2m 70cm Base Antenna Homebrew

Homebrew Antenna Tuner For Ham Radio Diamond A144S10 High Gain 144-148 MHz 2 Meter Amateur Ham Radio Base Antenna. Read the QST review of the model OA-50. 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. (70cm) + 7 El. Vertical Dipole Portable Base Mobile Alpha Magnetic Loop antennas. EggBeater Antenna - VHF/UHF From K5OE Eme Arrays — A Collection of EME Reflector Antennas and YAGI Arrays. A local friend that I told about this antenna project built it today. The Portable Or Base 2m 70cm Copper Pipe J Antenna By N6jsx. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. This month I decided to build a 2 meter 5/4 wave antenna. chrome whip. 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). "Local" in Crosby, North Dakota, means 50. You will probably need to attach guy lines to the antenna. on the 70 cm (440 MHz) band and 25 MHz. I want to set up a decent 2m/70cm station for starters and I realize that a better radio is important but wanted to knock out the antenna situation first. About SWR; My OSJ 146/440 J-Pole went through 3 hurricanes in 6 weeks, with gusts speeds, on occasion, as high as 153 MPH. -Ultralight-Yagi for 2m can be used on 70cm with an SWR of 1,5 without any changes. Free delivery and returns on eligible orders. A single antenna can cover the entire amateur 2m/70cm allocation with more than acceptable SWR. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. It reminds me of two "Wouff Hong" antennas (created by Hiram Percy Maxim) joined together at the base and creating an awesome signal. WB2HOL 's 2M Tape Measure Beam (used mine to work the ISS!)--Mods to Joe's Tape Measure Beam--Tape Measure Beam KITS! W6NBC' s 2M/70CM Tape Measure Beam Project -. ARRL Product Review of the M2 6-Meter HO Loop Antennas. In a short vertical antenna the Earth current = Antenna current. 2m/70cm dual band j-pole antenna project. 70 cm 6/8 Element Beam. It can produce similar results to a commercial version and be made from scraps of coax. 30 thoughts on “ Improve Your HT Ham Radio By Adding A Counterpoise Antenna Wire ” scorinth says: I tried one tonight and it worked great on 2m but reduced my 70cm range. All antennas would be rear mounted and the 70cms X-pol rotated 45 degrees in order not to be in the same plane as either set of the 2m antennas to avoid the 'third harmonic issues' that exist between 2m and 70cms. This is Part 1 of my evaluation of this antenna where I check Return Loss on both bands. Having purchased an all-mode, all-band (160m - 70cm) transceiver, I became curious about what 2-meter weak signal operations have to offer. On6mu S Radio Homebrew Electronics Schematics And Antennas. With twice the gain of a standard J-Pole antenna, the 2 meter Slim Jim antenna is a J-Pole on steroids! The Slim is an end-fed folded dipole antenna that has a gain of 6 dbi and a nice low RF take off angle. Assuming we have a base-loaded antenna, and the operating frequency has a wavelength of 550 feet (around the 160-meter band), a 15. 75 results for 2m 70cm antenna Save 2m 70cm antenna to get e-mail alerts and updates on your eBay Feed. Homebrew 2m Moxon. Antenna gain is measured in either dBi or dBd. Diamond Antenna A430S10 SKU:. *2 Meter Base Combination Antenna* Cleaning up the Antenna Farm By: gm3 13 December 2002. The antenna offers a gain of about 10 dB, is lightweight, mechanically strong and rivals the performance of similar commercial antennas. Ham Radio Satellite Antenna Simple, inexpensive and lots of fun! Here is an easy to make home brew antenna that can get you on the air working satellites or be built for use as a portable Activities For Radio Hobbyists – Radio Control Radio controlled (RC) toys can be toy grade or hobby grade. 10 was a 2. It is important to note that …. home brew Hf antenna. The car provides the counterpoise to the antenna, but it is connected to the base station in the house. Tel: 0845 2300 599. I built a copy of the Arrow OSJ and it was great on both. This month I decided to build a 2 meter 5/4 wave antenna. Although it has two sets of directors and reflectors there is only one driven element, so only one coax. 2 meter collinear by m3fvb. Remove the shield from the DE about. Since we position antennas the highest we can, there must be a conductive element that acts as a reflective ground. I wrapped the antenna wire to the gardening wire. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. It is very easy to create a simple 1/2 wave dipole, all you need is some lengths of wire such as the core of some mains flex or even a straightened out metal coat hanger, some co-ax cable and a connector for your scanners antenna input (usually BNC or SMA). The DBJ-1: A VHF-UHF Dual-Band J-Pole Searching for an inexpensive, high-performance dual-band base antenna for VHF and UHF? Build a simple antenna that uses a single feed line for less than $10. I have just bought a basic meter for 2m/70cm from Moonraker and, once I get the ladder out to do come antenna maintenance, I'll let you know how I get on with it. on 23 cm (1200 MHz), making the antenna an excellent candidate for ATV repeater use. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. But don’t be misled – just because they are easy to make doesn’t mean they don’t work well. RF along the outside of the coax turns it into an antenna that radiates along with your real antenna which, if strong enough, will mess with your antenna pattern; A bit less energy makes it to your intended target… the antenna elements; Fortunately the cure for all the above is simple… a choke balun. Today, I'm going to show you how you can easily build a homebrew 2 Meter ¼ Wave vertical antenna for under $10. The pattern and the currents of the Yagi are shown down. Best price I could find on the Internet and shipped quickly to my local WALMART store. It can produce similar results to a commercial version and be made from scraps of coax. Resources listed under 70cm antenna category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. What you need is a fixed body mount on the roof so the antenna doesn't fall off and a flexible stainless steel whip so it can bend. Money Back Guarantee ensures YOU receive the item you ordered or get your money back. The Diamond D-130J Super Discone Scanner Antenna is the first ultra-wideband antenna in the market which can cover amateur radio, air traffic control and other various utility frequency bands and, in addition, even some amateur radio frequency bands within the covering frequency range can be transmitted with this radio scanner antenna alone. EggBeater Antenna - VHF/UHF From K5OE Eme Arrays — A Collection of EME Reflector Antennas and YAGI Arrays. (2m) crossed satellite antenna 15 50MHz ­ DX News 29 RRFF SSnniiffer 21 9 tips fpr. 15-1,1-chome Sugamo,Toshima-ku Tokyo,Japan. Find great deals on eBay for 2m 70cm base antenna. This antenna was designed for FEMA and is ideal both as a base antenna as well as an emergency antenna. Tuned to 445 MHz, the UHF band J-Pole antenna covers the upper half of the 70cm amateur radio band, which includes the repeater, remote base, link control, and simplex allocations of this band. 4" 2m / 70cm / 23cm:. HAM and PMR Micophones. 2 meter ultra cheap antenna. 0 MHz region, the broadbanded antenna will. Before I had. The antenna is unaffected by either and I have used both at different times. Having purchased an all-mode, all-band (160m - 70cm) transceiver, I became curious about what 2-meter weak signal operations have to offer. On Tuesday 8th August, there was a planned contact between the ISS and YOTA at 1837 UTC, so I decided to have a listen. Use a base extension to increase performance, and as many ground radials as possible. Check your tuning before you solder your leads on the driven element if you plan to TX on this antenna or you could potentially damage your radio!!!! An additional antenna is typically required to TX on the 144 Mhz band (typically the uplink frequency). You can fold the antenna over until it touches the roof of the van and the mag-mount stays put. 2m / 70cm Antenna install to please Wife and I I have a Browning NMO 5/8's mobile antenna, on a browning NMO ground plane base. They have an article posted from one of their newsletters describing some loose tolerance multielement beam antennas. Many hams’ first choice of antenna is a half-wave dipole. Money Back Guarantee ensures YOU receive the item you ordered or get your money back. This month I decided to build a 2 meter 5/4 wave antenna. home made collinear antenna. Pretty basic in design but the one I use for transmitting on 2m/70cm for my… Read More ». If 9 dB gain is still not enough for you then increase the number of coax elements from eight to sixteen. A couple of old cavity resonators were discovered in the back shed. 95 Your Price: $101. The resulting antenna has the same strength as a one piece structure. There are many simple choices that don't involve trying to put a large antenna on a roof. Typically, when I do my research on a piece of equipment I'm looking for I tend to go with the majority of HAMS. 5dBi gain over a 1/2 wave length antenna (mounted same height) by shaping some energy from vertical direction to the side. It mounts on a mast (not supplied) from 1. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. 160m End Fed antenna (February 2015) Some history … About two years ago, February 2015, I had a QSO with ON9CC/OT6M (Frank) on the 160 meter band. The shorter 70cm waves have a much easier time getting through window openings than the longer 2 meter waves. 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). Antenna [ HOMEBREW ] Second life of dead MFM Hard drives 6 [ CATEGORIES ] POST IT ! 3 Ato D conversion 4 DDXX Caleendaar 244 The history of Torre Bert 36 [ HAM­MAG N. 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. Find many great new & used options and get the best deals for Ham Radio Beam Antenna Model U440-11 70CM 11 Element Yagi at the best online prices at eBay! Free shipping for many products!. The cost savings was just enough to speed things along. 2 METER 5/8 WAVE ANTENNA Model 2M-4 MSRP* $25. A Quick and Simple 2 Meter Ground Plane Project! If you are just getting experience in building antennas or you are an old pro, here is a simple and fun project! This antenna is perfect for those hams living in the primary coverage area of the repeater for 2 meter use. Many antennas are based on half-wave dipoles fabricated from wire or tubing. 2 meter ham radio antennas car. THE (VHF) DIPOLE ANTENNA At VHF and UHF, most antenna systems are derived from the dipole or its complement, the slot antenna. 15dBi, 5/8 wave VSWR: 1. I spend a lot of time deep in the bush on forest service roads and i need the option to pop the antenna off before random branches decide to do it for me. A homebrew 2m 144. The antenna has a main lobe pointing just upside and the horizon gain, the one used at DX work, is minus 0. Its hanging from a hook on my porch at the condo. 1/4 wave 2m antenna, use that for 70cm too. Light weight, great for fixed, portable or indoor mounting. The whole antenna was then lifted and slid over the moulting pole. The original sleeved dipole project idea is from Harold Melton KV5R. Many amateur radio satellites have an uplink frequency set at around 145 MHz, and a downlink frequency around 435 MHz (and some satellites have the frequencies. Now was as good a time as any to make this antenna the. (2m) crossed satellite antenna 15 50MHz ­ DX News 29 RRFF SSnniiffer 21 9 tips fpr. homebrew collinear j pole for dual band vhf uhf antennas. All I want to use it for is a couple of local FM repeaters so nothing special is required. The photo to the right is an example of how the antenna may be supported with minimal holes or damage to the wall. Bandwidth is normally 10 MHz. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. (70cm) + 7 El. Figure 2--This EZNEC plot shows the difference in the radiation patterns between a vertical half-wave radiator operated at its fundamental. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. 2 meter collinear by m3fvb. Multi Band HF / VHF / UHF base antennas. The higher gain antennas have a lower vertical beamwidth. -Ultralight-Yagi for 2m can be used on 70cm with an SWR of 1,5 without any changes. homebrew collinear j pole for dual band vhf uhf antennas. I have constructed many J-antennas along this line and have used stainless steel rod with lucite braces for a bicycle mobile application obtaining superb results. It's a good idea to have your antenna at least one half ( 1/2 ) wavelength of the antenna. This antenna meets the demands set by ARES/RACES group for ruggedness, easy deployment, and performance. Separate systems with nearly zero interaction between the two antennas. Diamond Antenna A430S10 SKU:. This month I decided to build a 2 meter 5/4 wave antenna. Our antenna is now complete except for a way to mount it. 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. WB2HOL 's 2M Tape Measure Beam (used mine to work the ISS!)--Mods to Joe's Tape Measure Beam--Tape Measure Beam KITS! W6NBC' s 2M/70CM Tape Measure Beam Project -. The Firestik 2-Meter antenna is an omni-directional antenna for the 144 to 148 MHz, 2 meter amateur band. Readers of this blog will attest to my affection for antennas made from locally available copper. 