From a user standpoint, I find the small T/R DIP relay used in the control head to be a bit noisy (from a sound standpoint). 6 Element/ 11 Meter Base Antenna "Maximum Beam", Boom Length: 31' Adjustable Ga. An effective antenna is usually at least ¼ wavelength in some dimension. The performance of the antenna, through the model, will be explored in several typical settings. The article shows. SMALL BEAM ANTENNA MODEL MQ-1-CB 11 meter CB Antenna - $224. - Uses elevated radials for higher gain. 2 dBd) with a very low SWR, under 1. 85 degrees or 1. alpha antenna 10-80 meter 500 watts still in the box never opened only weights 9 lbs make for a great portable antenna as well as a base antenna. The antenna should have the shortest feasible boom length and turning radius. 65 meters or about 5 feet 4 inches above the top of the vehicle. 95 Normally $179. I also note that 40/80/160 have VSWR around 4. There was a bad ice. Using a 40/80 meter dipole usually how hams get on 160 for the first time. Aug 31, 2020 - Explore Klhadley's board "Ham radio antenna", followed by 238 people on Pinterest. This antenna is unique in that it is enclosed entirely in 3/4" PVC which makes the design a little more complicated. Get it as soon as Fri, Sep 4. CG Antenna CG-5000 Schematic. Cebik, W4RNL 80 Meter Inverted Vee From GERRY VE3GK 80/40 Super Loop Antenna 80 Meter Antenna-- Reduced Size For Small Lots: 40 Meter Antennas: 40M Shortened Loop-- By Ben Smith, W4KSY Via Antennex WB0NNI 40 Meter Linear Loaded Vertical. Element inventory: (All element aluminum is 6061-T6) 2 X 1. There was a benefit to the losses of the tree and mast. J Pole Antenna 6 Meter - 16 ft RG58 coax - PL259 connector & 150 Watts PEP. Make note of the frequency shown on the 259B. Resources listed under 40 Meter Antennas category belongs to Antennas main collection, and get reviewed and rated by amateur radio operators. A 15-Meter Beam On A Budget QST February 1971, pp. The MA5B, Compact HF Multi-Band Beam Small Footprint -- Big Signal MA5B, Cushcraft’s multiband HF antenna provides 5-Band operation in a package small enough to mount to a tripod. The article shows. 999MHZ $1,699. ) Listing on the vertical is still very noisy. A simple B expression for this coupling coefficient results if we define the useful concept of beam solid angle:A so that :. 5-Band, 1/2 wave rotatable dipole for 40/20/15/10/6 meters This is the compact dipole used for HF communications on the set of the ABC Television show “Last Man Standing” with Tim Allen. The MA5B is a design that does not sacrifice ruggedness, performance and power handling for size and ease of. The 2 el Optibeam antenna for 40/30 Meters is installed on this tower. 12m extension (24 MHz) for converting a DXBeam 6 el. On 40 meters, for example, a¼-wavelength vertical antenna is a metal tube or wire 33 feet high. The Antenna Farm : HF/6 Meter Beam Antennas - VHF & UHF Mobile Radios Radio Accessories VHF & UHF Hand Held Radios Antennas Mobile Antenna Mounts SWR/Power Meters Adapters Coaxial Cable Two Way Accessories Antenna Accessories DC Power Supplies Coax Cable Accessories Connectors Aviation Radios Repeater Systems Towers & Accessories Duplexers Diplexers & Triplexers VHF & UHF Base Stations Base. This page contains construction details on a 2 metre 144MHz VHF Yagi beam antenna, designed for portable use. It has a PCB outline size of 27,3 x 27,3 mm. The crowded space above the set required a compact multi-band dipole, and the CHV-5X was selected to solve the problem the minimal space presented. It is vertically polarized, take off angle is less than 30 degrees. 250 wats Length 2,13 mts. Best prices, in stock. The Active / Powered Iridium antenna RST740 is designed for Land and Maritime applications specifically for use where long cable runs are required to reach between the required antenna location and the terminal. Make note of the frequency shown on the 259B. A simple, compact and effective antenna for 50 Mhz. 2051 34" An Oi Code Ill for 40 meters: (The to I points are 7. 80/40 Meter Attic Antena I live in a tightly packed urban neighborhood without much room for antennas. anything but the J pole. ” 160, 80, 40, 20 m, VP9/W6PH: “I had the same expe-rience with W1HIS from Bermuda. 22 m), and at the ends of the antenna the spacing is close to 9 feet (2. 0 • F/B ratio (dB): 15. Element inventory: (All element aluminum is 6061-T6) 2 X 1. 40 35 3O--0. The radar sensor is 26G high frequency radar level measurement instrument, the maximum measurement range of up to 70 meters. Report # SMP-AM-FW2020-0820. I was not very hopefull, because the attic has metal wiring and vents, and also because it is covered by a slate roof. City dwellers sometimes find it difficult or impossible to erect full-size antennas for the lower ham bands, so there is considerable interest in more compact alternatives. Design goals • Some forward gain • Good directivity (high F/B and F/S ratios) • Relatively small size • Good Bandwidth (min. The SF-402-A is a heavy duty, smaller 2 element beam for 40 Meters - SMALLER than the Mosley S-402-M - but still has BIG performance! The SF-402-A is on a 14 foot boom and is less than 48 pounds assembled!. High Performance Transmitting Antennas for 160 Meter DX. We must subtract 4% of the total full wave length if we are using insulated wire. Basically, a moxon rectangle is a 50 ohm two element wire beam antenna. It is the first wire beam antenna offering a continous coverage between 1. K7EFX Multiband "3-Half-Wave 6-Meter" & "Half-Wave 17-Meter" Rotatable Antenna The purpose of this build was to replace my 12/6-Meter inverted-vee with a rotatable antenna PY3FBI's 20, 15 & 10 Meter Cubical Quad Beam Antenna An antenna installed at a camp in Brazil. TAK Antenna. Product Title Uniden PRO505XL 40-Channel Bearcat Compact CB Radio Average rating: 4. P Front to Back Ratio: 12 to 17 dBd Input Impedance. 