2m 70cm Base Antenna Homebrew

2-section pole is 8 ft. o Homebrew. Another 9 Element VHF Yagi Design. Sold by Hamcity com and ships from Amazon Fulfillment. Vince (KD2TMJ) and Jeff (AC1FX) prepare to attach the 2m antenna. Crossbanding works most excellent. 5 metres of ladder line as the main antenna that can roll up neatly in a coil and can be used hanging from a curtain rail above a window, dropped down from a tree, or taped to the side of a fishing pole and raised. SWR was good straight from the calculator, about 1. 50 mm RG402 extension to prevent capacitive reactance between the PCB antenna and the transverter metal case. CHA-250B The Comet CHA-250B is a newly designed broadband vertical requiring NO GROUND RADIALS. There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. 2dB 70cm: 8. In a short vertical antenna the Earth current = Antenna current. Of course, to use the same thing for 70cm, or any other frequency over 2m, all I have to do is screw on another piece of tubing. An antenna tuner is required for this antenna to properly function. which gives the amateur the capability of utilizing several radio bands with only one feed line. 70cm Vertical Antenna. Homiebrew Base Loaded Mobile HF Antenna 6 thru 80 meters. (by K0BET) Copper Cactus J pole 2 metter 70 Cm dualband; Homebrew a j-pole 2mt and 70 cm antenna project. diamond x-30n 2m 70cm dual band amateur base antenna universal. Antenna: Twinlead J-Pole antenna - homebrew Diamond Super Gainer 2m/70cm dual band mobile whip antenna, SG7500 complete with trunk lip mount and coax - there is a small cosmetic bend at the top of the antenna. Regardless, my Yaesu 8900 handles 70cm, 2m, 6m and 10m. 45MHz and a perfect match to 50Ω coaxial. Model number: CR8900A. 95: Enhance your purchase Customers who viewed this item also viewed. No duplexer needed. 2M/440 MHz Dual Band Copper J-Pole From N7QVC 2 Meter Antennas A Bunch -- From 6M. 9kg this model is made of fiberglass construction, pre-tuned and fully weatherproofed. Portune, W6NBC here made from a threaded table lamp tube, the lower part of the whip becomes the cen -. comparing 2 meter J-pole on fundamental and on third harmonic frequency (70 cm), with the antenna mounted 8 feet above ground. For a typical dual-band "base" VHF/UHF antenna designed for exterior mounting on a structure or mast you can expect to pay from $35 to $300, depending on quality, durability, and performance factors such as gain. NR124N, NR124NMO 1. Regular price. go into a BNC, PL259 etc etc. Here i present all steps to build this antenna. For shortwave listening I use an Icom IC-R6 and RTL-SDR 820T2 with a Magnum 2000 mobile antenna. 10-160M EFHW Sr $219. Leave the red fly lead loose for the moment. I have previously been using a folded ½ λ dipole made out of 450Ω balanced feeder, suspended in the loft, which is not ideal. The recent increase in larger antennas for this band, along with the growth of interest in 6m EME, has resulted in many requests for such a 6m antenna comparison table, too. ME270 Dual band 2m/70cm base colinear 2m/70cm base station colinear 3. LEO Satellite Antenna - 3 Elements for 2 Meters crossed with 7 Elements for 70 cm. So I designed my own pseudo-J antenna with a parasitic element that helps. 3 Element Per Band Beam/Yagi Base Antenna. 95 Until 06/30/21. The base impedance of this antenna was typically 17 ohms on 28 MHz resulting in an indicated SWR of around 3:1 at resonance. The sealed feed block provides weather protection with minimum wind drag. Comparing 2m Homebrew Antennas. I dove into a mobile / base unit without thinking it through all the way. I could not measure the 70cm response due to limitations of the antenna analyzer. But these are more expensive models. Horizontal Loop Antenna Experiments. It requires no radials, is. The parts included are a length of RG 179 75 ohm teflon coaxial cable and the non. 145MHz x 3 = 435MHz - that's 2M to 70cm or VHF to UHF] The modification involves placing a coax phasing sleeve of aluminium foil around the outside. Homiebrew Base Loaded Mobile HF Antenna 6 thru 80 meters. Three Easy DIY Antennas for Beginners. Also, this design is for two 5/8-wave antennas (hence the name two-element) that are in phase with each other, so they're connected by a phasing stub. Solar Energy Solar Power Ham Radio Antenna Survival Shelter Good Communication Energy Technology Electrical Engineering Emergency Preparedness Summary. Common conne. 11b/g wireless networking. In layman’s terms, this takes care of the SWR of your antenna system so that you can use an antenna on one or more bands. Cubex Quad Antennas. This guy performs WAAAAAAY better than the Comet GP-15, Comet CX-333, and Diamond X200A. Includes bracket and three 20. the 2m dipole is close to 3/2WL resonant on 70cm and therefore takes some power away from the 70cm dipole. Premium quality anttennas for two bands. It is used between the transmission line of an HF antenna system and a transceiver or transmitter. 45MHz and a perfect match to 50Ω coaxial. Anyway, after a demonstration on 2m and 70cm last week - I am keen to get myself a 2m/70cm handheld to listen on and eventually access local repeaters etc. 95: ICOM IC2730A 2m/70cm Mobile $249. 2 Element Quad Antenna. is a blend of technical expertise and common sense approach to accommodating your needs. Mast mounts (1 3/8, 1 3/4 and 2" diameters available) Vertical Flat mount. You probably noticed that there's a stick protruding from the bottom of the PVC support. Dualband 2m/70cm Base Antenna Learn More. just make sure you are horizontally polarised. The DIY antenna manufacturing has two advantages: you can build a cheap antenna, exactly with the parameters you need. This ANTGAIN dual-band antenna covers a super wide frequency range of 140-162/435-467 MHz (less than 2:1 SWR) with 3 dB gain on VHF and 5. Another Windom Balun. I can put one up fairly high on the roof of my house, but the base antennas are quite expensive, starting at around £80. It’s also a great antenna for emergency communication and can be fabricated and launched in a matter of minutes. HTEK Dual-Band 2m/70cm Yagi. 2 Cobra 142GTL's CB radios (1 for AM, 1 for SSB) Pace SideTalk 1000B CB. Three Simple Home Brew 2-Meter Antennas. 