Element, 6.10 ft. Boom Length, 350 W Power Rating, Each. Part Number: CSH-A27010S 3.8 out of 5 starsDec 18, 2008 · A local friend that I told about this antenna project built it today. Took him 45 minutes and cost him $12. Instead of using stainless steel for the elements, he used brass. He also tightened up the gap between the 2m/70cm sections seen in these pictures; the pics were taken before he corrected them. Nice job, Wayne! Here are the pics:If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by usingThis two band antenna is using the VK2ZOI design - a version of the "Flower Pot" design (http://vk2zoi.com), for 2m + 70cm: It's called the "Experimental Dua...Step 2: Design. A: 275.7mm. B: 746.2mm. C: 103.7mm. D: 29.8mm. E: 142.2mm. The construction itself is very simple; measure and cut all pieces to length, sand down the ends lighty to remove any burr, apply solvent and pressure fit. It is worth doing a dry run to make sure all measurements meet above figures before gluing and you may find the ...If you build the antenna as shown, the computer model predicts 11 dBi gain and a front-to-back ratio of 20 dB. ARRL Lab measurements confirmed the computer-predicted antenna pattern. You may wish to read further about tuning adjustments in The ARRL Handbook. It describes how to check the antenna with a field-strength meter, or by using2 meter antenna tuner project. October 05, 2022. 2 METER ANTENNA TUNER , ONE EVENING 2 METER TUNER PROJECT, Most active radio amateurs have an antenna transmatch (i.e. "tuner") to reduce swr and provide an impedance match to their transceivers.2m-70cm_vertical_lengths. Design I used for my dual band dipole for 2m/70cm - http://www.amateurradio.bz/2m-70cm_vertical_dipole_antenna.html ...Member. I'm looking for a suitable antenna for my Jeep, which I use almost exclusively off road. The need is a no ground plane dual band antenna that's capable of transmitting across all 2M, 70cm, and GMRS frequencies. I'll spend most of the time on the 70cm and GMRS frequencies, so 440-470 MHz. Ideally, I'd like an antenna no longer than 36 ...Prototyp OSJ-Antenne Duoband 2m/70cm. Prototype OJS-Antenne Befestigung. Entgegen der Behauptung, dass durch den Abstand der Stäbe eine Richtwirkung einträte, kann ich bestätigen, dass dem nicht so ist. Jedoch gibt es aber eine leichte fast unmerkliche Abschwächung im 70cm-Band in die Richtung des langen Abstimmstabes.That is why they are used on satellites. Lots of hams use both 2m and 70 cm QFH antennas - often on the same mast- Just keep them at least a few meters apart - and again- preferably dont use them for transmitting without some kind of relay switch to disconnect a nearby receiver if transmitting. 0. true.Easy 2 meter SSB Loop Antenna. Here is a great design and build instructions for a nice 2 meter SSB loop antenna. 2 Meter Halo Antenna by Mike Fedler N6TWW has the detailed instructions on his site. Here are some initial notes from the link... There are two previous versions of my loop antenna that were built before the antenna you see now.A coaxial Collinear antenna for 2m and 70cm mostly made from junk bits and pieces for less than £1 - YouTube. Oxford Shortwave Log. 9.13K subscribers. Subscribed. 100. 10K …I tested my antenna on the local N4NRV input frequencies for our two repeaters. With a 50 foot length of RG8, and the antenna 20 feet in the air, SWR was a respectable 1.13:1 for the 147.780 MHz input frequency, and 1.01:1 for the 449.650 MHz input frequency. I was so pleased with my results that I purchased enough materials to construct ...=====More information on my website at http://www.fuzzthepiguy.tech=====Here are the measurem...The dimensions are below: The dimensions of the 2m beam antenna, centered on 144.4MHz. Click for a larger image. Horizontal radiation pattern. Vertical radiation pattern. Elevation plot with the antenna at 5 metres above ground, for example in a portable set-up. Peak gain 17.1dBi at 6°.First 2m/70cm antenna build. Recently I finally finished my first home brew antenna. An aluminum open stub j-pole Finding the 3/8 aluminum rods was the hardest part as it had to be bought from a metal yard near me but they don't like to do one piece type orders.Challenged myself to