2 elements monoband beam for 40 meter. Birkner, Herman J. Sirio Antenna Boomerang A 27-28. In SSB the D2T supports 1kW PEP in HF and up to 500W PEP in VHF. For the case of Jupiter, the antenna configuration will only change every few years. The tower height is 72 ft, with a 2" OD 24 ft mast, extending 17 feet for antenna mounting. There was a bad ice. It is a directional antenna that provides great performance and does not require a full scale, expensive tower. So what do M2 6M antennas do in the 50. 875GHz (2dBi) compact omni-directional DMt Indr White Antenna Direct-mount JW017A 1 AP-ANT-40 dual-band downtilt omni-directional 4dBi 4 element MIMO Ceiling Mount 4xRPSMA Pigtail Antenna Direct, using pigtails JW018A 1 AP-ANT-45 dual-band 90x90deg 5dBi 4 element MIMO 4xRPSMA Pigtail Antenna Direct, using. The beam edge for an outside antenna with moderate gain is about ±45° off center (a 90° beam). Been working DX I could never hear before. 110 - Indoor Compact Loop Antenna for 80m. 1-3 Antenna viewing a small thermal source Equation 3. Top choice Cross - Plus VHF Contest and EME Yagi antenna. The beam uses a driven element and a director element. Attic antennas •Many types of antenna can be mounted in the attic IF you don't have Radiant Barrier (Tech Shield). I chose the five-band model (20, 17, 15, 12, and 10 meters) with an optional 6-meter kit and a BAL-8 balun kit. Birkner, Herman J. Antenna Launcher category is a curation of 14 web resources on , Pneumatic Antenna Launcher Plan, K6JCA Pneumatic Antenna Launcher , Slingshot for wire antenna setup. 5-meter dishes or any mixed combination) occupies less than seven square meters, uniquely enabling flexible deployment in areas with limited. - Assembled in 20 minutes by two persons. I got to thinking of putting up some sort of directional array, especially to beam to Europe. 109 - Coax Inverted-L Antenna for 80m. Table 1 includes the gain, F/B, source (feed point) impedance, and SWR for this beam across the 20M band. We know the antenna will load up on 80 and 40 through 10 meters and that the maximum gain is acceptable on all the bands. About 3 dB less gain compared to a 'grown up' 3-element beam - that's half an S-level Fits on any town house without penetrating the air space of your 'dearest' neighbour. If the half-power beamwidth of the antenna is not large enough to cover the equipment under test, then one of the following should be performed:. The antenna features taper swaged, seamless aluminum tubing for maximum mechanical reliability. Linear-Loaded Dipole for 7 MHz - A short but efficient dipole for 40 meters band Moxon Rectangles for 40 and 10 mt. The MA5B is a design that does not sacrifice ruggedness, performance and power handling for size and ease of installation. The voltage alternately causes the diodes connected to the antenna elements to. Beam Width 1. So how do we shrink the length and maintain most of the performance and efficiency. That is about as high as most of us will ever deploy an antenna. Smallest 40 Meter Beam Antenna 40 meter 2 element beam Yagi (7 MHz). The Moxon antenna was designed by Les Moxon G6XN and is an optimisation of an earlier Australian design for a compact 2el beam. We can also provide you with custom settings to suit your operating preference such as peaking your gain and F/B in the CW portion or the Phone portion of the band. That's what I did in August of 2009. Choose from top-brand HF Yagi, HEXX beam, and other rotatable antennas to meet your high-frequency needs. MAKE ALL LENGTH ADJUSTMENTS IN THE HORIZONTAL LEG OF THE ANTENNA. Not the best but a level that would allow me to run coax from the 4:1 balun to my K3’s internal antenna tuner without too much loss. I’ve come up with. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. 80 Meter NVIS Antenna - Don't Get Hung Up on Theory Watch the following video to see how to build and erect a basic 80-meter NVIS antenna. Prepare the antenna's boom from two pieces of 3/4" CPVC plastic plumbing. 30-meter performance was down somewhat from the standard 3-element monoband antenna--within 1/2 dB in forward gain and a good F/B of 20 dB. Hex Beam 6-band antenna (10-40m) Hex Beam Compact 6-band antenna (10, 15, 17, 20, 30, 40) Hex-Beam (Hexagonal beam) antenna is a nice and compact multi-band antenna. After playing with various designs and ideas, I decided to build a base loaded vertical antenna with 2 radials for use on all the bands from 6 to 40 meters. In essence, it's a two element five band antenna. About 3 dB less gain compared to a 'grown up' 3-element beam - that's half an S-level Fits on any town house without penetrating the air space of your 'dearest' neighbour. The antenna is modeled using the EZNEC 1 package, built upon the NEC 2 engine. It was mighty tough coming up with a taper schedule for a full size 40 meter beam with the parts I had on hand. Positive displacement flow meter with flow range from 0. To sum up we will have Moxons for 40, 20, 17, 15, and 10 meters. 65 meters or about 5 feet 4 inches above the top of the vehicle. (S) Mosley TA-53-M, 5 Band Beam. It needs a balun transformer 2. 40 meter band antennas projects category is a curation of 209 web resources on , Helically wound antenna for 40m, The 40M Extended Double Zepp, Shrunken 40 Meter Phased Quads. I really wanted to turn these into a full-size 2 element 40. It’s working very well for me – have worked as far away as the Lesser Antilles with 5 watts – almost 4000 miles, so I know this antenna is getting out. (S) Hy-Gain TH3jr Tri-band HF 3 element beam covering 10, 15 and 20 meters. HF Beam antenna, 40 metres, 2 elements, Discoverer Series. 0 • F/B ratio (dB): 15. FULL WAVE ANTENNA M103HV Dual Maximum Beam 2 Beams on 1 Boom ® 10-11 Meter Vertical/Horizontal Beams available in 3, 5, 6 and 8-element versions. The antenna is tuned for 3. 7 feet in length, which is called a quarter-wave. P Front to Back Ratio: 12 to 17 dBd Input Impedance. [20 meter V beam testing from Pasco, Washington. If you have a good downconverter, low noise pre-amp and circular feed and can hear AO-40 on a small eliptical dish (Primstar), all you need to track AO-40 remotely is a simple TV rotator. High Performance Transmitting Antennas for 160 Meter DX. SMALL BEAM ANTENNA MODEL MQ-1-CB 11 meter CB Antenna - $224. Concepts to Consider •Looking at small size 30 – 40 meter version •Standard 40 meter is 42 ft in diameter. 