2 Meter and 70 cm. Satellite Yagi 2m 70cm Tape Measure Antenna Homebrew - First Built a Yagi 2m 70cm Tape Measure Antenna for amateur radio satellites but this video shows me having a QSO of a repeater about 20-30 miles away. This is Part 1 of my evaluation of this antenna where I check Return Loss on both bands. 2m 70cm Dual Band Antenna 144 432 Mhz Yagi. Frequency Range (MHz) - 144-148/420-450. The DIY antenna manufacturing has two advantages: you can build a cheap antenna, exactly with the parameters you need. Disadvantages. NOAM, or FAX: (204) 275-0261, or eMail: [email protected] MFJ Enterprises Inc,Ameritron,Hy-Gain,Hygain,Cushcraft,Vectronics,Mirage,MFJ,MFJ Enterprises,Antenna,Radio,Ham Radio,Amateur Radio,Tuner,Analyzer,Starkville,Amplifier. Europe's leading Supplier and Distributor of Communications Equipment. Blackbird VHF/UHF JPOLE Base Antenna 2M/70CM 143-149 MHz + 437-450 MHz. The trimmer is used to resonate out the inductance of the length of. The first one is modified to be a 2m/70cm dual band and the other one is 2m mono-band as per design as described. The SWR is 1. ADD TO BASKET. WBØTGE's Mighty Woof 2m/440 Fan Dipole. We have over 32 years of experience designing and building antennas and systems to satisfy the ever expending communications needs. AWX for 2m and 70cm. ON6MU: UHF 4/6/10 Element Yagi Antenna for 70-cm. Model # Band Stacked Element Phasing/ Wavelength Gain/dB Watts Connector Type Weight Lbs. Ian G3SEK - Tuesday, July 31, 2001 at 21:34:55 (GMT/BST). Antennas Yagi (UHF) Yagi (VHF) Success Rate. I don't believe an antenna tuned for 2m will load up very well on 70cm. The design is based on an article which originally appeared in CQ magazine (1987), and a version of this design is produced by Arrow Antennas of the USA (not. Tram 1480 DualBand 144-148/440-450 MHz (2M/70cm) Base Repeater Antenna 6/8 Dbi. 2 Cobra 142GTL's CB radios (1 for AM, 1 for SSB) Pace SideTalk 1000B CB. I'm thinking about getting a tri band antenna to use for receiving VHF and UHF as they are quite often said to be a good compromise for general scanning. Unless you need very high gain the antennas are small. 2m 70cm collinear antenna 2m 70cm collinear antenna. The feedpoint impedance of the 2m rectangular loop is 50 ohms thus avoiding the need for a 1/4 wave impedance transformer. Any suggestions on an easy antenna to buy and reasonable base radio (mobile is cool). Getting Started: First look at my drawing below, and decide how long an antenna you want to have up, approximately. Figure 3 — The original DBJ-1 dual-band J-pole. 20m/2m/440 20m, 2m and 440 MHz Antenna. Mast mounts (1 3/8, 1 3/4 and 2" diameters available) Vertical Flat mount. 2:1 at center frequency and 1. <- primary home antenna as of 2020. Note size of tube and turns on choke altered to uk tube size Someone asked me how much power the Flowerpot will take. Common conne. 4 acros s the 2M ham band. 3 elemente 2 Meters and 5 elements UHF. It works the 6 meter, 2 meter and 70 centimeter bands. HF CL series 6M & HF Monoband Antennas. Share - Ground Plane Base Antenna 2 Meter 70cm Dual Band HDuty Amateur Radio Ham Scanner. Motarolla Talkabout FRS HT's. I was surprised that I could further reduce my desense by pointing my disconnected 2m/70cm beams at a right angle to my Lindenblads. HYS YAGI Antenna High Gain 9dBi UHF 70cm Base Antenna UHF 400-470 MHz 5 Elements Antenna For Motorola Kenwood Baofeng 2-way Radio. Hawkins-Radio Thunderbolt SSD 58+ 4M 70 MHz antenna portatile radio amatoriale. 70cm is a good band for experimenting with antennas. Blackbird VHF/UHF JPOLE Tactical Base Antenna 2M/70CM - Main. We have over 32 years of experience designing and building antennas and systems to satisfy the ever expending communications needs. 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. K3CDY Ham Member QRZ Page. The diamond x-50 antenna 2m/70cm fixed station vertical, * frequency bands 2m/70cm * gain 4/7. 2 across the entire 2M band. D5 WILKINSON POWER COMBINER DIVIDER HOMEBREW VHF UHF HAM 2M 144MHZ 70CM 432MHZ. 2 Element Quad Antenna. 00 FT840 Our Price £779 Save £100 B-10 2M 70CM Mobile Whip £18. Icom IC-910 transceiver; M1BXF Homebrew 1. This suggestion is a flop. NR73BNMO 2M/440 Antenna. I received a 'freebie' Diamond X-30 2m 70cm Base Station omnidirectional vertical antenna from a local ham. Drawing of the 70cm bicycle antenna, showing the construction and sizes. a Mosley tri band HF. Performance is equal to a J-pole, but it's smaller, less obtrusive and more weatherproof. This is designed for stationary use. The J-pole antenna is an end-fed omnidirectional half-wave antenna that is matched to the feedline by a quarter wave parallel transmission line stub (Lecher line). To do the antenna takes a half of hour and to tune the antenna also takes a half of hour. Harvest X-5000 144/440/1200MHz (2m/70cm/23cm) Tri-Band Base Antenna. There are some quad band mobile antennas that will allow me to use those bands in my vehicle (where I can legally operate), but I don't seem to find one antenna that can do all four as a base antenna. LEO Satellite Antenna - 3 Elements for 2 Meters crossed with 7 Elements for 70 cm. Simple and easy to make using parts from an old TV antenna. Not counting the rubber ducky that came with my first VHF radio a BaoFeng UV-5B, I made my first three antennas. 0 mHz (2m), 420. I am planning to convert one of my Baofeng HT radios to a 2m & 70cm base station. Mast mounts (1 3/8, 1 3/4 and 2" diameters available) Vertical Flat mount. Homebrew 70cm (430 MHz) antennas. 