Jan 11, 2010 · Homemade Dipole 11 Meters Posted on January 11, 2010 by admin As per the requests of “Bullets” from www.cbradiotalk.com, the largest CB Forum on the internet, I am posting a few photos of my Home made Dipole antenna that is giving me SWR readings of 1.3:1.3 MR300 Digital Shortwave Antenna Analyzer Meter Tester 1-60MHz RF SWR for Ham Radio 9.5 9.0 9.6 3: NanoVNA-H Portable Handheld Vector Network Analyzer 10KHz-1. Digital Display Touching Screen ...

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Great deals on 2 Meter Swr Meter. Be prepared and able to communicate in case of emergency with the largest selection at eBay.com. Fast & Free shipping on many items!
Got the 6-meter Dominator in. I am amazed - from the time I opened the box. The antenna went together in less than 10 minutes. Was in the air in another 10 minutes. Whoever gave thought to the assembly of this antenna is a genius! Great contacts on FM and SSB. SWR is fantastic.

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Dec 07, 2017 · I seldom actually use my MFJ-498 as a tuner, but as an SWR meter, power meter, and antenna switch box, it’s worth the MSRP ($170) right there. The ability to tune non-resonant antennas (way beyond the 450D’s 3:1 tuner range) and a 4:1 balun for balanced line and random wires opens up a lot of doors for a new ham too. Aug 12, 2016 · As I suspected, the extra turn made little difference. The SWR was 6.5:1 on 7150 kHz. (As an aside here, I have to comment on the AA-170 antenna analyzer. In a word, it’s fantastic. One of the functions we used, for example, measures the SWR of antenna at the midpoints of all the amateur bands.
Low SWR 2m band, 10 mHz on 70cm; ... NOW 4 elements on 6 meters and 8 elements on 2 meters & 70cm! "KINGBEE III" 8 EL 70CM, 8 EL 2 Meter, 4 EL 6 Meter.

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Jul 03, 2019 · A frequency meter or a grid-dip meter, a dummy load or an in-line SWR/power meter. An isolated trimming screwdriver and a regulated 12-V power supply. Attach a little TO-220 style heat-sink to the tab of T3.

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Here is the antenna already built and SWR is being adjusted. A good way to adjust a Yagi antenna , is by facing the antenna straight up , so the reflector is parallel to the ground or in this case at an angle.

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Oct 03, 2013 · Prototype #2 was a "4 Band" ( 40 - 30 - 20 - 10 meters) antenna. The first (and most important) goal was to get the FULL 40 meter band at less than 1.5 SWR, calculations showed this would require a cage of almost 6 inches. One big consideration was weight, 4 cage dipoles for 40/30/20/10 uses almost 1,000 feet of wire.

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a lack of antennas for the low bands: 160 meters and 80 meters. A few years ago, I acquired a multiband commercial antenna called a half-sloper. This antenna, the Alpha Delta DX-B, is a trapped, quarter wave single wire sloper for 160, 80, 40 and 30 meters and has been installed at the 55' level and slopes to about 25' off the ground.

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Mar 10, 2015 · SWR (75 ohms) = 1.5 ** 1 Like. Aerial advice. tjowen August 6, 2015, 3:51pm #13. Can this me made a sticky, so it stays near the top for the newcomers to find easily? ...

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How to Build a DIY 2 Meter J-pole Antenna If you are looking for an inexpensive, and easy to construct antenna, the J-pole antenna is a great one! In about an hours time, and about $15 worth of materials, you can have a great performing omnidirectional j-pole antenna.

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Standing wave ratio meters come in a variety of forms, but essentially they are all used to measure the SWR, standing wave ratio on a transmitter feeder. Understanding how to use a SWR meter is relatively easy, but sometimes knowing how to interpret the results and their limitations enables far more to be gained from using a VSWR meter.

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The obvious problem is that your coax will be longer than it needs to be. That is not a big deal on 2 meters were a worst case is the coax will be about 3’ longer than needed to reach the antenna. On 160 meters it could be about 250’ longer than needed to reach the antenna. For that reason I have only used this technique on 10 meters and above. Mar 16, 2018 · Homebrew SWR and power meter First of all, this SWR meter in this article is not exactly homebrew, as I based the circuit on the schematic in the excellent book Arduino Projects of Amateur Radio . Although I bought the book and respect the copyright of the authors I will share my own schematic here.