build a usable Yagi style antenna for the 2 Meter (2M - 144MHz) amateur radio band. The challenge part is that I wanted to use stuff I had lying around, and I wanted to build it using the fewest possible tools. Definitely no electric powered tools, so that this could be replicated in an emergency, no-power situation.I was able to measure 1.3 dB insertion loss through the 2m path and less than 2 dB of insertion loss in the 70 cm path, though admittedly I performed this measurement using a edge launch connector to measure the performance before the enclosure arrived. The next step will be to get this on the air! 2m/70cm Duplexer. 73s,Build the two separate sides of the dipole and ensure both sides are extended to the same length. Make use of your tape to measure the length and confirm they are equal. Choose the right wire for construction. The antenna wire is one of the most important aspects of dipole antenna construction.Element phasing: 3 - 1/4, and 3 - 5/8. On 2m this antenna is phased as three 1/4 wave elements one above the other. A 1/4 wave on 2m is 3/4 wave on 70cm, with a little electrical "magic" on 70cm they are reduced to 5/8 wavelength, and act as three 5/8 elements stacked one above the other. Some more electrical wizardry is done in the matching ...Fig. 1 Ultra-simple "wire" version above made on an SO-239 connector. Designed for hanging from any handy support and can be hung from trees, used inside motel rooms or as a "stealth" antenna. Fig 2. Table top "wire" version above using a dowel or other simple base. Upper and lower elements must be self supporting.The yellow trace is the VSWR reading from the antenna analyzer. One pink asterisk is at 2M, and two pink asterisks is at 70cm ham bands. Zooming in on 2M shows a slightly better SWR than the full spectrum, at between 1.5 and 3 across the band. The VSWR of 70cm was below 2 across nearly the entire band. STEPS #22 to #25: COMPLETE THE ANTENNA. 22.To make it more durable, I decided this time, I would build the antenna from a piece of wood for the backbone, and with copper pipe for the elements as it is easy to cut. A trip to my local Bunnings, and I had left with: Porta 40 x 18mm 1.2m Pine DAR Clear Solid AU$7.58. Porta 12mm x 0.9m Clear Pine Dowel AU$2.45.Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 1 How to Build a Dual-Band Antenna for 2M/70cm. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 ... 10. Finally, adjust position of bracket on conduit for best 2M SWR. 11. Tighten and check all hardware 12. Weatherproof entire area above and between conduit andDualband Antenna's. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi - compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna's. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements 2m VHF YagiStep 4: Measurements. The developed antenna has been measured with a VNA in terms of SWR and S11 parameters. The result shows that antenna has a bandwidth between 419.5 and 451.2 MHz with the respect of SWR of 2:1, which is more than enough for the 70 cm band (430-440 MHz). F4HWK.In this video, members of the Stamford Amateur Radio Association W1EE, show us how to build a ZS6BKW antenna capable of covering the 80 to 6 meter amateur radio bands. Here are the guidelines offered by this construction team: "The ZS6BKW is the successor to the G5RV.Retrieve the Slim JIM loop and begin inserting the disc separators. Insert the element at one hole at a time at the top of L2 then slide it onto L1 until the second hole aligns with the tip of L3. Insert this wire into the second hole and continue pushing to the top of the element. Do the same with the others.Northeast PA. Apr 30, 2020. #8. As with the Diamond SG7500 the OP is considering, the NR770HB is also a mobile antenna, and will not do well without a ground plane. The suggested Dr Fong DBJ-1 is about 1.6 meters long, but has similar gain to the Nagoya antenna the OP is using now and WITHOUT needing a ground plane.Slim Jim Antenna Project – VU2RMU. 2 Meter Slim Jim Antenna using 300 Ohm Twinlead. Slim Jim 2M Antenna – SV5BYR. L.B. Cebik web site – requires registration (free) Commercial 2M 70cm Slim Jim – N9TAX. 2M Slim Jim antenna using Aluminum Tubing. Some Notes on the Slim Jim Antenna – M0UXB. Slim Jim Build. Handmade Slim Jim Antenna by .n9taxDescription. OSJ 146/440. Dual Band - 2 Meters & 70 cm - Solid Aluminum - End Fed (SO239 Connector Only) OSJ 220. 