7MHz, nearly bang centre of the 70cm satellite allocation (435. 2db * power 200w * type 6/8, 3x5/8 * length 1. Coordinates -16. Low resistance grounding at the antenna base is essential for optimising performance as well as minimising noise and RFI. 70cm Ruslan Yagi. Apr 2, 2018 - Homebrew Multiband Vertical HF Antenna Pin My Homebrew Vertical Multiband Hf Antenna On3jt on Pinterest 450 x 600 · 80 kB · jpeg 40 Meter Vertical Antenna Homebrew multi band ham radio. DC ground structure, which escapes high voltage caused by lightning, protects your radio and equipment. 11 Element Beam/Yagi Base Antenna. Once you are satisfied with the results, the P L-259 can be cemented to the insulator. com: 2m 70cm base antenna. Europe's leading Supplier and Distributor of Communications Equipment. 2dBi 5/8 wave x2 70cm: 8. Next cut a section of 1” pipe long enough to mount the antenna where you want and push it into the bottom of the 3/4″ X 1″ tee. Dipole Antenna Calculator. ) DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. The ANTGAIN has an overall length of 39 inches with a handy antenna fold over feature and is rated at 140 watts maximum power. The Miniscan is a wideband receiving antenna in the range of 100-1200 MHz and also transmits on 2m & 70cm bands. I can put one up fairly high on the roof of my house, but the base antennas are quite expensive, starting at around £80. Polarization - Can be Mounted Vertical or Horizontal. This model is made of fiberglass construction, pre-tuned, and fully weatherproofed. Total height 5ft 8 inches. Most testing was done simplex; but, some testing was done using repeaters. e-mail [email protected] Good to see you at the hamfest and HamJam this year. SWR: 1:5:1 nominal. Frequency Range (MHz) - 144-148/420-450. 146/437- 10W BP Split boom with duplexer. Homiebrew Base Loaded Mobile HF Antenna 6 thru 80 meters. Cushcraft 17B2. Horizontal Loop Antenna Experiments. SWR was good straight from the calculator, about 1. The “Big Wheel” is a horizontal polarized omni directional antenna. Polarization - Can be Mounted Vertical or Horizontal. Find this Pin and more on ham radio by Jim Young. Connector: PL-259. The antenna can be mounted by passing the feed line through a mast of 3/4-inch ID plastic or aluminum tub-ing. How a Dipole Antenna Works; How a simple counterpoise can lower your SWR. The Wire Size can range from 16 AWG to 12 AWG. 2 Meter Antennas. A Choke Balun for 160M to 10M. The diamond x-50 antenna 2m/70cm fixed station vertical, * frequency bands 2m/70cm * gain 4/7. There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. Saved by Everything's Experimental. DIAMOND CP62. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. Enter the desired frequency. Wide band base antenna By Guest. (1) Tecsun S-2000 (1) The Homebrew 6DJ8 Single Tube Headphone Project. Unless you need very high gain the antennas are small. M3FVB 3 element 2-meter Yagi-- From The ARRL 5 element 2-meter Yagi-- From The ARRL 2M 9 Element Yagi 5/8-WAVE COLINEAR "OUTSIDE PVC" 2-METER 146 MHz FM J-POLE Via KB1DIG & KB1GTR. Calculator. Figure 3 — The original DBJ-1 dual-band J-pole. (by K0BET) Copper Cactus J pole 2 metter 70 Cm dualband; Homebrew a j-pole 2mt and 70 cm antenna project. 0 dBi Max Power: 100W, Color: Black This antenna is compatible with Kenw. You can shorten your vertical antenna by using a loading coil. This makes it much easier to operate on modern multiband transceivers like the Yaesu FT-817ND. • 2 1/4 inch x 48 inch Steel rods (I know they'll rust, it's just temporary to get it to work, I'll get aluminum later) I don't have any coaxial cable (don't know the best type to get) and don't know how to match the impedance of the cable to the antenna. Simplified and improved design from that published in the July 2002 QST. There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. Frequency in MHz: Length of the vertical element: -. Today, I’m going to show you how you can easily build a homebrew 2 Meter ¼ Wave vertical antenna for under $10. Both of the bands, 2m and 70cm, can be operated simultaneously by using optional antenna duplexer. How to build a 2 meter yagi antenna with a gamma match. 89: ANYTONE AT778UV 2m/70cm Dual Band Mobile $129: TYT TH8600 25 Watt 2m/70cm Mobile $129. 2m-70cm Antennas. I proceeded to make a very heavy dipole from copper pipe, akin to the type used for J-poles. Any suggestions on an easy antenna to buy and reasonable base radio (mobile is cool). Linear Amp UK Hunter 1000 HF Linear Valve Amplifier. It is made from 10' of 1/2" copper tubing, a couple of fittings, a coax connector, and a piece of 14 gauge copper wire. The 40M, 15M and 10M coils come with the antenna and are installed in the photo to the left. This dipole was constructed as follows. It looks like the x200 is shorter (8. 70cm Ruslan Yagi. This is Part 1 of my evaluation of this antenna where I check Return Loss on both bands. ) capacitively shielded loop antenna that I developed for two meters. 2(b): But when erected as an inverted-V you gain a couple of S-points (10 - 12dB) in the. This is our latest antenna featuring coverage in a single antenna - 2 meters, 220MHz, and 70cm. Mounting the 20 metre delta loop. You also have the option to narrow your search by antenna type, connector or mount. send to a friend. Install 2m antenna. 