95 Issue 3, p46. It's an 1/8 wave vertical on 160 meters also. /cq43ax101/Helical_Beam. Transceiver and associated equipment. 1 “tube” of. They can be highly effective as well as portable. 800 (lowest 160 meter frequency in MHz) = 558 feet. (I am not sure most of these shortened antennas can handle legal limit AM power. Then the antenna mast I installed as a replacement fell down in a snow storm. I support the feedpoint on a push-up painters pole on the rear of an RV trailer and drape the wire over a nearby tree branch. The 80-meter dipole is set for 3. 1 dBd in 1972, yet it is small compared to a beam. To keep things small, we use a 7. After all, mounting a 40 meter antenna one half wavelength above the ground would place it at 69 feet. 8 ft) antenna delivers exceptional performance for transmit/receive and receive only applications for C-band and Ku-band frequencies. They are small by our standards but still a reasonable performer along with being economical. DESIGN GOALS. One big consideration was weight, 4 cage dipoles for 40/30/20/10 uses almost 1,000 feet of wire. The 40 meter 2:1 SWR bandwidth effectively covers the entire band. P Front to Back Ratio: 12 to 17 dBd Input Impedance. antenna, a new 3. equal to a 3 element tribander, JH1FCZ reported 5. 3 MHz) 10 meters ( +/- 28. Smallest 40 Meter Beam Antenna 40 meter 2 element beam Yagi (7 MHz). Download a copy of this article Understanding Antenna Gain, Beamwidth, And Directivity. zip: 108 Kbytes: Charles Gizmotchy Maco wind load. 00 shipping. Along with all this heavy iron (er, aluminium), we have dipoles for our low bands, 160-, 80-, and 40-Meters. Bazooka Antenna Design — from WE6W Beverage— a short beverage design by K3KY Broomstick Special: — compact, easy-to-build. These commercially available loop designs are AMAZING from 30 meters upwards, but to keep them a handy size, they are too small to have high efficiency down on 40 meters, though they are usable down there. Elements made from 35 to 12mm tube. The voltage alternately causes the diodes connected to the antenna elements to. 5 kg) and has a wind load of a mere 4. Choose from top-brand HF Yagi, HEXX beam, and other rotatable antennas to meet your high-frequency needs. The original antenna was designed as a moderately short antenna for the 10 meter band. MFJ Enterprises Original MFJ-1778M G5RV Junior Wire Antenna 40-10 Meters, 52 Ft Long. Design goals • Some forward gain • Good directivity (high F/B and F/S ratios) • Relatively small size • Good Bandwidth (min. uk 01922 414796, for all your HF Beam antennas and accessories needs. The beamwidth between 3 dB points is 35°. I chose the hexagonal beam antenna because of its compact size and five-band HF coverage from 10 to 20 meters. on 20 and 10 meters respectively. High Performance 40 Meter Transmitting Antennas High horizontally polarized dipole at least 70-100 feet high easily provides 6 dB of ground gain – for free! 4-Square array of phased 33 foot verticals with 30-60 radials. This antenna is fixed in direction, roughly 25/205 degrees. The mid-sized 34-meter antennas come in two varieties: a high-efficiency antenna, and a beam waveguide antenna. front-to-rear, F/R), gain (in the forward direction), feedpoint impedance (hence, SWR bandwidth), and side-lobes These characteristics depend in a complex manner on design parameters such as spacing between the. Smaller Backyard Revised 40 Meter Beam. Perfect SWR on a built Cross Yagi PA144-CROSS-20-6BP. Many RASON members truly enjoyed last month's collinear antenna. Linear-Loaded Dipole for 7 MHz - A short but efficient dipole for 40 meters band Moxon Rectangles for 40 and 10 mt. While this antenna is designed for VHF two-meter operations, it can easily be redesigned for other frequencies like 1. Kind of pricey, but SteppIR makes a very small 40 to 6 meter rotatable. The 2 el Optibeam antenna for 40/30 Meters is installed on this tower. We use some simple software designed by Dan Maguire, AC6LA, which was first published on L. 40 meter Delta Loop Joe on 21st Oct 2016 I recently purchase a 40 meter Delta Loop from Chris and received the antenna few days later after the purchase, I hung up the antenna in less than one hour in configuration, C , I hook up my antenna analyzer after the installation and I was Very surprise is flat 1:1 on the entire 40 meter band, 20 meter was about 1:2 on the top edge of the band and the. Report # SMP-AM-FW2020-0820. 5Mhz Base Antenna 3. 20, 17, 15, 12, 10, 6 meters or any combination: Antenna elements: 2 per band: Gain (free space) Peak Approx. It's an 1/8 wave vertical on 160 meters also. 60 meter loading coils (50 feet/antenna length) $20. Antenna Round Up — antennas for 6, 10 & 2 meters Antenna Theory 101 — antenna tutorial from KD4SAI Antennas from K5DKZ Antennex — online antenna magazine Attic Antenna — trap dipole design for your attic. A 46 ft multi band antenna for small gardens that works well on 80 meters Main bands (@~50 ohm) are 80m / 40m / 30m / 17m / 15m / 12m Other bands (see text): 20m / 10m 38 ft (11. 0 m diameter antenna. 25:1 to match the 20 ohm impedans at the loading point. They have an antenna for the higher bands which can be used with varying success on 160. Most of us humans think an element that long is difficult to build an rotate much less keep up in the air reliably even for a single winter. That saved me from running twin lead to a nearby remote antenna tuner. HEXBEAM SP7IDX TECHNOLOGY it ideal for Your DXpedition , IOTA – SOTA activation …. 040 MHz crystal in a modern HC-49 holder. 5 SWR, calculations showed this would require a cage of almost 6 inches. I have one and it works well but a better testimonial is a ham about 10 blocks away with the same antenna and he is on DXCC Honor Roll. ARRL Product Review of the M2 6-Meter HO Loop Antennas. Antenna size This is not a small antenna! It is 29. Vertical Antenna: On 144. 