Homebrew Vhf Antenna

Apr 26, 2019 · Arduino Uno based graphical SWR HF/VHF 160-1. Let's explore the cubical quad antenna, or quad, and see what it really is and how it really works. Are you looking for the best Amateur Base Antennas for sale? Shop all Amateur Base Antennas here today at The Antenna Farm. 1) The magnetic loop antenna is an RF transformer. Most receivers have a UHF noise figure somewhere in the range 3-10 dB, with 5 dB being typical. Previous attempts to create omnis have centered around shortening a half wave dipole and shaping it into a circle or square. What is an Antenna Tuner? • An antenna tuner (coupler is a more correct term) is an impedance matching device which minimizes “mismatch” loss (maximizes power transfer). Oct 12, 2013 · The WB0DGF Antenna Site. If the antenna amplifier has a noise figure below 3 dB then you can assume it is probably quieter than the receiver. VHF/UHF Discone Antenna Ultra wide-band antenna receives 25-1300 MHz. The AOR SA7000 super wide range receiving antenna covers from 30 kHz to 2 GHz. Feb 12, 2018- Low-cost home brew antennas for amateur radio. Put a portable radio near the antenna and turn it on. This month I decided to build a 2 meter 5/4 wave antenna. They indicate the direction of incoming VHF signals on a circular ring of light-emitting diodes or a digital display. As a bonus you can use a similar antenna as a signal pickup on a monitor receiver when testing homebrew transmitters. com and modulatedlight. I have the antenna connected from drain pipe to tuner, MFJ 696,I have a lot of noise on all frequencies. Jan 30, 2012 · Okay, enough of UHF/GMRS antennas. First, I tried something simple. Apr 15, 2010 · The "Speaky" HF SSB transceiver and other homebrew projects UHF Yagi Uda antenna. The directivity achieved by trimmer resistor as terminator, was about 17 dB (at around 85 ohms). I have no test gear for 70cms other than my FT817 and a power meter so I had to check the antenna using these. Unlike the HF bands, most VHF antennas will cover the whole band segment without the need to retune. Cheap Yagi Antennas For VHF/UHF - Repeater Builder Cheap Yagi Antennas for VHF/UHF by Kent Britain, WA5VJB edited by John Maca, AB5SS This was the first antenna I built using the antenna to control the driven element impedance. The higher you can put the antenna, the better the signal will be. I will try to explain in few words how the small magnetic loop antenna works. "EGGBEATER"ANTENNA VHF/UHF ~ PART 1 ON6WG / F5VIF For the enthusiastic listeners or the licensed amateur station wishing to experiment with satellite transmissions without investing a large sum of money in rotators and tracking systems, here is a very competitive antenna. A little while ago (about 6 years to be exact) the best antenna I had for 145MHz was the 1/4-wave mag-mount antenna on the roof of my car. Hf Beam Antenna Homebrew. Rob the elements off the antenna, cut them to length and mount your gamma match to it with a appropriate sized reflector. by Al Peter, AC8GY. The repeater consists of a miniature VHF receiver with sensitivity of -124dBm, having an IF bandwidth of 15 KHz. The maximum forward GAIN is about 8,17 DBi (6 DBd) on 145 MHZ. Visitors Online: Total Today: Updated 21st May 2019 A warm welcome from Richard G6HKS - Some of you may know me, I am a keen all mode VHF and upwards DXer but like many I have a less than perfect radio location – this has obliged me to optimise my station to the best of my ability – to this end I became a fan of Dereks PowAbeam. Run another short coaxial cable – of the same length as the cable in Step 2 – from the VHF antenna (ClearStream 5 shown) to the combiner connector labeled “VHF IN”. The directivity achieved by trimmer resistor as terminator, was about 17 dB (at around 85 ohms). Are you looking for the best Amateur Base Antennas for sale? Shop all Amateur Base Antennas here today at The Antenna Farm. If carefully constructed you should be able to achieve a VSWR below 1. ) This page details several T-match tuners. 