220 MHz. End Fed (SO239 Connector Only) OSJ - VHF. Wide Band Width (150 - 162 MHz.) Solid Aluminum - End Fed (SO239 Connector Only)Figure 3: 2m dipole or J-pole (free-space) vertical radiation . pattern (black) and the same antenna on 70cm (red). Fortunately, there is an easy solution. Install 70cm stubs on the 2m antenna to create a good UHF radiation pattern. Many commercial HF antennas use this technique to achieve good patterns on their multi-band antennas.Step 4: Measurements. The developed antenna has been measured with a VNA in terms of SWR and S11 parameters. The result shows that antenna has a bandwidth between 419.5 and 451.2 MHz with the respect of SWR of 2:1, which is more than enough for the 70 cm band (430-440 MHz). F4HWK.If you don't mind shifting your DIY attention to a home-brew 6m/10m vertical (perhaps a trap implementation), you might look at a triplexer like this that gives: low pass at <90 MHz for 10/6m; mid pass at 130-200 MHz for 2m; hi pass at 380-500 MHz for 70cmMar 18, 2013 · 2m Eggbeater II The 2 meter loops are 51 cm wide by 63 cm tall; 2 meter the reflectors are 100.5 cm long and 101 cm below the driven elements. 137 MHz WX Sat Dimensions The loops should be built with # 8 AWG wire and the reflectors should be increased to about 1/4" diameter. The loops will be 54 cm wide by 66.5 cm high.The yellow trace is the VSWR reading from the antenna analyzer. One pink asterisk is at 2M, and two pink asterisks is at 70cm ham bands. Zooming in on 2M shows a slightly better SWR than the full spectrum, at between 1.5 and 3 across the band. The VSWR of 70cm was below 2 across nearly the entire band. STEPS #22 to #25: COMPLETE THE ANTENNA. 22.The first reference that caught my eye was the $4 Ham Radio Satellite Antenna. I saw this web page a couple months ago, and was thinking about building it, but haven’t gotten around to it yet. It looks like a very cool and easy project. One thing I was wondering about is why the 2m and 70 cm elements aren’t perpendicular to one another …Antenna, 2m/1.25m/70cm Bands, 144/220/440MHz, Power Handling 85W for 2m, 50W for 220/440 MHz, 7.5 in. Height, NMO Mount, Each. Part Number: CAN-2M-220-440. 4.42 out of 5 stars. Estimated Ship Date: May 28, 2024 if ordered today. Free Shipping; Multiple Images; VideoI built a couple of these out of 12 ga. wire with two 70 cm resonators and one out of 1" tape measure with one resonator. It appeared to me that adjusting the spacing can get the imedance on 70 cm real close to 50 ohms. I have no way to measure the radiation pattern.Don't worry about it. In a general purpose FM antenna, little bit of feedline radiation can be even useful, makes it work better against horizontal antennas. A sleeve balun could be an option. Thick tube (1inch or more) over the coax, open at feedpoint, shorted to coax shield at far end, 1/4 wavelengths long at 2m, 3/4 waves at 70cm.There are exactly two ways to pick up digital channels on your television set: You can use a digital antenna, available at most major electronics retailers, or you can sign up for ...My first dipole antenna with cost breakdown. It comes out to about $40 if you have to buy everything, $12 if you already have some electronic / hobby-type ma...Everybody is aware of the purpose of a TV antenna. But very few people know that creating an antenna at home is a fairly simple process if you have some basic skills. This is also ...2 Meter Vertical Dipole Antenna. I was looking to build an easy to breakdown 2 meter antenna for an event I was helping with. I have issues with J-poles, and while easy to build, I think they interact with their feedlines way to much. 1/4 wave ground planes work well, but will have half the signal of a dipole.Build a 2m VHF lightweight sleeve dipole antenna. A compact portable antenna and easy for deployment. You can even operate the dipole while holding it. Building it is easy just follow the antenna plans below. The antenna specifications are below including the testing video. Wiring the Feedpoint. Antenna Measurements.Not so long ago