2 meter ham radio antennas car. Ham, Amateur Radio Antennas, Antennas, Radio Communication, Consumer Electronics. Antenna gain is measured in either dBi or dBd. 2m Projects - Omnidirectional Antennas A Simple 2 m/70 cm Vertical Dipole Antenna by KGØZZ The Qyadrifilar Helix as a 2 Meter Base Station Antenna by W6NBC. Simplified 2 Meter J-Pole (pdf) Michael Martens KB9VBR. I’m building another 2m/70cm (slightly modified for 477MHz) this one will act as a PRS and 2m scanner antenna. In addition, specific models mentioned in the Antennas forum Like diamond dual band mobile antennas,and more are here for future reference. Hello, I live in a neighborhood that is dominated by the H. Specialising in new & used Ham (Amateur) Radio, Commercial Two-Way Radio, Marine & Aviation equipment. This is the vertical radiation pattern of a ground plane antenna over a so-called perfect ground. 7) CUSHCRAFT A627013S - 3 Elements 6m/2m/70cm Triband Yagi Antenna 8) CUSHCRAFT AR270 - Dualband Vertical 2m/70cm 3,7/5,5dB Homebrew Hf Vertical Antenna Diamond GAP beer Cushcraft Belden Tram HF Ranger SSB Palomar Texas Star Heil microphones vertical cubical quad antenna 70cm 4 ELEMENT UHF YAGI ANTENNA. Simple to make 2m/70cm antenna project for portable use. Adobe Reader required. The 1st DIR length was calculated by reducing the dimensional length of the DE by. the “ll cool j” 2 meters for a song. Half-Wave Flower Pot Antenna. What configuration is that one (2-5/8 and 4-5/8)? The Radiall Larsen Kulrod is a center loaded 1/2 wave in 2m and collinear 5/8 wave on 70cm with gain of 3. I have never once built a home-brew aluminum antenna. The antenna offers a gain of about 10 dB, is lightweight, mechanically strong and rivals the performance of similar commercial antennas. Though disappointed in losing, it did prove to Kent that the antennas can be easily replicated with consistent performance. 2 METER 5/8 WAVE ANTENNA Model 2M-4 MSRP* $25. Use with Baofeng, Wouxun, TYT, Yaesu++ See Description COMET GP-9 Base antenna, 2m/70cm. The W7LPN 2 - 440 Vertical Collinear Antenna Project with a 6 Meter Surprise! by W7LPN ~ Rick Frazier UPDATE! Download the updated and easier to build (12-08) version It is a pdf file and is under 1 meg file size. If you need to relocate, disassemble the antenna and store it inside your vehicle during transit. 9Hz for Hampshire) which is much better as I remember during some really good atmospherics you could end up talking through 2. Arrow Antennas - pictured, left--K6LCS’ Arrow Antenna Mods. HAM ANTENNAS. Bandwidth is normally 10 MHz. See more ideas about Ham radio antenna, Ham and Hams. A few half assed radials and a poor location, plus a custom base matching device for 80M and 30M and I was in the vertical business too. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. Aug 7, 2019- Explore My Info's board "homebrew antennas" on Pinterest. Operates without radials. The recent addition of an Elecraft XV222 transverter and homebrew Yagi completes my coverage up to 70cm. Tuned to 445 MHz, the UHF band J-Pole antenna covers the upper half of the 70cm amateur radio band, which includes the repeater, remote base, link control, and simplex allocations of this band. Many of us have been waiting for a practical 70cm solid-state amplifier design. (2m) crossed satellite antenna 15 50MHz ­ DX News 29 RRFF SSnniiffer 21 9 tips fpr. Dual Band VHF/UHF Slim Jim Antenna. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. Antenna gain is measured in either dBi or dBd. 170-0002 Phone:03-3947-1411 FAX:03-3944-2981 E-Mail:[email protected] No damage at all, and it kept right on ticking. There was an issue with the ISS VHF downlink during this pass, so the contact was rescheduled to the next pass, at 2015 UTC. Length Foot Wind MPH; D130J: 2m / 70cm / 23cm: 25-1300 MHz. Short 20 meter vertical antenna. Tel: 0845 2300 599. 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. Home Made Antennas. A few half assed radials and a poor location, plus a custom base matching device for 80M and 30M and I was in the vertical business too. 99 — WA3WMG’s whip can be used to make a dual-band groundplane antenna. Base Station Antennas. I bought a cheapo UV5 right before I got my call sign. I use it for 2m and 70cm, 2m SWR is flat and 70 SWR is other wire at the base and get the 15 to 20 dB back. 2m/70cm Dual Band J-Pole by KK4ICE. No you don't. (70cm) + 7 El. I am fairly new at ham radio and would like some input as to what would be a good gain antenna for 2m/70cm without having to resort to a 10 foot high vertical. Fits mast sizes of 1. A magnetic mount antenna for a car placed on a window air conditioner works well. Since satellite work is concentrated in the 145. 