5 from 144-148 Mhz @ 75 ohm SWR less than 2. Luckily, we're close enough that I can still have reliable contacts with him using a home brew 2 meter Moxon Antenna. just make sure you are horizontally polarised. My main shack location has a commercial 2M J-Pole Dual band mounted on a short mast. Model number: CR8900A. Homebrew 70cm Quad Antenna Pa1ca. SWR Sensor (from 2010 ARRL Antenna Handbook) At 100 watts, IFWDOUT (into a short) > 6 mA At 100 watts, VFWDOUT (into an open) > 2. The PORTABLE or 'BASE' 2m/70cm Copper Pipe J Antenna by N6JSX 2 Meter Slim Jim Copper Tubing Antenna by I build these all the time and I use one now and then What's the difference between a J-Pole and a Slim Jim antenna? Image result for Homebrew Nvis Antenna 2 Meter Slim Jim Antenna | KB9VBR J-Pole Antennas I've constructed a 144/440 Dual band. Assembly was straightforward. Get the best deal for VHF Ham & Amateur Radio Antennas for Base Station from the largest online selection at eBay. is a blend of technical expertise and common sense approach to accommodating your needs. 11 el dual band CROSS YAGI for 2m and 70cm (144-146 and 430-440 MHz). Total height 5ft 8 inches. 5 to 1 with the best point is under 1. So I designed my own pseudo-J antenna with a parasitic element that helps. Getting Started: First look at my drawing below, and decide how long an antenna you want to have up, approximately. 5cm was cut from the driven element and 1cm from all radials. Remote homebrew PA - LNA units on 144, 222, 432, 902, and 1296 MHz are located neat the antennas. Whether you're operating on 2 meters or you work in the 1. ) capacitively shielded loop antenna that I developed for two meters. Triband Vertical Base / Repeater Antenna Product Specifications: Coverage: 6M/2M/70cm Gain: 6M: 2. Verkäufer: sigma-4-antennas ️ (21. 0 dBi/2m & 8. Tighten bolts on 70cm. VY1YU Yuuri, 2m J-pole. I received a 'freebie' Diamond X-30 2m 70cm Base Station omnidirectional vertical antenna from a local ham. Antennas Yagi (UHF) Yagi (VHF) Success Rate. The NMO2/70SH from Pulse Larsen is a 19 inch tall, dual band antenna for 2m and 70 cm amateur / HAM radios. ARRL 5828LOW POWER COMMUNICATIONS 4th EDITION. HF CL series 6M & HF Monoband Antennas. ML&S Martin Lynch & Sons Ltd. Next cut a section of 1” pipe long enough to mount the antenna where you want and push it into the bottom of the 3/4″ X 1″ tee. Homebrew satellite antenna. Everyone else is making antennas that look like a porcupine that chewed on an electrical cord: Wires and tophats and junk on the side and knob capacitors and counterpoises and shiny metal radials sticking out all over, and 10 feet (3 meters) long just to get 6dBi gain. Here i present all steps to build this antenna. The 2 Meter Coffee Can Antenna The 2 meter coffee can antenna is easy to make and you'll have loads of fun making contacts with it! The coffee can antenna is actually a sleeve dipole antenna made using a large coffee can, or other similar size tin can, in place of using radials like that of a ground plane antenna or the other half of a dipole element. (7) 7 product ratings - Tram 1481 Dual Band 2M/70cm 144-148 & 440-450 MHz Base/Repeater Antenna 17'. The PVC end caps are hand tightened. The original Ed Fong Dual Band VHF/UHF 70cm/2m J-Pole PVC Pipe Antenna : Eye. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. On holiday's I use a HyEndFed 21. The home-brew 2M cavity in this book demonstrates one of the easiest way to construct very-workable cavities in the home workshop. Specifications FREQUENCY: 144-148. In addition, specific models mentioned in the antennas forum like diamond antennas and more are here for future reference. A high-performance stealth VHF/UHF antenna you can build yourself. Radio Shack Power Supplies. To use the calculator, enter the desired operating frequency in megahertz to get a starting length in both feet and meters for building a quarter-wave vertical antenna. The 40M, 15M and 10M coils come with the antenna and are installed in the photo to the left. DIAMOND CP62. If you decide to make a 2m antenna, you’ll end up with 1. Set up the tripod and mast with only bottom two sections telescoped out. I also worked several satellites. 2m 70cm 23cm antenna. And here is a link to its. FINAL LEGAL STATEMENT I have released the antenna into the public domain. 5 Connector: UHF female Element Phasing: 1-1/2l, 2-5/8l The Tram Dual Band Mag Mount is the ideal choice for a simple, high performance mag mount antenna. These antennas are welded, so they are strong, have low resistance between parts Dual Band Base Station VHF/UHF J- Pole HAM Antenna Review. Yaesu FT-9800R (10m/6m/2m/70cm mobile, used as base) Yaesu FT1D (2m/70cm handheld) My antennas. COMPACtenna. WILKINSON POWER COMBINER DIVIDER KIT HOMEBREW VHF UHF HAM 2M 144MHZ 70CM 432MHZ. Voltage Balun. The design is based on an article which originally appeared in CQ magazine (1987), and a version of this design is produced by Arrow Antennas of the USA (not. Accepts mast diameters from 1. 2 Meter 80W All Mode Amplifier 1 KW 2M LDMOS Amplifier 1 KW 222 MHz LDMOS Amplifier 500w 70cm Amplifier 1KW 70cm LDMOS Amplifier A Big Power Supply for SSPAs Low Pass Filter/Dual Directional Detector Sampling RF Power LED Bar Graph Meter Amplifier Control Board LNAs (preamps) and MMICs LNA Sequencing and Protection Building UHF Antennas VHF. 2m/70cm Uhf / Vhf 144/430MHz Mikro Minarett Ham Funkgerät Antenne. As I'm in rented accommodation, installing a full-scale scaffold pole with lots of antennae dotted around the garden is a bit of a no-no, not to mention SWMBO wouldn't be impressed, so I'm now relegated to using a Yaesu VX-170 Handie in the car with a nice commercial 2M whip on the back - My Dual band 2M/70cm Yaesu FT8500 decided to die on me. 5" and the 4 radials are 20" each. Are those Baofengs actually any good? Are the Wouxuns better for triple the price? Do the Yaesu £120 jobbies wipe the floor with them? I like the look of this:. Attic Amsat Antenna Working The Ham Radio Satellites With A Rotatable Puter Controlled Yagi K3rrr Kilo Three Triple R Station. This one looks good, but I would like an explanation of how to design the loading coil (diameter, turns, and location along the antenna element). In fact, all that needs to be done for 435MHz is to leave the antenna in place. 