I built my version of The Home-Brew SKYLAB Starduster for 26 - 30MHz, Super simple to build with just 10 metres of wire and a length of coax....Mar 19, 2023 · Those work ok on 2 m but on 70 cm the radiation pattern is terrible. The YT clowns have probably never heard of antenna modeling. A better design is to make a 2 m dipole with one (or two) closely spaced (about 1 inch) 70 cm 1/2 wave parasitic element (also called coupled resonator).This is post 2385 in a continuing series of simple ham radio antennas. If you want a basic two-element curtain array, try this "Lazy H" antenna from Hiram Vazquez. The "classic Lazy H Antenna" consists of two horizontally-polarized dipole elements which, under excellent conditions, can deliver up to 3.42 dBd over a standard dipole antenna.Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). The antenna has good reflection coefficient and VSWR ratio @ 1.2:1 at center frequency and 1.7:1 at band edge. Antenna Specs from 4Nec2This video shows my dual band antenna that I made for use on the 70 centimeter band (432 MHz) and the 2 meter band (144 MHz). It is horizontally polarized an...Is your Ham Radio HT rubber ducky letting you down? Do you want to transmit a stronger signal to the repeaters? If so, I'll show you how to build a two meter...That means you might get away with an antenna the works over the range of two services, like Ham 70cm and GMRS, or Ham 2M and MURS. Manufactures typically spec the usable bandwidth of their antennas at the 1.5:1 SWR points. Practically most radios are OK up to a 2:1 SWR.Rated 5.00 out of 5 based on 13 customer ratings. ( 13 customer reviews) $ 65.00. The Signal Staff is a dual band 2 meter / 70 cm Open-Stub J-pole from S&K Antenna Systems! This is a new antenna for us here at Signal Stuff made by S&K Antenna Systems who are friends of ours and have assisted in many aspects of Signal Stick manufacturing!This is a really easy, fun antenna to build. If you are new to Amateur Radio, or just want an easy to deploy 2 Meter antenna for out in the field, this is a...One of the easiest and quickest antennas to build is the Vertical Bazooka, which is made entirely from RG-8U coaxial cable. ... practical considerations of mounting and support tend to limit it to the span from 10meters (28mhz) to 70cm (440mhz). ... The SWR is under 1.5 across the entire 2 meter band. It measured 1.3 at each end and 1.1 in the ...I've been wanting to make this video for a while. This little handheld 2m/70cm Yagi is an easy build, and it performs really well on both bands. I've worked ...The slot antenna may be well suited to this purpose, particularly for smaller attics given its horizontal orientation with vertical polarization appropriate for local 2M FM repeaters. The 70 cm Build: For a half-wavelenth 70cm band slot of 33.7cm (λ/2 = 150/445 = 0.3370M or 33.7cm) was cut just below the 2M slot with two holes drilled for a ...Build it yourself a Dipole for 2M/70CM - Got time on your hands because of the Covid19 lockdown well time to build.. You can build this anytime Ham Radio 14...BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER ... 80m - 2m. 100W PEP - 30w carrier. just a simple tuner. Tuner mark 2. 500m - 70cm. ... Normal use will be HF and perhaps some circumstances in VHF bands. I have tuned my HF antenna to 70cm but only as a test.Connect the coax cable to the 2 parts of the driven element near where they enter the wooden beam. Wrap the cable's inner wire around the short leg of the J, and the twisted outer wires around the long leg. Solder the wires in place. Secure the coax cable. Secure the coax cable with a couple of zip ties. Your antenna is done!The new 2M/70cm has higher gain and is mounted 10 feet higher than the previous antenna. The 6M HO Loop is very narrow-band, but the SWR is nearly perfect at 50.3 MHz, so it will be great for digital and CW work. I did tune to 50.313 MHz and could hear and decode lots of FT8 from stations participating in the ARRL June VHF Contest.The more common coax collinear requires a PVC radome to give it rigidity and weather proofing, and assembly can be difficult. The 2 - 440 Collinear vertical in this project is simple to build and expand, semi rigid, self supporting, water