2m 70cm Open Sleeve Vertical Dipole. 17 Customer Reviews. Similar in construction to the X200A dualband, the V2000A has an additional counterpoise radial - adjustable for 6m (52-54 MHz only). Wire antenna homemade 30/40/80m dipole wires inv-v. Though my FD4 was, of course, not the most appropriate antenna setup to use on this band, Frank actually managed to read my signal. Ham Radio Projects By Csaba Yo5ofh. homebrew collinear j pole for dual band vhf uhf antennas. 3 foot vertical would fit the above 10-degree value. You will probably need to attach guy lines to the antenna. Vertical Dipole Portable Base Mobile Alpha Magnetic Loop antennas. This antenna was designed for FEMA and is ideal both as a base antenna as well as an emergency antenna. 00 KENWOOD ABC23 3 x Yi Base Colinear GP9N 2W70CM Base Colinear. collinear antenna 450 mhz schematic. Enter the desired frequency and select the wavelength. The Yagi has three forward lobes (according to the three current maxima in the 3/2-lambda-radiator) with 5,39dBd - 4,35dBd -5,39dBd gain. It is important to note that …. the light weight one piece mast construction permits the antenna to be installed many places easily. Check your tuning before you solder your leads on the driven element if you plan to TX on this antenna or you could potentially damage your radio!!!! An additional antenna is typically required to TX on the 144 Mhz band (typically the uplink frequency). sigma x-30 uhf/vhf 2m 70cm dual band amateur base antenna / aerial ham radio £ 39. 89 dBi The simulation was perfect, but the numbers were not impressive. I need to think what I “need” more at the moment. Vr2xmq Steve S Blog Af Through Shf 70cm Vertical Antenna. The car provides the counterpoise to the antenna, but it is connected to the base station in the house. one quarter (1/4) wave is the minimum height above ground for effective performance. Dipole antennas often are the easiest to build, and then turned into inverted V antennas by raising the center of the antennas up into the inverted V style. You can respond with attachments Homebrew 2M/440 antenna. This makes the 2 Meter Slim Jim antenna a great solution for repeater sites, data and packet stations, APRS, and even every day. 00 FT840 Our Price £779 Save £100 B-10 2M 70CM Mobile Whip £18. Hanging the antenna from a tree presented several constraints such as a. Build a DIY 2 Meter Vertical Antenna Then I took 4 pieces of the copper wire, which will be used for the antenna's radials, and bent a little hook in one end, and then slid one 4-40 screw in the hook of the wire then crimped down the wire around the screw as seen in the photo on the right. Half-Wave Flower Pot Antenna. the light weight one piece mast construction permits the antenna to be installed many places easily. In a short vertical antenna the Earth current = Antenna current. My Diamond X510NA 2M/70CM Antenna Last week I managed to get a Diamond X510NA antenna for free! The only issue was that I had to go and retrieve the antenna off the roof and also remove another antenna which I also got to keep. Tuning for resonance is simple but takes time. (Step-by-step instructions with photos can be seen below, following the project description and safety disclaimer. 2 Element Quad Antenna. It’s construction time again. 15dBi, 1/2 wave 70cm: 4. 10m/2m/440 10m, 2m and 440 MHz Antenna: 20m/2m/440 20m, 2m and 440 MHz Antenna: Cushcraft: Beam Antenna Chart & Index: Vertical Antenna Chart & Index: Diamond: A144-S5 Yagi Beam 2m: A502HB Yagi Beam 6m: F 22A Vertical 2m: F 23H Vertical 2m: V2000A Vertical 6m/2m/70cm: X 30A Vertical 2m/70cm: X 50A Vertical 2m/70cm: X 200A Vertical 2m/70cm: X. This antenna is a bit more difficult to make, but not overly so, and it has the advantage of also being usable on the 70 cm band. The original sleeved dipole project idea is from Harold Melton KV5R. The "the Hairpin Match" is a simple and easy way to fix this problem. V or U Quagi. Sales, Supplies, and Service. A unique method of fastening and isolating the elements to the boom is detailed and presented to the builder. 2M 3 Element Yagi. This does NOT take into consideration the type or size of horizontal reflectors, of even if there is a need for them. Light weight, great for fixed, portable or indoor mounting. VHF Antennas. This month I decided to build a 2 meter 5/4 wave antenna. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from MFJ Enterprises, Inc. Many hams’ first choice of antenna is a half-wave dipole. I decided to price out the aluminum for a home brew portable HF antenna. HAM and PMR Micophones. All antennas would be rear mounted and the 70cms X-pol rotated 45 degrees in order not to be in the same plane as either set of the 2m antennas to avoid the 'third harmonic issues' that exist between 2m and 70cms. My workshop under the garage needed to have a separate antenna, preferably hung from a nearby tree. antennas for vhf and uhf radio bands is a curation of 129 resources about , Copper Cactus Single Coax Feed, 5 elements DK7ZB Yagi for 70MHz, ZigZag Antenna - VHF/UHF unconventional antennas, Compact and effective 2m 70cm antenna, J-Pole Antenna for your Packet Radio Station. Dual Band (2 Meter & 70 cm) Solid Aluminium J-Pole Thursday, June 9, 2011 Dale 8 Comments This is what I have been up to for the last week or so, building this dual band antenna out of solid aluminum, I have used 10mm solid aluminum rod, and 40mm x 40mm x 3mm angle strut for the base and the driven element connected via SO239 3/8″ stud mount. The antenna’s low cost is made possible by modifying a RadioShack FM broadcast receiving antenna (RS 15-2163). The car provides the counterpoise to the antenna, but it is connected to the base station in the house. Low resistance grounding at the antenna base is essential for optimising performance as well as minimising noise and RFI. This is so I can use my 2m and 70cm handheld in the car. It can produce similar results to a commercial version and be made from scraps of coax. 0 and 6 a 2. It's also a great antenna for emergency communication and can be fabricated and launched in a matter of minutes. WB2HOL ’s 2M Tape Measure Beam (used mine to work the ISS!)--Mods to Joe’s Tape Measure Beam--Tape Measure Beam KITS! W6NBC’ s 2M/70CM Tape Measure Beam Project -. Simple to make 2m/70cm antenna project for portable use. 0 over almost the entire band making this an effective antenna on both bands. J POLE FOR VHF/UHF. If you have any questions about which accessory is compatible with your radio please call, email, or use our live chat button for assistance!. I also built a 2m "slim jim" from 450Ω window line, also worked great. Building and experimenting with antennas can be an interesting part of the radio hobby. Optimized for 144 - 145 MHz or 144-146 MHz and 432 - 434 MHz or 430 - 440 MHz. This is reputed to be a re-badged Moonraker antenna (see above). Find great deals on eBay for 2m 70cm base antenna. · Tri-Band 6m, 2m, 70cm Yagi Antenna Built from Old TV Antenna - How to build a ham radio 6 meter, 2 meter and 70 cm tri-band yagi antenna using You'll find more plans and free yagi antenna design software on the internet. This is our latest antenna featuring coverage in a single antenna - 2 meters, 220MHz, and 70cm. Typically, when I do my research on a piece of equipment I'm looking for I tend to go with the majority of HAMS. 5 MHz, and within 0. Homebrew cavity resonator/duplexer for 2m repeater There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. Authentic N9TAX VHF/UHF Slim Jim J-Pole For HT 2m 70cm Antenna 10' Coax. Arrow Antennas - pictured, left--K6LCS' Arrow Antenna Mods. Diamond antennas make great vertical antenna for 2m/70cm/6m, High gain antennas made from the best materials made to last and the market leader in ham radio antennas,We sell Diamond Anteenas at the best prices with large stocks and fast wotrldwide delivery. The take-off angle will not be any lower and the longer antenna brings along more lobs in the antenna pattern which are divided many times so they tend to be weaker. It mounts on a mast (not supplied) from 1. My next project will be either a 2 meter band version of this or a 3 element beam of this 70cm band Quad antenna. 13 thoughts on " 2-Meter Sleeve Dipole " KM6RSZ on February 12, 2019 at 4:29 PM said: Between this design and others, it does not seem to matter whether we use 1/2″, 3/4″ or 1″ pvc as long as the length of aluminum tape strips are accurate. The resulting antenna has the same strength as a one piece structure. More details/specifications on these antennas can be found on our website. I need to think what I “need” more at the moment. > Rob the elements off the antenna, cut them to length and mount your > gamma match to it with a appropriate sized reflector. Shop for 2 Meter Antennas here. In the end I opted for a new much larger tri-band antenna for 6m/2m/70cm but I will fit the glass-mount at some point and see if it can be adjusted to be as good on 70cm as it is on 2m. See Fig 22. The antenna is no longer