025 music wire (tube usually has 5, 3ft rods. 1 It looked like the type of antenna I wanted to try on 2 meters, small and with some gain. I had an LNR 40 through 10 meter end fed tuner and I liked the antenna, but it was a bear to tune. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. UB640 - VL1-1; UB640 - VL1-3; UB640 - VL2-3; UB640 - VL3-4; 2 Elements Yagi 6-20 meters; 2 Elements Yagi 6-40 meters; 3 Elements Yagi 6-20 meters; UB20-MX - 3 Elem. 40 meter band antennas projects category is a curation of 209 web resources on , The 40M Extended Double Zepp, Shrunken 40 Meter Phased Quads, G5RV Beam. The large diameter yields broadbanded coverage of the 80 Meter Band. 57 / -3dB beam with (H/V) = stacking distance in wavelengths. If one is interested mostly only on 40 meter working, he can think of a loop antenna. Best results are obtained with the NEC-4 engine. A low cost self supporting 40 foot (12 meter) mast can be made from a common 50 foot (15 meter) telescoping guyed TV mast. 160 meter loading coils (131 feet/antenna length) $25. So in this case, we want to build an antenna for 6 meters, 50. City dwellers sometimes find it difficult or impossible to erect full-size antennas for the lower ham bands, so there is considerable interest in more compact alternatives. On the control box, sq. Antenna Models. • Elements were folded toward each other at about the 50% point (1/4 wave spacing required!!). The antenna positioner provided azimuth over elevation over azimuth rotation of the antenna. Insulating Guying provided for boom and elements (longevity more than 25 years): see pictures. If you have a good downconverter, low noise pre-amp and circular feed and can hear AO-40 on a small eliptical dish (Primstar), all you need to track AO-40 remotely is a simple TV rotator. Smallest 40 Meter Beam Antenna J Beam Project 2 Meters and up N3SDO. The beam edge for an outside antenna with moderate gain is about ±45° off center (a 90° beam). 0 m antenna at 6 GHz is moved 1. MFJ Enterprises Original MFJ-1778M G5RV Junior Wire Antenna 40-10 Meters, 52 Ft Long. 40 meters antennas are a bit large as verticals but dipoles for 40 meters are quite manageable. 2 elements monoband beam for 40 meter. (S) Cushcraft A627013S, 6 meter / 2 meter / 70 cm triband antenna. We can always build a compact 160 meter antenna for those bands. My HexBeam made by K4KIO mounted on a 48 foot HDBX series freestanding tower replacing the cubical quad that was destroyed by ice twice!! The Quad is no longer in service, but I will keep the. My comparison antenna is a 40 meter EDZ at 60 ft and very close to resonance at 3. 110 - Indoor Compact Loop Antenna for 80m. HEXBEAM SP7IDX TECHNOLOGY it ideal for Your DXpedition , IOTA – SOTA activation …. Antenna Masts. MB17 10/15/20/40 is every contester’s dream quad-band trap-less yagi with compact design, - high power handling, - large bandwidth thanks to our trap-less solution and with the usual Momobeam mechanical trustworthiness You don't need to look any. 270 MHz the SWR was 1. anything but the J pole. The original antenna was designed as a moderately short antenna for the 10 meter band. The MA5B is a design that does not sacrifice ruggedness, performance and power handling for size and ease of. Side and back rejection fell into normal parameters of a beam of this particular design. 40 meter band antennas projects category is a curation of 209 web resources on , The 40M Extended Double Zepp, Shrunken 40 Meter Phased Quads, G5RV Beam. Apex is at 24 feet, and the ends are at 6 feet. the lower ham bands, 40 through 160 meters, few of us will have the opportunity to install antennas that are more than a small fraction of a wavelength above ground. Antenna Models. To sum up we will have Moxons for 40, 20, 17, 15, and 10 meters. 10,15,20m: $629. The beam must show less than 1. On the control box, sq. It is configured as a rotating dipole on 30 and 40 meters. This antenna is fixed in direction, roughly 25/205 degrees. CAROLINA WINDOM® 40 Compact™ List Price $189. 5m) 24 ft (7. After all, mounting a 40 meter antenna one half wavelength above the ground would place it at 69 feet. zip: 108 Kbytes: Charles Gizmotchy Maco wind load. Birkner, Herman J. The MA5B is a design that does not sacrifice ruggedness, performance and power handling for size and ease of. Ending Sep 11 at 11 11 METER CB RADIO ANTENNA BEAM OWNER MANUALS, WITH SCHEMATICS ON CD,,,,, Small Beam Antenna - MaCo Y-Quad - Dual Polarity. ARRL Product Review of the M2 6-Meter HO Loop Antennas. 5 GPH through 40-660 GPM, measures viscous liquids. There's nothing magical about it - it works as any two element beam would, but having five or even six bands on one beam is very convenient. 14 for source antenna temperature can usefully be interpreted as the average brightness temperature of the source T times a coupling coefficient less than unity. Small 40 Meter Beam Antenna November 29, 2018 - by Arfan - Leave a Comment 20m mini yagi beam the tak tenna review restricted and limited e hf hy gain make a 10 or 20 metre yagi beam antenna in your attic equipment for portable hf operations. 