00 FT900AT Our Price £1359 Save £140 Z4 2m70cm M whip wlockino collar £33. 2m : 9-elm LFA G0KSC + ssb preamp. The Magloop Antenna Calculator, VHQ HEX BEAM Antennas, VHF Bi-Square Beam Antenna, 50 MHz CLC antenna , Display Transplant into an Icom IC-756, ZCZ Cluster, A 222 MHz Transverter, - Advertisement - LATEST ARTICLES. Would like to setup a small base station on my desk (I have a 3amp Tripp-Lite PS on a shelf) with an inside the attic antenna. This item Comet SBB-5NMO 2M/70cm Dual Band Mobile Antenna Diamond Original NR770HB 144/440 MHz Dual-Band Mobile Antenna, Black, Gain: 3. 70cm is a good band for experimenting with antennas. The three 2 meter elements can be rotated for more compact storage. Harvest X-5000 144/440/1200MHz (2m/70cm/23cm) Tri-Band Base Antenna. Diamond MX-72D duplexer Hustler 2 meter antenna and magmount Hustler 2 meter antenna. Dualband 2m/70cm Base Antenna. This design uses a Bungie-cord to keep all. Diamond MX-72D duplexer Hustler 2 meter antenna and magmount Hustler 2 meter antenna. The UHF J-Pole antenna is designed and tuned specifically for the 70cm amateur radio band. Portune, W6NBC here made from a threaded table lamp tube, the lower part of the whip becomes the cen -. Three Simple Home Brew 2-Meter Antennas. 95 * Buy It. can do better with a 2nd connector and tap. The stand is a piece of steel pipe in a wooden stand that I rigged up. Satellite, ssb, fm Similar to the popular "Arrow" antenna Powered by two cables 50 OhmOperating. I'm confident you will find this portable "J" to far exceed any other antenna, in the same setup, to more than tripling your 2m & 70cm (440MHz) performance! Here is a step-by-step to make a portable (or base) 3/4 inch copper-pipe "J" that breaks down into four (~24" long) pieces for easy transporting. Oct 9, 2018 - radioamateur infos et news Ham Radio F5IRO. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. 50 mm RG402 extension to prevent capacitive reactance between the PCB antenna and the transverter metal case. 2(a): You can see that when erected in a straight line the dipole is quite directional. · Homebrew 6m 50 MHz antennas for amateur ham radio » DigitalHam Matches 1 - 24 of 24 – Phil Salas AD5X 40 through 6 meter HF Portable Antenna. EUR 14,57 spedizione. 2019: Nelson Antennas Matchbox 9:1 unun end-fed random wire antenna 41′ with 17′ counterpoise for 80-6m. Saved by sa0bgi-sv7jlz 16. | Add to Compare. 2dBi 5/8 wave x2 70cm: 8. This antenna is vertically polarized by feeding the top and bottom loops in parallel (see Figure 1 ). Stealth antennas for the loft Fig 4. I keep it straight by strapping it to a wood dowel that I got from Home Depot. Matching is excellent on all three bands and can be tuned independently. Attach two 22 inch antenna arms to a long whip antenna. Hcounter App. Wide band base antenna By Guest. My father has run one using 100w on 2m with no problems. go into a BNC, PL259 etc etc. In addition, specific models mentioned in the antennas forum like diamond antennas and more are here for future reference. I settled on a 2 meter vertical dipole. Any of my search term words; All of my search term words; Find results in Content titles and body; Content titles only. 145 x 3 = 435). Built a home brew J-Pole antenna. Another 9 Element VHF Yagi Design. The WD9EWK station used for this contact, and to record the NA1SS audio, was an Icom IC-2820H 2m/70cm FM mobile transceiver, transmitting at 5W into an Elk Antennas handheld 2m/70cm log periodic antenna. Posted on Thursday, October 12, 2006 - 9:36 am: Going to put up my little vertical antenna for my 2 meter radio this weekend. 5 out of 5 stars 40. Potential uses for 70cm antennas include FM and repeater work, long distance SSB contacts. 4 Comments. It is worth reading this post in conjunction with my other posts on cavity filters and duplexers. The antenna being tested in the garden. I have installed a separate handheld microphone to the HT. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 5 Connector: UHF female Element Phasing: 1-1/2l, 2-5/8l The Tram Dual Band Mag Mount is the ideal choice for a simple, high performance mag mount antenna. I separated my uplink and downlink omni antennas by 30 feet, which reduced my mode JA desense. The next antenna were the so called Cloverleaf, or Big Wheel antenna. Yagi UHF Antenna for the 70 Cm Band (430-440 MHz) by F4HWK: In this tutorial i show you how to build a Yagi antenna for the 70 cm band (430-440 MHz). I've taken what I learned from the GMRS … Continue reading "Homebrew 5 Element VHF Yagi". 6m/2m/70cm Yagi Antenna Built from Old TV Antenna by KGØZZ This turned out to be a great little antenna. Regular price. Satellite Yagi 2m 70cm Tape Measure Antenna Homebrew - First Built a Yagi 2m 70cm Tape Measure Antenna for amateur radio satellites but this video shows me having a QSO of a repeater about 20-30 miles away. With this antenna, you could set one up with 80 m whips and setup an antenna tuner and use it on 80, 40, 20 and 10 m bands. December 16, 2017; By Admin Filed Under DIY; No Comments Homebrew a dual band antenna for handhelds home brewing diy 2m 70cm mobile projects in 2020 ham radio antennas the portable or base copper pipe j by n6jsx wbØtge s mighty woof 440 mhz fan dipole school com. The grill that stops your child from putting their hand near the blades. How a Beverage Antenna Works. 4 SWR use this antenna on 432-MHz SSB or 436-MHz satellite, the extra band-width is. No duplexer needed. 0 dbi/70cm vs 6. For a typical dual-band “base” VHF/UHF antenna designed for exterior mounting on a structure or mast you can expect to pay from $35 to $300, depending on quality, durability, and performance factors such as gain. 145MHz x 3 = 435MHz – that’s 2M to 70cm or VHF to UHF] The modification involves placing a coax phasing sleeve of aluminium foil around the outside. In past posts, we have built several 2m portable antennas. 