40 Comments Unless you are a big time antenna builder, the unit will then sit idle on the shelf (or will wind up on loan to hams even cheaper than. Member of GDXF (25), UKSMG (1055), AGCW (3513) This homepage is dedicated to the homebrewing of equipment, especially for building HF- and VHF-Yagi-antennas. To build the largest and most complete Amateur Radio community site on the Internet. Ideally this serves well as a base antenna, although can be easily used aboad the craft. Notebook showing Small Magnetic Loop antenna results by cutting and testing method. If you are visiting from another site, this is our address http://www. The MFJ-1668 becomes a very efficient portable antenna when used in combination with a tripod and a ground radial system. swr meter is mandatory for every HAM radio, without that u cant homebrew or do antenna installation. May 16, 2012 · This box is laying in the shack for so long that I almost had forgotten it. Handhelds Many of today's handheld radios are Dual Band VHF/UHF. The receive antenna is a 1/4 wave vertical mounted in the top corner of the spacecraft. Adjust for optimum signal strength, and enjoy your homemade HDTV antenna and free HDTV channels. HomeBrew Ur Antenna??-- Visit The AC6V Antenna Homebrew Links. My first true DX contact shortly after installing the Titan DX was FT5ZM, Amsterdam Island. Like all collinear’s it is sensitive to near by objects. radio-astronomy. This antenna normally has about a 3 DB gain over a 1/2 wave center fed dipole. Switch the tuner onto an available AM station and move the plate around until the reception becomes clear. This has a Super Regenerative detector. In this antenna a RG58 cable it was used. Mar 08, 2014 · A Miracle Whip Inspired Antenna Tuner. The Delta Loop is not only a great transmitting antenna but a low noise receiving antenna. Practical Antenna Handbook 5editition Practical VHF/UHF Antennas Cara Praktis buat antena VHF Antennas HF Radio Communications Membuat Antenna Sendiri RF Technical Articles Fortress Guitar - Iman Sutrisno. It doesn’t actually tune the antenna; the older name, “transmatch,” is better. switched between this indoor antenna and a Diamond X-510 vertical on the roof. The disc diameter is about 0. Originally Published in the Central States VHF Society Conference Proceedings, 1994. Arm securely bolts to tower leg with U-bolt and saddle clamps; the saddles are welded to the arms for easy mounting. It is quite common to see a balun in wire antennas of all sizes, production quality, and brand name. Building a basic 162. Amateur Radio Homebrew Projects on the Net This page is dedicated to Amateur Radio Homebrew. Click here to visit our frequently asked questions about HTML5 video. 2 meter High Gain Low Noise Antennas for 144 MHz with Leading G/T for its length. VHF (UHF) strip-line reflectometer A simple 10 W forward and refleted power meter for monitoring 144 MHz transverter TX output power and possbily antenna system's SWR, was build using double-sided fiber-glass PCB and 100 uA panel meter. 1 at lowest point), for ALMOST the FULL BAND on 40 Meters, and under 1. no need to spend alot of time for tuning, i just can do that not more than 5mnt, just place the antenna around 2meter from ground and it will be good for tuning. I have not made much ham gear myself, but I want to start building antennas for fun (2 meters to start). A whopping 11422 miles from my QTH. These work as the counterpoise to make the antenna act more like a dipole rather than a loaded vertical and work amazingly well. A stealth dipole wire antenna tuned for 75 meters band that follow the contour of the home making it almost invisible. Handheld Police Scanner Antenna Good to Knows Some handheld antennas have an adjustable ‘elbow’ that allows the antenna to be vertical or horizontal. Apr 12, 2011 · I am unable to check the SWR properly, as I don't possess a VHF meter, and for some reason the 706's meter shows 1. Excellent suppression of all sidelobes. The one described here is capable of dissipating 100 Watts for short periods of time and provides a low power 50Ω port suitable for connecting a receiver or spectrum analyser for station monitoring. A Stealthy HF Coat Hanger Antenna. Also, the antenna doesn't have to be perfectly straight; it can go around a corner without a problem, just make sure each side of the antenna, measured from the corner, is a multiple of the 5/8th wave length. HOMEMADE ELECTRONICAL CIRCUITS AND ANTENNAS homebrew projects Home made No frames supported page. discomfortheatneasea in chest area. 3 out of 5 stars 56. Many of them are down right ugly. Browse our daily deals for even more savings! Free delivery and free returns on eBay Plus items!. A loop antenna will be resonant (with a purely real impedance) as the perimeter of the loop approaches one wavelength in size. 2P3 AM Radio Receiver Kit - Homebrew DIY for Enthusiasts; - Magnetic antenna - Battery box Yaesu FTM-3200DR 65 Watt 2 Meter VHF C4FM/FM Mobile Sale *$139. It was now time for some testing, I had Joshi kaka