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antenna and transmission line and therefore increased voltage standing wave ratio (VSWR). Superposition of forward and reflected waves along the transmission line produces standing waves resulting in maximum and minimum voltage amplitude locations. VSWR is the ratio of the maximum to minimum transmission line voltage amplitude.

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The Ham Radio Workbench K6BEZ Antenna Analyzer is a DIY SWR meter for analyzing the SWR of your HF antennas. This design uses an Analog Devices Direct Digital Synthesis signal generator and an Arduino to sweep the HF bands to find the lowest SWR. The results are displayed on a 16x2 LCD.

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Here is the antenna already built and SWR is being adjusted. A good way to adjust a Yagi antenna , is by facing the antenna straight up , so the reflector is parallel to the ground or in this case at an angle.

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Browse our wide selection of SWR, Power, Modulation, Marine Field, multi meters, and much, much more! COVID-19 Notice: Our business is open and we are shipping orders. Please understand that there may be possible delays in delivery/transit times due to carrier restrictions. Amazon.com: MFJ-862 MFJ862 Original MFJ Enterprises SWR meter, 144/220/440MHz, 30/300W Spencer Sholly RT(R)(ARRT) Radio Stuff- Meters, Test Equipment, and Such Metal Bending Tools Metal Working Tools Metal Tools Wood Working Metal Projects Welding Projects Metal Crafts Diy Projects Homemade Tools

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Table 6. Boundary frequencies within SWR = 4 limits. From table 6 it may be concluded that starting form model 6, all antennas comply well with the 4 -bands target. In fact model 9 also covers a large part of the ten meters band without sacrificing performance on lower frequencies, so this should be the model to go for.

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Adjusting the SWR is just matching the electrical length of your antenna to the desired frequency. This ensures that the impedances of the feedline and the antenna match perfectly, so that all available power is being radiated. To tune your antenna, you will need to use a SWR meter. This device is attached between your antenna and radio.

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Here is the pattern of the 160/80 meter antenna on 3.90 MHz: This antenna is tuned by the following procedure: 1) Put up the entire length of wire and the 4:1 balun and resonate it to the upper end of 80 meters by lengthening or shortening it. 2) Check to see that a good SWR can be obtained in or near 160 m.

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The tuning process is the same as for the 40/80 dipole, excpet the 20 m wires are trimmed first to an SWR of 1.8:1, followed by the 40 m wires then the 80 m wires. Repeat until the SWR on each band is below 1.3:1.

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    Jun 01, 2010 · Using the 468/F MHz half-wave antenna formula I calculated the 6-meter half-wave length and multiplied by 3 to arrive at the total length for 3 half-waves on 6-meters and a half-wave on 17 meters. I had black plastic tube clamps for one-inch tubing and also two feet of 1-1/8 inch fiberglass tubing ( greenish tubing that I used inside for ... How to Build a DIY 2 Meter J-pole Antenna If you are looking for an inexpensive, and easy to construct antenna, the J-pole antenna is a great one! In about an hours time, and about $15 worth of materials, you can have a great performing omnidirectional j-pole antenna.

    Aug 01, 2020 · The SWR meter is an exact indicator which must be adjusted correctly. The SWR meter makes the entire process more serious and professional than just turning the antenna in different directions. SWR meters are not expensive and are easy to find. It is possible to tune a CB radio without a SWR meter. Apr 27, 2020 · It was working as specified on the Diamond booklet. The SWR was 1.2:1 on 80-meter and 1.4:1 on 40-meter. I am sure I could have had a better SWR if the antenna was higher. After installing the antenna on top of the fence, the best SWR I could get was 1.7:1 on 80-meter. But this is normal: at 3m height (9 feet), the antenna is too close to the ...