two dimensional, but you do have two bands with one feed line and auto-matic band switching. Since we position antennas the highest we can, there must be a conductive element that acts as a reflective ground. The same vendor also supplies a Watson 4m half-wave vertical claiming "3. The entire antenna can be built for less than $50. Ground-plane Antennas for 144, 222 and 440MHz For the FM operator living in the primary coverage area of a repeate r, the ease of construction and low cost of a 1/4-λ ground-plane antenna make it an ideal choice. We stock a range of dual band, 70cm, 2m & 10 meter ham radios antennas. Enter the desired frequency and select the wavelength. After many requests for a dual band version of this antenna. 5 across the entire 2 meter band and can also be used on 70cm as that band is a close third harmonic of the 2 meter band. Read the Omni FAQ page. Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites. Homemade vertical dipole for HAM 2 meter and 70 cm bands. 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. diy collinear. See more ideas about Ham radio antenna, Ham and Hams. The "the Hairpin Match" is a simple and easy way to fix this problem. THE (VHF) DIPOLE ANTENNA At VHF and UHF, most antenna systems are derived from the dipole or its complement, the slot antenna. PVC Ham Radio Antenna "The picture is an Amateur (Ham) Radio antenna that is about 90 percent PVC pipe and fittings. World's Largest Supplier of Amateur Radio, Ham Radio, and Communication Equipment. 99 *MSRP(Manufacturers Suggest Retail Price) in U. Covering 144 Mhz - 146 Mhz and 430 Mhz to 440 Mhz. Ham Radio Projects By Csaba Yo5ofh. Jerry, K5OE: Home Brew Amateur Antennas. It is inversely proportional to the frequency which means the wave with higher frequency will have shorter wavelength. A single antenna can cover the entire amateur 2m/70cm allocation with more than acceptable SWR. 2 meter ham radio antennas car. All information, images, and documents on this website are the sole property of Cushcraft Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from Cushcraft. 70cm Band 10 Element Base Station Yagi Center element insulated from ground Product Diamond Antenna A430S10. The base impedance of this antenna was typically 17 ohms on 28 MHz resulting in an indicated SWR of around 3:1 at resonance. Premium quality anttennas for two bands. In a short vertical antenna the Earth current = Antenna current. Due to its small size, you may be able to plant your whip in the garden without drawing attention to it. I have constructed many J-antennas along this line and have used stainless steel rod with lucite braces for a bicycle mobile application obtaining superb results. The photo to the right is an example of how the antenna may be supported with minimal holes or damage to the wall. The design is by John VK2ZOI, who has excellent documentation and a step-by-step construction guide on his website here. Many improvements have been made since my original article "Omni-Gain Collinear for 70 cm and 23 cm" was first published in the May 1982 issue of 73 magazine. Many of us have been waiting for a practical 70cm solid-state amplifier design. No-compromise yagi for 2m and 70cm, consisting of a 3-element yagi for 2m range and a 6-element yagi for 70cm. then use an antenna tuner to TX outside of the 2:1 or less band-width. 8 to 1296 MHz. HTEK Dual-Band 2m/70cm Yagi - OUT OF STOCK. HTEK Dual-Band 2m/70cm Yagi. 2 Meter Jaden. 00 and is less than 1. Hands down best 2 meter base vertical antenna. 1:1 SWR Homebrew 70cm band antenna I'm using the same design for a dualband 2m/70cm attic groundplane, performs great but I do not know the SWR. It can be built for around $15-20 (1999 dollars). 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. 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). Type (2m) 1/2 wave. All information, images, and documents on this website are the sole property of MFJ Enterprises, Inc. The 2 meter J-Pole works great on the 70cm band as a dual band antenna, but sometimes you may want a 440MHz dedicated antenna. Copper Talk » Ask The Tech » Antennas Ask The Tech » Antennas « Previous Next » Thread: Last Poster: Posts: Pages: Last Post: Avanti AV-100 ASTRO Antenna. Homebrew cavity resonator/duplexer for 2m repeater There has been some interest in the club establishing another 2m repeater, but lacked a duplexer. 0 MHz region, the broadbanded antenna will. A 9 Element 2M Yagi. Get your antenna outside, especially if you are using 2 meters.