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. Cushcraft Compact HF Multi-Band Beam10-20 Meters, The MA5B, Compact HF Multi-Band Beam Small Footprint -- Big Signal MA5B, Cushcraft’s multiband HF antenna provides 5-Band operation in a package small enough to mount to a tripod. TAK Antenna. , pg 85 Antennas, 60 Meter Mobile on a Budget, Alber (WA6CAX), CQ 2003, Nov. The 20-meter version can be used on 80 through 6 meters, whereas the 40-meter will work well on 160 through 6 meters. At high frequencies, ham radio antennas can be fairly large. While this antenna is designed for VHF two-meter operations, it can easily be redesigned for other frequencies like 1. Make Offer - NA4RR HEX BEAM, HF Antenna, 6-BAND, 6/10/12/15/17/20M. 12m extension (24 MHz) for converting a DXBeam 6 el. The new design had a boom length of 48 feet. I started by building a 40 Meter 1/4 wave vertical using aluminum tubing, then I made a second one to Phase with the first one. Been working DX I could never hear before. My current antenna for 40/80 meters is a Radio Works Super Loop. Several designs emerged in the 1970s for reduced size beam antennas implemented by folding the elements. Multiband Wire Antennas Focus is on the Hex Beam. 14094 ~ Email: [email protected] I like to use a home made current choke to keep RF from coming back on the feedline. Prototype #2 was a "4 Band" ( 40 - 30 - 20 - 10 meters) antenna. gin with the MP -33 settings and then set the 20 meter section; and last, the 40 meter section. Antenna Round Up — antennas for 6, 10 & 2 meters Antenna Theory 101 — antenna tutorial from KD4SAI Antennas from K5DKZ Antennex — online antenna magazine Attic Antenna — trap dipole design for your attic. Horizontal Antenna. Foundation poured on July 7, 2007 Setting the 300 lb tower base in place Completed on 24-Aug-2007. SMALL BEAM ANTENNA Model MQ-1-CB CB Beam - $310. 1-16 of 159 results for "10 meter beam antenna" Radiowavz DX80PL PROline Multi Band (80/40/20/10M) Off Center Fed Dipole Antenna 1500W SSB 800W CW. The mid-sized 34-meter antennas come in two varieties: a high-efficiency antenna, and a beam waveguide antenna. 200KHz @ <2:1 SWR) • Light weight • Easy construction and tuning • Low cost. To keep things small, we use a 7. Table 1 includes the gain, F/B, source (feed point) impedance, and SWR for this beam across the 20M band. In essence, it's a two element five band antenna. Beam Antennas Vertical Antennas The antenna itself is 3. FULL WAVE ANTENNA M103HV Dual Maximum Beam 2 Beams on 1 Boom ® 10-11 Meter Vertical/Horizontal Beams available in 3, 5, 6 and 8-element versions. Small physical foot print (11 Ft turning radius) This broad band beam is the answer to your dream of a directional antenna that can be mounted on an inexpensive push up mast and in a space no larger than a garden home backyard. 00" OD, 48" long. 95 Issue 3, p46. On 160 meters you should see about 110 kHz bandwidth. 8 - An antenna system for 7, 14 and 21 Mc. - Wire Moxon Rectangles for 40-10 Meters. High Performance Transmitting Antennas for 160 Meter DX. It gives a gain of 4 dB over a dipole and the F/B is about 15 dB. They are small by our standards but still a reasonable performer along with being economical. This new antenna model operates in the following configurations : Three-element full-size yagi on the 10-12-15-17-20 and 30 meter bands; Two-element full-size moxon on the 40 meter band. This is especially so with inverted vee elements since the ends can come close to ground. Cebik, W4RNL. Table 1 includes the gain, F/B, source (feed point) impedance, and SWR for this beam across the 20M band. If one is interested mostly only on 40 meter working, he can think of a loop antenna. There is a remote antenna switch mounted at the 90 foot level. A 15-Meter Beam On A Budget QST February 1971, pp. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. Using a 40/80 meter dipole usually how hams get on 160 for the first time. The JK402 is a short boom 2 element 40m Yagi that has excellent gain and F/R. After all, mounting a 40 meter antenna one half wavelength above the ground would place it at 69 feet. This antenna is made for the DX'er thatís looking for an antenna to work across the globe. As I am interested in adding a 40 meter antenna to my antenna collection, I decided to adapt the 80 meters spiral loop for operation on 40 meters. html 43AX101’s instructions for building a two element helical beam for eleven meters; antenna including a video (40 meter antenna. 700 Did the verticals work ? Absolutely, I got significantly better reports, 3 to5 S units from various European stations as compared to the dipole and I had the same results with CA. This means that it has an internal motor to adjust the length of the antenna and the tap on the loading coil to adjust it's resonate frequency. CAROLINA WINDOM® 40 Compact™ List Price $189. Specifications • Forward gain in free space (dBi): 5. The 20-meter version can be used on 80 through 6 meters, whereas the 40-meter will work well on 160 through 6 meters. Product Title Uniden PRO505XL 40-Channel Bearcat Compact CB Radio Average rating: 4. Size of 2 x 2 1/4 x 7/8 inches and weighs approximately 3 ounces. The large diameter yields broadbanded coverage of the 80 Meter Band. In the week when we celebrates Hidetsugu Yagi's 130th Birthday we selected 5 homemade Yagi-Uda Antenna Project for the 7 MHz. 1 “tube” of. ), is a small beam that offers superior performance. What a pleasant surprise that was with the conditions being as poor as they are at the bottom of this solar cycle. Bazooka Antenna Design — from WE6W Beverage— a short beverage design by K3KY Broomstick Special: — compact, easy-to-build. YCCC Scuttlebutt #117, June 1995. 30 ft, low noise, horizontally polarized vertical with the azimuth gain of a small beam. As I am interested in adding a 40 meter antenna to my antenna collection, I decided to adapt the 80 meters spiral loop for operation on 40 meters. It is basically a mono-band antenna. This is my double zepp antenna support mast, which I use for my 15 meters modes K and T uplink, a well as on all of the HF bands. My first contact with the 40 meter portion of the beam was the Japanese Research station in Antarctica. It is the first wire beam antenna offering a continous coverage between 1. 9 - A possible 40-meter beam arrangement using quarter-wave folded elements. 20 meters wires are the highest. Download a copy of this article Understanding Antenna Gain, Beamwidth, And Directivity. Insulating Guying provided for boom and elements (longevity more than 25 years): see pictures. See more ideas about Ham radio antenna, Radio antenna, Ham radio. Within 5 days,. Cushcraft Compact HF Multi-Band Beam 10-20 Meters The MA5B, Compact HF Multi-Band Beam Small Footprint -- Big Signal MA5B, Cushcraft’s multiband HF antenna provides 5-Band operation in a package small enough to mount to a tripod. 