    The elements should be spaced around 10mm apart. The antenna will display some gain and uni-directionality, so point the smaller antenna loop (driven element) towards the RF source you wish to measure. I tried connecting the antenna directly to a microamp moving coil meter, however there was very little meter deflection from a Wireless LAN card. Homebrew SWR and power meter First of all, this SWR meter in this article is not exactly homebrew, as I based the circuit on the schematic in the excellent book Arduino Projects of Amateur Radio . Although I bought the book and respect the copyright of the authors I will share my own schematic here.An SWR meter is an integral tool for all ham, CB, marine, and aviation radio operators. All radio antennas must be tuned to ensure top performance and to avoid damage to your radio system. A poorly tuned antenna will create interference in your signal and diminished range. But worse of all, a radio antenna that is not properly tuned can send ...

    7. What is the SWR curve look like at the transmitter end of my feedline? 8. Can I place another antenna on the same support without deteriorating the performance? 9. Where should I place another antenna structure in my yard to minimize its effects (or improve its effects)? 10. What SWR at 10 feet results in a given SWR at 40 feet? 11. Double Bazooka Coaxial Dipole Antenna Info There is a lot of controversy surrounding the Double Bazooka Coaxial Dipole. Its bandwidth claims have sometimes been exaggerated. On this page I give details of how to build two different versions of the Double Bazooka Antenna. One antenna uses all coax the other uses coax and twin leadRead More...

    Jan 29, 2019 · Tuneable for lowest SWR reading. Description Solarcon A-99 is the highest gain fiberglass antenna on the market. Works with GPK-1 ground plane. This high power antenna handles 2000 watts of power, and is insulated up to 14,500 volts. Can be used for export, commerical and 10 meter ham. The SWR meter or VSWR (voltage standing wave ratio) meter measures the standing wave ratio in a transmission line. Three wattage settings of 10,100,1000. Search results showing audio plugins for all operating systems (Windows, MacOS, Linux, iOS and Android), tagged as VU Meter. 5w 150w 80w Demodulator 500w 7w 600w Projects 350w 3kw 2kw 5kw 10kw ... – No, but do not use SWR meter in coupler if not 50 Ω. • True open wire #12ga. 600 Ω transmission line has lower loss than 1/2” 50 Ω coax. – Generally Yes, however if load is 5+j0, SWR on 50 Ω line is 10:1 & 120:1 on open wire line. Loss for 100’ at 7MHz is 2.12dB (open wire) & 1.02dB (LMR-500). • Couplers should not be cascaded. Antenna Reflection and SWR Calculator: Arduino RF power & SWR meter, ON7EQ: Externe s-meter for YAESU FT-857 EN FT-897, PI4FRG: FT Meter per Yaesu FT-857 / FT-897: FT Meter Yaesu 897 e 857, I6IBE: HF Low-Power meter based on temperature measurements, ON7AMI: H.F. Directional Power Meter: Homemade UHF SWR meter: Half-Wave Dipoles - Feedline VSWR Google 'Homemade SWR meter', 'Homebrew SWR' or things like that and you'll get lots of links with schematics, photos and often descriptions of just how to build a simple and useful SWR bridge. If the link above seems within your comfort zone for homebrew, then by all means that's a very nice design but I'd expect most hams just starting to get ... The graph shows the SWR and impedances. Note that the SWR minimum and zero reactance coincide at 1.905 MHz. 160 meters is one of the most challenging bands, since the roughly 200 KHz bandwidth is about 10% of the frequency of 2 MHz. Similarly, on 80 meters, 500 KHz is more than 10% of 4 MHz.

    Jan 03, 2011 · I supplied the SO-239 to 3/8 connector and prepared the project with the most precise measurements, assembled and using Yaesu Ft2d handheld radio and Surecom swr-pwr meter. I set it to swr 1: 1.0 at 145,000 MHz. For 420,000 MHz, I set it to 1: 1.09 and smaller. I have made the antenna usable by using a 3 meter long aluminum frame profile directly.

    WiFi SWR meter - An home made SWR meter for 2.4 GHz. A DIY SWR meter that allow precise measurements and calibration of any WiFi antenna. This is test equipment everyone who build wifi antennas should have in their shack. Article is in french and include some videos.

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