6/1 in the middle and up to 2. Sep 23, 2017 for the love of physics walter lewin may 16, 2011 duration. 145MHz x 3 = 435MHz - that's 2M to 70cm or VHF to UHF] The modification involves placing a coax phasing sleeve of aluminium foil around the outside. The system was developed in the late 1990s by the Japan Amateur Radio League and uses minimum-shift keying in its packet-based standard. Pre-tuned to give best bandwidth and VSWR when mounted on the side of vehicle (i. The PVC end caps are hand tightened. ANTENNAS USED FROM LEFT TO RIGHT: DIAMOND A144S10R & A430S15R YAGI'S (Base 2m-70cm) SIRIO GAIN MASTER (Base 10m-11m-12m) DIAMOND SG-7900 (Mobile 2m-70cm) DIAMOND X-7000 (Base 2m-70cm-23cm) SIRIO PERFORMER 5000 (Mobile 10m-11m,12m) ANTENNA ROTATOR: Channel Master 9521A. MFJ-971 Portable Antenna Tuner Modifications - M0UKD - Amateur. My Radio Room and Mobile Setup: Mobile Antennas:Yaesu ATAS 120 Auto Tune for FT-857D, and Diamond CR-8900A for FT-8900R Quadband. Build your own 2m/70cm 3 Elements VHF by 5 Elements UHF Yagi antenna with excellent gain for both VHF and UHF operation. When I had a real home with outdoor antennas I used to like grid hunting on 144Mhz SSB and CW. HF – 70cm Multi-Band Mobile Antenna. 2m 70cm collinear antenna [email protected] 2m 70cm collinear antenna. Uses: This antenna is good for satellite use because of its F/B and relatively good gain on 2m and 70cm. Premium quality anttennas for two bands. Antennas: - 70cm 6 element home brewed DK7ZD yagui for 70cm (~17dBi, 75 cm the antenna and 1,05 meters of total boom made from white PVC. 6M/2M/440MHz tuning is pre-set. It will probably perform well for weak signal QSOs, but because of it's fork pattern on 70cm the noise floor might be higher than with a 70cm yagi. 95inch Magnetic Base/13ft (4m) RG-58 Coax Cable PL259. The coil & the whip are one piece. Other antennas in use (pictures may be coming soon) include a homebrew Buddipole for multi-band HF; a 6m beam from M2 Antennas (not yet installed); an MP-1 portable screwdriver for ultra-portable use with the FT-817; a Cushcraft 2m yagi; and of course numerous whips and such for mobile and HT operations. ARRL 5828LOW POWER COMMUNICATIONS 4th EDITION. An antenna tuner is required for this antenna to properly function. A compression hose clamp can be used to secure the PL-259 connector, attached to the feed line, in the end of the mast. Be prepared and able to communicate in case of emergency with the largest selection at eBay. It's about time, isn't it. The distance between one point to another adjacent point in a wave is known as the wavelength. ANTENNAS USED FROM LEFT TO RIGHT: DIAMOND A144S10R & A430S15R YAGI'S (Base 2m-70cm) SIRIO GAIN MASTER (Base 10m-11m-12m) DIAMOND SG-7900 (Mobile 2m-70cm) DIAMOND X-7000 (Base 2m-70cm-23cm) SIRIO PERFORMER 5000 (Mobile 10m-11m,12m) ANTENNA ROTATOR: Channel Master 9521A. Make a 2 kW Windom Balun. 980 downlink). Installing 70cm antenna. Of course, to use the same thing for 70cm, or any other frequency over 2m, all I have to do is screw on another piece of tubing. The longer the antenna, the. 1 The SWR is almost as broad, with better than 1. HF Mobile radio: Yaesu FT-891. 70cm Vertical Antenna. There are some quad band mobile antennas that will allow me to use those bands in my vehicle (where I can legally operate), but I don't seem to find one antenna that can do all four as a base antenna. 2m-70cm antennas. Mobile antenna: Yaesu ATAS-120A. Disadvantages. A coaxial collinear antenna for 70 CM this coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. 5 Connector: UHF female Element Phasing: 1-1/2l, 2-5/8l The Tram Dual Band Mag Mount is the ideal choice for a simple, high performance mag mount antenna. 2M Square Dipole Construction. A Simple 2m/70cm Vertical Dipole Antenna This easy to build dual band VHF/UHF antenna makes a great project for the new ham that is ready to get on the 2 meter and 70 centimeter amateur radio bands. A Choke Balun for 160M to 10M. FM Band Outdoor Dipole Antenna; Tunable 87-108 MHz FM Band Broadcast Antenna. I was looking for something that was vertical, omnidirectional and with good gain that I could make quickly and easily. The circuit works through VHF and lower UHF, but it can not easily be calibrated for more than a single ham band. Ian G3SEK - Tuesday, July 31, 2001 at 21:34:55 (GMT/BST). 2m-70cm Antennas. Verkäufer: sigma-4-antennas ️ (21. I made the second one specifically for on the road mobile use in a fiberglass body RV which has little to no ground-plane available so a conventional 2m mobile antenna would have several difficult issues to overcome (if even possible). The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. 2-section pole is 8 ft. • 2 1/4 inch x 48 inch Steel rods (I know they'll rust, it's just temporary to get it to work, I'll get aluminum later) I don't have any coaxial cable (don't know the best type to get) and don't know how to match the impedance of the cable to the antenna. 2m/70cm Dual Band Mobile $129: TYT TH8600 25 Watt 2m/70cm Mobile $129. Altitude 6 m. 2m 70cm Dual Band Antenna 144 432 Mhz Yagi. Underside view. SWR ranges from <2 to flat on all frequencies on 2m and 70cm. Don Murray W9VE Building a Dual-Band Antenna Mentorfest 10/23/04 2 Rubber Ducks are Kinda Like Rubber Chickens however the base of the 5/8 antenna presents a relatively low impedance, not the high impedance offered by the ¼ wave stub. Other antennas like Elk Antennas 2m/70cm log periodics or homebrew equivalents of these popular commercially-made antennas could be used in place of the Arrow Yagi. Dualband Mobile Antenna 2m/70cm VHF/UHF Ham Radio, 137-149, 437-480 Mhz, Magnet Base PL-259 Connector, 10 Ft RG58 Cable. Mobile antenna: Yaesu ATAS-120A. Are those Baofengs actually any good? Are the Wouxuns better for triple the price? Do the Yaesu £120 jobbies wipe the floor with them? I like the look of this:. The Diamond X-300 2m | 70cm Fixed Station Vertical. And you don't need much room either. 