1 It looked like the type of antenna I wanted to try on 2 meters, small and with some gain. Birkner, Herman J. The MA5B, Compact HF Multi-Band Beam Small Footprint -- Big Signal MA5B, Cushcraft’s multiband HF antenna provides 5-Band operation in a package small enough to mount to a tripod. I do not have an antenna for 160 but do listen from time to time. See lower table]. Cushcraft Compact HF Multi-Band Beam 10-20 Meters The MA5B, Compact HF Multi-Band Beam Small Footprint -- Big Signal MA5B, Cushcraft's multiband HF antenna provides 5-Band operation in a package small enough to mount to a tripod. 8 VDC 10~20 A power supply so you can power the FT-817, the Antenna & a small H. That is about as high as most of us will ever deploy an antenna. One part may be tuned for 10 meters and the other for 11 meters. 25:1 to match the 20 ohm impedans at the loading point. The performance of the antenna, through the model, will be explored in several typical settings. tion along the antenna is shown in Fig 2. Antenna Characteristics The EDZ is a 1. The two photos depict a 40 meter resonant antenna before (left), and after (right) proper matching. Max Power: 1500 Watts, Longest Element: 45'. It is basically a mono-band antenna. There was a benefit to the losses of the tree and mast. 2 out of 5 stars 67. Make an Offer. All of the other antennas were checked for interference and none was found. It needs a balun transformer 2. 5 kg) and has a wind load of a mere 4. A 35 foot pole should work well for 40 meters. The JK402 is a short boom 2 element 40m Yagi that has excellent gain and F/R. antennas: Spiderbeam 10-40m, ECO Triband Beam 10-20m, Inv Vee Dipole, 6m 4. So what do M2 6M antennas do in the 50. Eagle DX HF Vertical 40/20/17/15/12/10 Meters : Mounts Tilt Ladder Mount: Hustler: 4BTV/5BTV HF Verticals: G3-144 Vertical 2 Meter : MFJ: MFJ-1625 Window/Balcony Antenna 80-6 Meters: MP Antennas: Super-M 400 Base Base Antenna 400-500 MHz: Super-M Classic Base Base Antenna 25-1300 MHz: Super-M Ultra Base Base Antenna 25-6000 MHz: Surmen: SX- 3. We know the antenna will load up on 80 and 40 through 10 meters and that the maximum gain is acceptable on all the bands. Smallest 40 Meter Beam Antenna 40 meter 2 element beam Yagi (7 MHz). That is about as high as most of us will ever deploy an antenna. Antenna 10/11 Meter Base, Switchable Polarity 12-Elements Laser Beam. It’s working very well for me – have worked as far away as the Lesser Antilles with 5 watts – almost 4000 miles, so I know this antenna is getting out. 1 “tube” of. He commented to me that, even if a loop is only 10% efficient, that is only down 10 dB - about 1 1/2 S units. 6 Ft (20M beam), 16. It's an 1/8 wave vertical on 160 meters also. tion along the antenna is shown in Fig 2. It was a very simple concept. html 43AX101’s instructions for building a two element helical beam for eleven meters; antenna including a video (40 meter antenna. 89 : Free Shipping Special Order : AL705 : ICOM AL705: 40-10M MAGNETIC LOOP ANTENNA $289. Attic antennas •Many types of antenna can be mounted in the attic IF you don’t have Radiant Barrier (Tech Shield). It has a PCB outline size of 27,3 x 27,3 mm. DESIGN GOALS. JW011A 4 AP-ANT-20W 2. Perfect SWR on a built Cross Yagi PA144-CROSS-20-6BP. S-Meter Accuracy. Birkner, Herman J. • VK2ABQ may have been the first to publish a design with his “square “ antenna. After reading the reviews on the 4010 I thought I would give it a try. A visual observer would see only part of one. My first contact with the 40 meter portion of the beam was the Japanese Research station in Antarctica. (Half Size) Ham Radio Antenna: This project gives instruction on how to build my version of the G5RV wire antenna that is used on the 10-40 Meter Ham Radio bands (28MHZ to 7MHZ). DT2 displays a boom 2m long, the longest element is 6m long that can colapse for transport in segments 1 m long only. NOTE: SM0VPO is not Richard. This is not another article about small 40 meters antennas. Contact Info Frederick R. Ed put up the antenna at his location, and we did several on the air tests, and that small antenna does an outstanding job. The gain is approx. (S) Mosley TA-53-M, 5 Band Beam. 6 meters long and requires two tall supports, such as towers supporting rotatable yagis, preferably guyed to deal with tension in the cable "boom". The 6-band Hex Beam that Rob built operates 6, 10, 12, 15, 17, and 20 meters. [20 meter V beam testing from Pasco, Washington. The other design will place the 40-meter outer ends 1′ below the low-band dipole. 00! Wow! These guys are making some good markup! Features of the K0WA 40 meter verticle. The MA5B is a design that does not sacrifice ruggedness, performance and power handling for size and ease of installation. SS stands for Starter Series and we have one or two for each band. 5 MHz range. My current antenna for 40/80 meters is a Radio Works Super Loop. Matching 160 and 60 meters is out of the question with this antenna, so lets forget about them. Also see TV Antenna Types. Also see our 1:1 Balun and MP-1. 6 Ft (17M. Best results are obtained with the NEC-4 engine. Many RASON members truly enjoyed last month's collinear antenna. P Front to Back Ratio: 12 to 17 dBd Input Impedance. 80/40 Meter Vertical From EI7BA 80 Meter Vertical (Half length) Monopole From L. Although primarily for 80 meters, it will also function on 160 and 40 meters with a couple of additions. However, more than half of AmRRON HF communication and all of the regional communication happens on the 40 meter band and below. I have one and it works well but a better testimonial is a ham about 10 blocks away with the same antenna and he is on DXCC Honor Roll. l Below, I discuss antenna characteristics, design criteria and matching criteria for the 40 through 10 meter I-IF bands and give dimensions and construction information for several antennas. Attic antennas •Many types of antenna can be mounted in the attic IF you don't have Radiant Barrier (Tech Shield). Get it as soon as Fri, Sep 4. NOTE: SM0VPO is not Richard. - Portable Vertical Antenna for 75m and 40m makes up a compact 28 feet high antenna. Far-field data for the 34-m-diameter antenna at 8. The antenna can be fed directly with standard coaxial cable (RG8/RG58) 50ohm unbalanced, however, in most cases a 1:1 balun is used to significantly improve matching. Novel Approaches to the Design of Phased Array Antennas By Danial Ehyaie A dissertation submitted in partial fulfillment of the requirement for the degree of. 