to test the antenna with his antenna analyzer. Note that the antenna should be tested before gluing the end caps in place. When properly tuned and aligned the receiver is very sensitive. Marine AIS Antenna Portable Antennas VHF-UHF Log Periodic Antenna VHF-UHF Log Periodic Antenna-North Yagi Antenna. Nathan Miller NW3Z. I was pleasantly surprised to discover that the antenna thingee that I was using (a set of rabbit ears with a small bow-tie UHF unit) is actually giving me more channels with the new TV than I was getting from the old one. Visitors Online: Total Today: Updated 21st May 2019 A warm welcome from Richard G6HKS - Some of you may know me, I am a keen all mode VHF and upwards DXer but like many I have a less than perfect radio location – this has obliged me to optimise my station to the best of my ability – to this end I became a fan of Dereks PowAbeam. Nov 17, 2008 · Hi there I like to build a Homebrew 2m, 70cm mobile antenna with a BNC plug to put onto a magnetic base that has the BNC ready for it. This multiband vertical designs provide 9 band coverage encompassing the 6, 10, 12, 15, 17, 20, 30, 40 and 80 meter bands. Use our simple calculator to determine approximate dimensions of materials needed to build a 3-element Yagi/Uda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications. 6pf, and around a 50% efficiency. no need to spend alot of time for tuning, i just can do that not more than 5mnt, just place the antenna around 2meter from ground and it will be good for tuning. The frequency range of the preamplifier is roughly from 75MHz to. MP1B forms the basic core antenna of the various MP1x series Super Antennas. It does NOT tune the antenna! • Old R. After a few talked he gave us an article about vertical antenna that he took from the internet. Coax Cable Charts With Losses, Power Ratings, etc. Homebrew antenna options include the simple “Tiger Tail” or 1/4 wave (~19” at 2 meters) of wire with a crimp connector to attach under your rubber duck. He and I differ a little about he dimensions of his AMOS antenna. A Tree Friendly 2 Meter Halo Antenna. Jun 30, 2017 · Home Brew Antenna Notes Home Brew Antenna Notes Wally Jukes, K6LDS Assistant Stake ERC Specialist El Dorado California Stake While preparing to “Show and Tell” some of my homebrew amateur radio antenna projects with VHF and UHF. 6pf, and around a 50% efficiency. Setting the Standing Wave Ratio is an important installation procedure, but not one to fret over afterwards. Delta Loop. FYI -- This was (many years ago) for a science fair I entered. If you're into QRP, you've probably heard of the Miracle Antenna. 99 ANT32 UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER Compatible with all Uniden Bearcat base or mobile scanners that use a Motorola type right angle antenna connector that plugs into back of scanner. Public Demonstration: 40m - SSB in the. A Tree Friendly 2 Meter Halo Antenna. In addition, specific models mentioned in the Antennas forum Like diamond dual band mobile antennas,and more are here for future reference. Practical Antenna Handbook 5editition Practical VHF/UHF Antennas Cara Praktis buat antena VHF Antennas HF Radio Communications Membuat Antenna Sendiri RF Technical Articles Fortress Guitar - Iman Sutrisno. This tuner is built on a stainless chassis with stainless front and rear panels. In fact, there's nothing new on this page. The HVU-8 was designed for those suffereing from antenna restrictions in mind. Hidden Antenna Ideas Loops, Operation Away From Home, Attic-- From N0HC Stealth Antenna Experiences - From Clif's ham radio connection. DX Notebook Antenna Pagemany homebrew antenna projects. Feb 23, 2017 · NOTE: Comparative testing of this antenna against one without the "choke" showed that the choke is NOT needed. I' m very happy with this product and recommend it. The frequency range of the preamplifier is roughly from 75MHz to. Building a basic 162. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. It is based on information found in the ARRL Antenna Book which used 3/4" fittings. Run a short coaxial cable from the UHF antenna (Bowtie antenna shown) to the combiner connector labeled “UHF IN”. 3 out of 5 stars 56. Adjust for optimum signal strength, and enjoy your homemade HDTV antenna and free HDTV channels. Jun 30, 2017 · Home Brew Antenna Notes Home Brew Antenna Notes Wally Jukes, K6LDS Assistant Stake ERC Specialist El Dorado California Stake While preparing to “Show and Tell” some of my homebrew amateur radio antenna projects with VHF and UHF. Note that the antenna should be tested before gluing the end caps in place. VHF antennas projects and plans. 