26th September 2014. This ANTGAIN dual-band antenna covers a super wide frequency range of 140-162/435-467 MHz (less than 2:1 SWR) with 3 dB gain on VHF and 5. I have an MFJ Antenna Analyzer 259B which basically made my extremely crude efforts pay off. Icom IC-9700 transceiver; Wimo 2m & 70cm X-Quads; SSB Electronics Preamps; M1BXF antenna phasing switch; Yaesu G-5500 computer controlled rotator system. Diamond D-130J (25-1300MHz discone, connected to the FT-9800R) Homebrew wire vertical hanging from a redwood tree, connected to the FT DX 3000, via a SGC SC-237 autotuner, at the base of the antenna, with a really terrible (too short, too few. See you on 2 fm! Notes "5/8-Wavelength Vertical. Use one radio with this antenna. Diamond X-300 2m 70cm Base Vertical Antenna. I also worked several satellites. Alinco DM-330MV 32-Amp Switching Power Supply. Diamond MX-72D duplexer Hustler 2 meter antenna and magmount Hustler 2 meter antenna. The antenna is designed to be fed with 50 or 75 Ohm Coax Cable of most any length with a Balun. So was the 70 CM Antenna, Ham radio Antenna for VHF and UHF. Simple Quarter Wave Ground Plane. HV7A 10M/6M/2M/440/+ Antenna. Depending on the 2 meter and 70cm frequencies you choose for tuning your antenna, you might have to compromise a little. There's a nice paper on Tape Measure Yagi's here that will help in yagi design. I keep it straight by strapping it to a wood dowel that I got from Home Depot. Any suggestions on an easy antenna to buy and reasonable base radio (mobile is cool). two ring terminals. ) DBJ-2 (ham) dual band roll up antenna kit - (144-148 MHz and 440-450 MHz) Includes adapters for BNC, SMA and SMA - female. Icom 2100H 2M mobile/base. 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 element and the radials. The radio was powered by a 12V/26Ah jumpstart battery. 0 vdc Any small signal diode will work (Germaniums are best for QRP) Shield on coax used as a Faraday shield (grounded on one end only) Tandem Match Coupler 5/4/2012. Homemade vertical dipole for HAM 2 meter and 7. Cut 1-2 inches of 3/4” pipe and put it on the opposite end of the tee with a 3/4” 90 off of it and push your feedline through all this as you do it. 1145 - VK4SMC. My main shack location has a commercial J-Pole Dual band mounted on a short mast. Homebrew 2m moxon. 10m ,20m,40m to orderFlex FWC. ) capacitively shielded loop antenna that I developed for two meters. Dec 14, 2019 - Home-brew Compact 6dBi Collinear Antenna (first published September 2005, details of higher-gain version added July 2013) This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802. 2(a): You can see that when erected in a straight line the dipole is quite directional. Built a home brew J-Pole antenna. Anything that works at 2m, will sorta work at 440Mhz, but you. I have an MFJ Antenna Analyzer 259B which basically made my extremely crude efforts pay off. This design uses a Bungie-cord to keep all. Transceivers Transceiver Accessories Amplifiers RF Antennas Antenna Tuners Rotators Antenna Accessories Antenna Analysers Power Supplies Microphones Speakers & Headsets Morse Cables, Diamond X-300N - 2m/70cm Base Vertical. 2m Projects - Omnidirectional Vertical. Height: 50". Place a 1:1 Balun on the Antenna end of the Feedline. Here i present all steps to build this antenna. This antenna was designed for FEMA and is ideal both as a base antenna as well as an emergency antenna. Matching is excellent on all three bands and can be tuned independently. 70cm 432MHz DIY Yagi / Beam Antenna. This model was designe. Most of the energy at the third harmonic is launched at 44º. Antenna HB9cv for 446 MHz. 5cm was cut from the driven element and 1cm from all radials. 2db * power 200w * type 6/8, 3x5/8 * length 1. Simple and easy to make using parts from an old TV antenna. Seller: paul_koshaolin ️ (58) 100%, Location: Koszalin, Ships to: GB, Item: 114528733814 11 el dual band CROSS YAGI for 2m and 70cm (144-146 and 430-440 MHz) 2xN socket. This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. In addition, specific models mentioned in the antennas forum like diamond antennas and more are here for future reference. Satellite Yagi 2m 70cm Tape Measure Antenna Homebrew - First Built a Yagi 2m 70cm Tape Measure Antenna for amateur radio satellites but this video shows me having a QSO of a repeater about 20-30 miles away. 2 Meter 80W All Mode Amplifier 1 KW 2M LDMOS Amplifier 1 KW 222 MHz LDMOS Amplifier 500w 70cm Amplifier 1KW 70cm LDMOS Amplifier A Big Power Supply for SSPAs Low Pass Filter/Dual Directional Detector Sampling RF Power LED Bar Graph Meter Amplifier Control Board LNAs (preamps) and MMICs LNA Sequencing and Protection Building UHF Antennas VHF. 0 dBi/2m & 8. 2m-70cm Antennas. Electronics Projects. We offer a huge selection of Yagi antennas, including cross-polarized and circularly polarized, from top brands like M2 Antennas, Cushcraft, MFJ, and Diamond Antenna. Install 2m antenna. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. Antenna: Twinlead J-Pole antenna - homebrew Diamond Super Gainer 2m/70cm dual band mobile whip antenna, SG7500 complete with trunk lip mount and coax - there is a small cosmetic bend at the top of the antenna. ME270 Dual band 2m/70cm base colinear - Mirfield Electronics. NR72BNMO 2M/440 Antenna. 