tight, electrically sound, and a professional appearance when completed.Email list: http://eepurl.com/iGP0CkPlans including the STL files: https://www.patreon.com/HamRadioRookie/shop/fara-j-2m-70cm-antenna-88511Patreon Membership...My mobile setup is a AnyTone AT-778UV feed to a Diamond A320 Tri-band Mobile Antenna mounted to a Diamond NMO hood mount, fed through 18ft of 50hm RG8, SWR and Smith readings as follows; 144.000MHz: SWR = 1.1795, Smith = 44.94Ohms / 6.61 nH. 148.000MHz: SWR = 1.3191, Smith = 63.14Ohms / 1.28 pF.Mounted to the horizontal cross piece with 2 U clamps, long legged muffler type clamps. Top of antenna is about one inch below the ridge beam. Bottom of antenna is approx 25 feet above ground level. Using 400 flex type cable (ABR brand from HRO). Just try to keep it away from any metal, vents wiring etc.Dualband Antenna’s. 2×4 2m/70cm Compact Satt Comm Antenna; 2×3 2m/70cm Cross Yagi – compact build; Build 3 x 5 2m/70cm Cross Yagi 145-435Mhz; Build the 3 x 5 Elements 2m/70cm Yagi; VHF antenna’s. 2 Elements Yagi 144Mhz; 7 Elements Yagi for 146Mhz band build; 2 Elements Yagi build for 107Mhz FM Band; Build the 5 Elements …To make it more durable, I decided this time, I would build the antenna from a piece of wood for the backbone, and with copper pipe for the elements as it is easy to cut. A trip to my local Bunnings, and I had left with: Porta 40 x 18mm 1.2m Pine DAR Clear Solid AU$7.58. Porta 12mm x 0.9m Clear Pine Dowel AU$2.45.This photo shows the parts of the antenna before assembly. All the soldering is done. Simple Ground Plane Antennas for. 2 Meters, 1.25 Meters and 70 centimeters. Radiator. The completed antenna. This model happens to be the 70 centimeter unit but the only difference between this one and the units for other bands is the length of the radiating ...This doubles as a 3/4 wave "radial" on 70cm since its the 3rd harmonic or fairly close, though that will look like an off center fed vertical on 70cm. This is why many dual band base vertical antennas only have a set of 19" radials, they also do the job at 70cm as 3/4 wave radials. 2. 2E1EPQ.=====http://fuzzthepiguy.tech/yagi-2/=====#hamradioporn #antennas #cw #dx #pl #radioamadorism...Build it yourself a Dipole for 2M/70CM - Got time on your hands because of the Covid19 lockdown well time to build.. You can build this anytime Ham Radio 14...Mhz so it can generally covers the whole VHF amateur band. -Connect a SWR meter to the antenna and to the radio, making sure you attached it to the right connector posts. -Take a SWR reading, and if it is beyond 1.5, cut the 19.5" VHF element rod 1/8" at a time until the readings is in between 1-1.5. -Theoretically , a reading of 1 is the best ...I show you how to quickly build a DK7ZB yagi with 4 elements on 2m and 5 elements on 70cm with minimal tools.Plans are available from https://www.qsl.net/dk7zb/NOTE: Comparative testing of this antenna against one without the "choke" showed that the choke is NOT needed.Homemade vertical dipole for HAM 2 meter and 7...Antenna, Vertical, High Gain Base, HD Fiberglass, 2m/70cm, 330/250 W, UHF Female/SO-239, 17 ft. Height, Each Part Number: DMN-X510HDM 4.56 out of 5 stars ( 25 )Watch how Pablo Sala, a radio amateur from Argentina, demonstrates the use of a fox hunt coax loop antenna for direction finding. Learn how this simple and portable device can help you locate .... Industrial robots are expensive. But, then, Slim Jim Antenna Project - VU2RMU. 2 Meter S 2 Sept 2022 ... Dual band Yagi for 2m and 70cm with 4 elements on 2m and 5 elements on 70cm and one feed point, designed by DK7ZB. A great antenna for ... NOTE: Comparative testing of this antenna against one w How To Build A DIY 2M Roll-Up Slim Jim Antenna (Including How To Crimp A PL-259 UHF Connector Onto RG8X Coaxial Cable): Step-By-Step Instructions. March 1, 2022 by …Registered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted. Review Summary For : Larsen glass-mount dual band antenna. Reviews: 31. MSRP: 80 approx. Description: Larsen's version of the thru-glass VHF-UHF mobile antenna. Product is in production. If you need a quick, free, and easy-to-install antenna for 2m and 70 ...
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