1 at lowest point), for ALMOST the FULL BAND on 40 Meters, and under 1. VHF/UHF directional antenna Estimated cost: TBD A common type of antenna that is either horizontally or vertically polarised. Put a portable radio near the antenna and turn it on. Nov 29, 2017 · While it isn’t a homebrew project a Sark-100 antenna analyzer is worth a look. The SWR was 1. We had a lot of fun on the VHF+ bands at WFD 2019 and we are planning to add some more bands for our operation this year. NOTICE: always refresh your browser for each page on this site. 7 dBi gain and 18° Vertical Beamwidth. Homebrew antenna for HDTV I just replaced my vintage CRT TV with an LCD hi-def unit. Pull Twist This stiffens the copper -hardening it. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". As the holder of an Extra Class amateur radio license, I know there is no such thing as a “magic” antenna, but I started referring to this antenna as the magic antenna when I discovered that it had such amazing bandwidth, covering digital channels 2 through 60. A Quad is a balanced antenna, and should be fed in a balanced manner. Line Isolator Tim Ramey on 16th Sep 2018 I had a real issue with RF in the shack, grounding, changing out coax for better coax didn't help. All Bands Vertical Antenna-HF (homebrew) A few months ago my friend 9W2 AYR(Anuar) and I visited my new friend 9M2LR (Mr. Portable antenna systems for HF VHF UHF. It is a high gain VHF antenna, where the gain values are around 8dB or so for RF13. It has a low omnidirectional pattern and is circularly polarized. Latin America Probably doesn’t need listening antenna. 3 out of 5 stars 56. With this our Ground plane antenna for VHF Ham Bands was ready. 7:1 at 146 MHz, indicating that the antenna is a bit long. Visitors Online: Total Today: Updated 21st May 2019 A warm welcome from Richard G6HKS - Some of you may know me, I am a keen all mode VHF and upwards DXer but like many I have a less than perfect radio location – this has obliged me to optimise my station to the best of my ability – to this end I became a fan of Dereks PowAbeam. DX Notebook Antenna Pagemany homebrew antenna projects. Handhelds Many of today's handheld radios are Dual Band VHF/UHF. Pacific Antenna Warranty Policy. Free Online Engineering Calculator to find the Dimensions of a Logarithmic Periodic Dipole Antenna for a given Frequency Range and Length. Requiring a new 2 metre band antenna for local FM simplex and repeater communication and after evaluated a couple of the main contenders for the project I settled on the 5λ/8 wave ground plane to be designed for approximately 146. Rolling Your Own: building antenna splitters that perform better than most commercial units by John Bryant and Bill Bowers. It is optional when the antenna is mounted indoors. (tested with ordinary WiFi router/access point). The Scatter Forager is a low gain antenna. Some don't even work that well. Top 10 Best Fm Antenna Diy. VHF/UHF 2M/70CM Antenna HYS-771N BNC Handheld Radio Antenna for ICOM Radio V8 V80 V80E V82 V85 F3S HT-66. Commercially there is an antenna made by the company Antenna Direct called the C5. I have no test gear for 70cms other than my FT817 and a power meter so I had to check the antenna using these. Nov 30, 2019 · We are continuing to make progress on our preparation for VHF+ Operations at Winter Field Day (WFD) 2020. I love this antenna. ARRL Product Review of the M2 6-Meter HO Loop Antennas. Get it as soon as Mon. 0 Hertz PL tone on the uplink, for on-demand activation. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. 5:1, so some adjustment required. by Joe Moell KØOV. It is a high gain VHF antenna, where the gain values are around 8dB or so for RF13. Simple to construct and suitable for a large number of satellites. The Wheel resembles a skeleton three leaf clover. 