2 in Stock. Electronics Projects. The 40M, 15M and 10M coils come with the antenna and are installed in the photo to the left. 6m 2 ELEMENT 50-54MHz 6. Any suggestions on an easy antenna to buy and reasonable base radio (mobile is cool). MR77 & MR77SMA 2M/440 Antenna. just make sure you are horizontally polarised. This item Comet SBB-5NMO 2M/70cm Dual Band Mobile Antenna Diamond Original NR770HB 144/440 MHz Dual-Band Mobile Antenna, Black, Gain: 3. CB Antenna is a K-40 Magmount. Every beginner uses this whip in his starter setup. Here, you'll find links for high gain antennas covering hf-vhf-uhf. This antenna is designed for amateur band frequency for both VHF (2m) and UHF (70cm). 2m 70cm base antenna homebrew 2m 70cm base antenna homebrew. Cut 7 feet of ½″ CPVC. Ian G3SEK - Tuesday, July 31, 2001 at 21:34:55 (GMT/BST). I plan on using the RG8 foam or the RG 213. DBJ-1 (commercial) dual band base antenna - (152-157 MHz and 460-470 MHz). If you don't have an old TV antenna then you'll need some 3/8" aluminum tubing for the elements and the gamma match and a 1" square aluminum tube for the boom. ) capacitively shielded loop antenna that I developed for two meters. At 70cm though, they could be loaded with a coil to make a 5/8 wave antenna. by bigpimp347 » 11 Feb 2010, 17:06. I'm confident you will find this portable "J" to far exceed any other antenna, in the same setup, to more than tripling your 2m & 70cm (440MHz) performance! Here is a step-by-step to make a portable (or base) 3/4 inch copper-pipe "J" that breaks down into four (~24" long) pieces for easy transporting. Diamond A430S15 High Gain 430-440 MHz UHF 70cm Amateur Ham Radio Base Antenna. This antenna was vector-gain 3D patterned with 10 degree spherical resolution from 400 to 470 MHz in 1 MHz steps. Saved by sa0bgi-sv7jlz 16. 2(b): But when erected as an inverted-V you gain a couple of S-points (10 - 12dB) in the. ARRL 5828LOW POWER COMMUNICATIONS 4th EDITION. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. Photo Gallery. Maximum power input 75 watts. HV7A 10M/6M/2M/440/+ Antenna. DIAMOND CP62. 70cm 432MHz DIY Yagi / Beam Antenna. I'd go with the x300 for the higher gain because of my semi-remote location. NR72BNMO 2M/440 Antenna. One thing I was wondering about is why the 2m and 70 cm elements aren't perpendicular to one another as. It is used between the transmission line of an HF antenna system and a transceiver or transmitter. Quarter wave wave trap on VHF Aircraft Band ground plane The RG-58C/U coax stub exits the rain cap and extends away from the antenna. Remote homebrew PA - LNA units on 144, 222, 432, 902, and 1296 MHz are located neat the antennas. MFJ-971 Portable Antenna Tuner Modifications. The larger the wire, the wider the bandwidth. Male SMA to BNC Adaptor - - To Connect BNC Cables to your SMA equipped Radio (Some Yaesu and ICOM Radios. 5/1 at the lowest edge and around 1. 2m 70cm Yagi On2pco. This proved to be a far superior alternative to standard mobile equipment. DC ground structure, which escapes high voltage caused by lightning, protects your radio and equipment. 2 GHz band, DX Engineering has a VHF/UHF beam antenna that can deliver the clean, clear signal you demand. A J-Pole antenna is a half-wave vertical fed at its base through a shorted quarter-wave stub acting as a transformer matching section. ON6MU: UHF 4/6/10 Element Yagi Antenna for 70-cm. 0 dbi/70cm vs 6. Its purpose is to make the antenna system "look like" a purely resistive load - usually 50 Ohms for the vast majority of ham radio transceivers or receivers nowadays. Home-brew Compact 6dBi Collinear Antenna (first published September 2005, details of higher-gain version added July 2013) This page details the construction of an easy-to-make collinear 360 degrees omni-directional, vertically polarised, antenna for 802. - $40 (also available in 250 watt version for $60 - please email me for this special order item. VSWR is 1:1 on 1296 MHz and 2. It is used between the transmission line of an HF antenna system and a transceiver or transmitter. I constructed a prototype for the 2-meter band using the bare ground wire from ordinary 14 gauge NM electric cable. TRANSCEIVER ANTENNAS. 2 Meter Attic Antenna. If there is an ATV repeater or close by ATVer in your area, you might see something by connecting your cable ready TV to a 70cm antenna on the roof, then calling "CQ ATV" on 144. I still had the coax outside on the roof and the pole which were both used previously for my 2m/70cm. Share - Ground Plane Base Antenna 2 Meter 70cm Dual Band HDuty Amateur The SWR is 1. CHA-250B The Comet CHA-250B is a newly designed broadband vertical requiring NO GROUND RADIALS. Hobby Electronics. 9MHz (centre of 2m 145. A Choke Balun for 160M to 10M. HV7A 10M/6M/2M/440/+ Antenna. Radio 6 Elements Uhf Yagi Antenna. Alinco DJ-191TH 2 Meter HT. It can be mounted on a roof top for use as a fixed antenna and it also folds conveniently for travel making it an excellent backpack antenna. It will probably perform well for weak signal QSOs, but because of it's fork pattern on 70cm the noise floor might be higher than with a 70cm yagi. 11b/g wireless networking. 00 FT900AT Our Price £1359 Save £140 Z4 2m70cm M whip wlockino collar £33. J-Pole antenna for 146 MHz, 220 MHz and 440 MHz. There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. For now I will be using an HT connected to a base antenna. • 2 1/4 inch x 48 inch Steel rods (I know they'll rust, it's just temporary to get it to work, I'll get aluminum later) I don't have any coaxial cable (don't know the best type to get) and don't know how to match the impedance of the cable to the antenna. 45MHz and a perfect match to 50Ω coaxial. I'm thinking about getting a tri band antenna to use for receiving VHF and UHF as they are quite often said to be a good compromise for general scanning. The DIY antenna manufacturing has two advantages: you can build a cheap antenna, exactly with the parameters you need. Excellent 2m 70cm Yagi anatennas for balcony use. I can put one up fairly high on the roof of my house, but the base antennas are quite expensive, starting at around £80. 2m/70cm vertical dipole antenna.