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 a 40/80 meter dipole usually how hams get on 160 for the first time. The north tower mounts a 2 meter ringo, 7 element 6 meter home brew beam, an 11 element 2 meter beam, and a 2 element 40 meter beam. antennas: Spiderbeam 10-40m, ECO Triband Beam 10-20m, Inv Vee Dipole, 6m 4. Dividing 468 by 7. It gives a gain of 4 dB over a dipole and the F/B is about 15 dB. There's nothing magical about it - it works as any two element beam would, but having five or even six bands on one beam is very convenient. The beam width is noticeably broader on the yagi than on the NB6Zep and I can use it for contacts to the NE sections of the USA. Specifications • Forward gain in free space (dBi): 5. Top choice Cross - Plus VHF Contest and EME Yagi antenna. Minor damage on boom. The 20-meter version can be used on 80 through 6 meters, whereas the 40-meter will work well on 160 through 6 meters. Dimension "A" is the height of the antenna from the base to the apex, not the length of each of the vertical wires. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. A Wire Beam Design for 80 meters. 5 element beam on 14 foot boom covering 10, 12, 15, 17 and 20 meters. • The band of 40 meters in a folded dipole above the 20 meter band. Maco antenna parts. Beam Width 1. So what do M2 6M antennas do in the 50. A Near End-Fed Antenna for Low Power 20 Meter Operation. 1 meter Compact Antenna Test Range (CATR) was designed, fabricated and installed in Taiwan. Table of Contents. Choose from top-brand HF Yagi, HEXX beam, and other rotatable antennas to meet your high-frequency needs. They are an additional expense, however, an SWR meter is necessary when any changes are made to a CB radio system, such as the initial installation, adding equipment, changing location of the radio or antenna, etc. A 46 ft multi band antenna for small gardens that works well on 80 meters Main bands (@~50 ohm) are 80m / 40m / 30m / 17m / 15m / 12m Other bands (see text): 20m / 10m 38 ft (11. 89 : Free Shipping Special Order : AL705 : ICOM AL705: 40-10M MAGNETIC LOOP ANTENNA $289. TAK Antenna. It consists of a driven element and a reflector. FULL WAVE ANTENNA M103HV Dual Maximum Beam 2 Beams on 1 Boom ® 10-11 Meter Vertical/Horizontal Beams available in 3, 5, 6 and 8-element versions. 1 lb 6 ft Open Array NXT Radar 27kg 59. Shop, read reviews, or ask questions about Garmin GPS & Radar at the official West Marine online store. Vertical antennas are based on the quarter wave. Hex Beam 6-band antenna (10-40m) Hex Beam Compact 6-band antenna (10, 15, 17, 20, 30, 40) Hex-Beam (Hexagonal beam) antenna is a nice and compact multi-band antenna. Mount the mobile antenna to a ground mounted (galvinized) vertical mast pipe, runs the RG-213/U coaxial cable and Red & Black 12 or 14 Guage wires into the ham shack through a DPDT / Center Off toggle switch to a +13. WA2TAK's Compact 40-Meter Rotary Dipole This is WA2TAK's solution to the problem of installing a 40-meter rotary dipole on a small city lot. That's what I did in August of 2009. front-to-rear, F/R), gain (in the forward direction), feedpoint impedance (hence, SWR bandwidth), and side-lobes These characteristics depend in a complex manner on design parameters such as spacing between the. 80/40/20 METER FAN MULTI-BAND ANTENNA DIPOLE 10KW CURRENT BALUN. Internal resistive bridge with LED indicator protects rig during tuneup. 1-3 Antenna viewing a small thermal source Equation 3. 75’ extension boom. They ROCK! If you are just thinking you’d like to try 6M to see if you like it, we have the 6M3SS. The unique design characteristics of this 10-160 Meter HF JPole antenna enables it to approach resonance on the major HF bands (/20/40/80 Meters), all of which presents an SWR that is low enough for external tuners to achieve a near perfect match, including 160 meters. There are many websites that will calculate the length of and length. This is especially so with inverted vee elements since the ends can come close to ground. My comparison antenna is a 40 meter EDZ at 60 ft and very close to resonance at 3. A small loudspeaker was mounted on the front of the T. Now, on top of all this we can set up the 20 meter Moxons to also cover 17 meters. This antenna is made for the DX'er thatís looking for an antenna to work across the globe. understanding of what is happening with this antenna in different “real world” scenarios and are always welcome. Boom Length (feet) 40' Boom OD (inches) 3" Number of Elements 8 Longest Element (f. While this antenna is designed for VHF two-meter operations, it can easily be redesigned for other frequencies like 1. by Rob Sherwood (SSB-06) IOTA CONTEST WINNER "OZ. 2 out of 5 stars 67. If other, more specific equations are used, the 40-Meter half square can be used without a transmatch. It consists of a driven element and a reflector. 4degree at 2 GHz for a 3. Side and back rejection fell into normal parameters of a beam of this particular design. Make Offer - NA4RR HEX BEAM, HF Antenna, 6-BAND, 6/10/12/15/17/20M. SWR meter - A built-in Standing Wave Ratio (SWR) meter isn’t essential but you will need some kind of SWR meter. 