10-80 Meter 100W Alpha Loop 100W 10-40M, 20W 40-80. net homebrew topics A selection of various homebrew items. Explore douno2's board "Antennas VHF/UHF Homebrew HAM & TV", followed by 139 people on Pinterest. As discussed above, G/T applies to upper VHF and up antennas but is only just one-size does not fit all when looking at Yagis for VHF and UHF frequencies. By the way, the 2 meter 3 element Quad homebrew version is described here very nicely. Antenna & Tower Mail Lists -- Subscription Info. Find a clear area, free of obstructions. Find many great new & used options and get the best deals for Homebrew Antenna Tuner For Ham Radio at the best online prices at eBay! Free shipping for many products!. On these modules as they ship, that resistor is 3900 Ohms. I have a Rigmaster AA-55 Zoom ($400), a MFJ-259b ($200), and a Sark-100 ($62+$6 for AK4R PC software). Notebook showing Small Magnetic Loop antenna results by cutting and testing method. Due to material, I decided on a 5 element Yagi built for VHF since all I would have to buy is more 3/8″ round stock. I was pleasantly surprised to discover that the antenna thingee that I was using (a set of rabbit ears with a small bow-tie UHF unit) is actually giving me more channels with the new TV than I was getting from the old one. 17 wavelength at the lowest desired operational frequency and the cone has a length of 0. 10-80 Meter 100W Alpha Loop 100W 10-40M, 20W 40-80. Tune up and Operation. Amateur Radio Homebrew Projects on the Net This page is dedicated to Amateur Radio Homebrew. coaxial cable dipole collinear. Only the center conductor of the coaxial cable is connected to the left boom by means of a rivet. In fact, there's nothing new on this page. VENTENNA-- A VHF/UHF vent pipe antenna Ventanna HFP-2 10 Foot HF Antenna-- 6. The frequency range of the preamplifier is roughly from 75MHz to. Homebrew VHF/UHF Ground Plane Antenna Not to Scale 20 ¼” Radial 6 ¾” Radial Attach each radial with a 6-32 screw, lockwasher and nut 20 ¼” Radial 6 ¾” Radial Slowly twist the wire while pulling it to keep it taught. On hf the size and element diameters are usually a drawback. switched between this indoor antenna and a Diamond X-510 vertical on the roof. The antenna is broad-banded and should therefore provide a low SWR across the entire 2-meter band. But, rather than getting deeper into a technical discussion, let's just try to avoid problems before they cause trouble. To the right is my recently revised homebrew transceiver, the HBR-2018 It is a 160 to 6 meter CW/SSB & Digital Hi-Performance QRP transceiver. Get it as soon as Mon. VHF/UHF directional antenna Estimated cost: TBD A common type of antenna that is either horizontally or vertically polarised. Both have just a 6 foot wire for an antenna. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. Introduction. Homebrew or restore one. Unusual Look to Usual Things. 20M seemed the 20M, Antenna , Balun For homebrew vertical VHF antennas, Homebrew Coaxial Dipole for VHF or UHF Here’s a base station antenna you can easily build for 146, 220 or 440 MHz. Digital Antenna's 8' VHF antennas combine 6 dB gain, ruggedness and a pristine finish for the most superior antenna available. ost commercial 2-meter repeater antennas with gain fall into two categories:. VHF/UHF Beam Antennas. Whatever avenue you take, you need to bone up on antenna design. e-mail-adress: dk7zb(at)darc. The RF power wave reshaping help taking some of the RF power emitting vertically to the horizontal radiation. An antenna Analyzer provides functions for checking and adjusting antennas and coaxial feeding lines. See article here. Jun 22, 2009 · I want to build a homebrew UHF TV antenna. Only the center conductor of the coaxial cable is connected to the left boom by means of a rivet. Aug 28, 2015 · Several members of the Nashua Area Radio Club recently got together to help one of our members, Ralph N1UH, put up a 40m Delta Loop antenna. Multiple ground loops around various pieces of equipment can cause all sorts of problems. The Super Antenna MP1 is a Ham Radio HF Portable Antenna that also covers VHF-UHF. 6pf, and around a 50% efficiency. In this antenna a RG58 cable it was used. Homebrew G5RV All Bander The G5RV is an easy-to-build 80-10 dipole requiring no traps. 31 Comments figured building and using a cheap and portable 2 meter band VHF Yagi style beam antenna would be the It’s one of the best-known homebrew. Here, you'll find links for mobile antennas covering vhf-uhf. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. Rolling Your Own: building antenna splitters that perform better than most commercial units by John Bryant and Bill Bowers. It can be built for around $15-20 (1999 dollars). rar (470kb) L/2 antenna ; JPOL antenna for packet radio 6/9 element VHF YAGI; 9 element YAGI antenna for 2m band; 75m antenna tuner; 16 element YAGI for 20m and 70cm. Built to withstand high speeds and harsh weather, these antennas are ideal for radar arches and T-tops on speedboats, yachts and commercial vessels. Besides that the vertical is placed between buildings which is not really good for this kind of antenna. This is the most convenient place to set up the antenna within reach of the radio inside allowing for the 50ft run of coax. Are you looking for the best Amateur Base Antennas for sale? Shop all Amateur Base Antennas here today at The Antenna Farm. It is formed based on BF180 UHF Transistor. I tried a got comet base antenna, up about 15 feet or so, but performance wasn't much difference. vhf - uhf band plan chat j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. This antenna does not need a ground plain but one can be added if you want to. Use our simple calculator to determine approximate dimensions of materials needed to build a 3-element Yagi/Uda antenna, and then shop for your needs on our other pages and select from our inventory of aluminum, fiberglass, coax, connectors, and other parts and accessories for amateur radio and other radio applications. In this box I have a homebrew remote antenna switch. My Homebrew 3 Elements 20m Monoband Yagi After used GRRV for all bands especially on 20m, I decided to build my own 20m yagi because I always monitor Indonesian stations got pile up on 20m while using beam antena. enclosed collinear If the antenna is to be used outdoors, the end caps should be glued on with appropriate conduit glue, to ensure a weather-proof seal. swr meter is mandatory for every HAM radio, without that u cant homebrew or do antenna installation. (1) The Rockwell Collins KWM380 (One of the finest transceivers ever built). The ‘J-Pole’ Antenna consists of a half wave vertical radiator and an adjacent quarter wave tuning stub which forms the classic ‘J Shape’. Loop antenna usual delta configuration, operating-position control box, termination box with remotely-controlled ground resistance, inverted delta configuration: Loop antenna A loop antenna is an antenna primarily for the AM broadcast and the Longwave bands. 1 shows a 3 elements VHF Yagi "homebrew" antenna designed with YAGIMAX 3. My Homebrew 3 Elements 20m Monoband Yagi After used GRRV for all bands especially on 20m, I decided to build my own 20m yagi because I always monitor Indonesian stations got pile up on 20m while using beam antena. HAM Antenna Plans and Projects - Plans, pictures, parts lists for HF, VHF, UHF. Antenna Software -- Visit The AC6V Antenna Software Links. FYI -- This was (many years ago) for a science fair I entered. It is optional when the antenna is mounted indoors. Portable antenna systems for HF VHF UHF. It exhibits 1. 1 - 18 3/16" length of number 12 wire. Out back there is a 25' mast made of Radio Shack TV mast sections velcroed to an 8' 4x4 that used to support one of those tethered-baseball batting practice toys. Aug 20, 2014 · As a test I also tried it on VHF and found it was a reasonably effective little antenna for airband and 2m signals. This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. DL4MEA, Guenter Koellner - Homebrew projects, especially VHF/UHF. Random Wire Antenna Lengths. Big signal in a small package. To the right is my recently revised homebrew transceiver, the HBR-2018 It is a 160 to 6 meter CW/SSB & Digital Hi-Performance QRP transceiver. Now it’s time to step it up (just a little bit) and fabricate a bigger antenna. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. J- Antenna for 160, 15 and 10 (FM) Meters. hamradio-shop. It's sometimes possible to simultaneously see and hear individual CW signals. homebrew collinear j pole for dual band vhf uhf antennas. As these two bands are used simultaneously, an interference problem can appear on the UHF receiver. Tower Talk Mail List Reflector -- Subscription Info. The antenna appears to be a type of center-fed collinear but does not require any sort of matching hardware when fed with 50 ohm coax. The Central States VHF Society has conducted Antenna Gain Measurements since its inception in 1967. 99 ANT32 UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER Compatible with all Uniden Bearcat base or mobile scanners that use a Motorola type right angle antenna connector that plugs into back of scanner. See more ideas about Ham radio antenna, Ham radio and Ham. Useful instrument for antenna, filter, power amplifier experiments. Unlike the compact internal antenna on a USB modem or cell phone, a Yagi's driven element is large enough to be fully sensitive to the frequencies of interest. All you need to do is enter the desired resonant (center) frequency in the form below, then click "Calculate". I decided to experiment with Magnetic Loops. Due to high impedance feed point; the antenna is less height dependent. Since an old 5 element version (v1) of my antenna was shown in the July 2011 edition of RadCom, a few people have contacted me asking for some information on how it was constructed. Using the software at the bottom of this page, I worked out that a 36cm length of wire, will need a capacitance of around 3. Requiring a new 2 metre band antenna for local FM simplex and repeater communication and after evaluated a couple of the main contenders for the project I settled on the 5λ/8 wave ground plane to be designed for approximately 146. 5 to 30 MHz. Emergency power for your mobile radio (gel- cell battery) The dry cell battery pack and 2 extra sets of batteries for your HT. An ohm meter shows a good connection of the coupling 6′ next drain pipe is about 12′, giving me a total of. There I have mounted a stainless steel box. Jul 15, 2019 · Thank you. See more ideas about Ham radio antenna, Ham radio and Home brewing. It is a high gain VHF antenna, where the gain values are around 8dB or so for RF13. 17 wavelength at the lowest desired operational frequency and the cone has a length of 0. The Yagi-Uda antenna is probably the most commonly recognized directional antenna in existence today. Martin Steyer, Die Aue 2, D-37269 Eschwege-Germany. It exhibits 1. Tower Talk Mail List Reflector -- Subscription Info. Prototype # 1 was a "Dual Band" (40 -20 Meter) Parallel Dipole Antenna, each Dipole is a "Cage Dipole" SWR was BELOW 2. Feb 12, 2018- Low-cost home brew antennas for amateur radio. Jan 30, 2012 · Okay, enough of UHF/GMRS antennas. But if you’re the crafty type and enjoy a good challenge, you may want to homebrew your own antenna. ” — tigers58. vhf - uhf band plan chat j-pole antenna super j-pole antenna cubic quad antenna arrow antennas dual band j-pole note: this antenna was disigned by arrow antennas and it works great. Delta Loop. Buy Digital and Print Copies of Practical Wireless - January 2020. Make sure to poke a few small holes or notches in the spacer to allow the end of the antenna to breathe. Excellent suppression of all sidelobes. Another type of Twin Lead Dipole you can use is to leave the antenna at 300 ohms, and match it to a transmission line (like 50 ohm, RG-8 coax), with a 4:1 balun. However since I use aircell7 and loss is not that much on 5MHz. how to build a wireless collinear antenna. Wire versions are usually the answer. Homebrew Projects at W4OP W4OP Home Brew Projects - MFJ 9406 on Steroids. 99 ANT32 UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER UNIDEN BEARCAT MOTOROLA TELESCOPIC SCANNER ANTENNA PLUGS INTO BACK OF SCANNER Compatible with all Uniden Bearcat base or mobile scanners that use a Motorola type right angle antenna connector that plugs into back of scanner. In resume, A working VHF antenna, really far away from a 17 element yagi, but a very capable antenna. As the holder of an Extra Class amateur radio license, I know there is no such thing as a “magic” antenna, but I started referring to this antenna as the magic antenna when I discovered that it had such amazing bandwidth, covering digital channels 2 through 60. BUILD YOUR YAGI ANTENNA. A remarkable method for increasing the VSWR bandwidth of Yagi antennas as well as allowing a direct dipole feed was recently discovered by Jim Breakall, WA3FET. 7dB of gain*. Jan 08, 2018 · My rig this time was the Yaesu FT-817 and the antenna was a homebrew 6m dipole, strung up as a sloper. A 145MHz 2m loop. The gadget makes playing with various designs a little easier. The feed coax is routed through the inside of the right boom. Resources listed under Antenna Homebrew category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. Another type of Twin Lead Dipole you can use is to leave the antenna at 300 ohms, and match it to a transmission line (like 50 ohm, RG-8 coax), with a 4:1 balun. The larger the wire, the wider the bandwidth. Many RASON members truly enjoyed last month's collinear antenna. Much like a butterfly net, the larger the net, the more butterflies you catch. Reflectors less than 34" wide don't work well for all the VHF-hi channels 7-13 but work fine for UHF. It's a particularly good antenna for people with limited space. THE (VHF) DIPOLE ANTENNA At VHF and UHF, most antenna systems are derived from the dipole or its complement, the slot antenna. Free Online Engineering Calculator to find the Dimensions of a Logarithmic Periodic Dipole Antenna for a given Frequency Range and Length. Like all collinear’s it is sensitive to near by objects.