1 “tube” of. I got to thinking of putting up some sort of directional array, especially to beam to Europe. Cebik, W4RNL 80 Meter Inverted Vee From GERRY VE3GK 80/40 Super Loop Antenna 80 Meter Antenna-- Reduced Size For Small Lots: 40 Meter Antennas: 40M Shortened Loop-- By Ben Smith, W4KSY Via Antennex WB0NNI 40 Meter Linear Loaded Vertical. The beam waist (w 0), or smallest spot size, for a Gaussian beam after a lens is given by 2w 0 = 4 lambda / pi * f/d where f is the focal length of the lens and d is the diameter of the beam prior. Antenna beamwidth calculator. MAKE ALL LENGTH ADJUSTMENTS IN THE HORIZONTAL LEG OF THE ANTENNA. i accept paypal thanks. MFJ1640T Mobile antenna MFJ for HF 40 mts. - Wire Moxon Rectangles for 40-10 Meters. Small Yagi 6-20 meters; UB50 - 3 Elements Yagi 6-40 meters; 3 Elements Yagi 6-40 meters; 4 Elements Yagi 6-20 meters; 4 Elements Yagi 6-20 meters DX; 4 Elements Yagi. Transceiver and associated equipment. UB640 - VL1-1; UB640 - VL1-3; UB640 - VL2-3; UB640 - VL3-4; 2 Elements Yagi 6-20 meters; 2 Elements Yagi 6-40 meters; 3 Elements Yagi 6-20 meters; UB20-MX - 3 Elem. The crowded space above the set required a compact multi-band dipole, and the CHV-5X was selected to solve the problem the minimal space presented. (S) Cushcraft A627013S, 6 meter / 2 meter / 70 cm triband antenna. 0 m antenna at 6 GHz is moved 1. Now Premiere of NEW Two Model – NEXT Generation HEXBEAM MARK III HD® (9kg) and HEXBEAM MARK IV LIGHT® (8kg) A professionally engineered High-Quality,Heavy Duty, Light Weight, Plug and Play the six amateur radio bands 20-17-15-12-10-6 meters broadband hexagonal beam wire antenna. I chose the five-band model (20, 17, 15, 12, and 10 meters) with an optional 6-meter kit and a BAL-8 balun kit. Hence, the antenna system must be tuned, probably several times in small increments, to its final condition before the final match between the coax and the antenna can be completed. At the higher HF frequencies, antenna sizes drop to 8–16 feet but are still larger than even a big TV antenna. The 12-Element Laser is designe. /cq43ax101/Helical_Beam. The main beam is maintained at the desired 40 -degree elevation angle from broadside over the full …. Antenna Models. 2 elements monoband beam for 40 meter. This is an antenna that started out as a 2 element phased array, and grew up to be a 4 square in the Summer 2000 station rebuild. The total side to side beamwidth of the antenna main beam. A log- periodic dipole array antenna was used as the source antenna located approximately 10 meters from the UHF array. The 40 meter Stealth Vertical - Vertical antenna for 40 meters band. K7EFX Multiband "3-Half-Wave 6-Meter" & "Half-Wave 17-Meter" Rotatable Antenna The purpose of this build was to replace my 12/6-Meter inverted-vee with a rotatable antenna PY3FBI's 20, 15 & 10 Meter Cubical Quad Beam Antenna An antenna installed at a camp in Brazil. uk 01922 414796, for all your HF Beam antennas and accessories needs. This is not another article about small 40 meters antennas. 700 Did the verticals work ? Absolutely, I got significantly better reports, 3 to5 S units from various European stations as compared to the dipole and I had the same results with CA. Many RASON members truly enjoyed last month's collinear antenna. Now, on top of all this we can set up the 20 meter Moxons to also cover 17 meters. Get it as soon as Fri, Sep 4. Figure 3 shows my 4 element quad built with old Moonraker 4 parts on a 40 foot tower. •Need lots of room, keep them away from metal objects like heaters and ducts •Wire antennas can be run near the peak of the roof inside the attic, bent in odd shapes to match the space available. They have an antenna for the higher bands which can be used with varying success on 160. YCCC Scuttlebutt #117, June 1995. I have a small city lot with some HOA restrictions. A 35 foot pole should work well for 40 meters. Cushcraft A-4S Four Element Beam Antenna for 10, 15 & 20 Meters. 5 element beam on 14 foot boom covering 10, 12, 15, 17 and 20 meters. Antenna Models. 3 m), which allows for a turning radius of just 15 feet (4. The ATAS-120 antenna is a mobile whip antenna for 40 meters thru 6 meters. 25:1 to match the 20 ohm impedans at the loading point. Additionally, on a tripod mount, we have an az-el rotator containing our satellite antennas (2M and 70cm). I was quit surprised how well it did for just having 2 elements. In compliance engineering, antenna gain is measured in decibels over isotropic (dBi), referring to an isotropic antenna — an “ideal” antenna that transmits/receives energy uniformly in all directions, exhibiting a gain. 2 elements monoband beam for 40 meter. The size of the vertical element is 2 meters, so it will comfortably fit under the ceiling in the room. 0 out of 5 stars 10. (Half Size) Ham Radio Antenna: This project gives instruction on how to build my version of the G5RV wire antenna that is used on the 10-40 Meter Ham Radio bands (28MHZ to 7MHZ). Performance will vary based on your location. The frequency of resonance was measured with the Yagi at a height of 3 meters and with a tilt angle of 40 degrees. August 18, 2020. A small loudspeaker was mounted on the front of the T. I also note that 40/80/160 have VSWR around 4. Maco antenna parts. That's what I did in August of 2009. OptiBeam 40m Mono-Banders products from Ham Radio. 85 degrees or 1. Our Light Beam and Light Beam Plus antenna models are Mono-Band Antenna products that are designed for high performance in one Amateur Radio band from 20 to 10 Meters, depending on the model. With that said, go look up the cost of one that is being sold in the magazines and on the web. This month I decided to build a 2 meter 5/4 wave antenna. 114 - Six-Band Wire-Stub Trap Antenna for 40m-10m. 10/11 Meter 4 Element Hybrid Moxon Rectangle Materials: 3/ 10 foot lengths of 1/2" schedule 40 electrical conduit 13 fiberglass rods or 6 non conductive poles for each end of spreaders 2 mm/12awg bare copper wire solid zip ties nylon chord duct tape 6 u bolts 6 SS hose clamps (smallest you can find). All you need is two rabbit ear antennas from Radio Shack, two CATV baluns, four feet of 3/4" CPVC pipe with one tee, and a bit of time. 999MHZ $1,699. Kind of pricey, but SteppIR makes a very small 40 to 6 meter rotatable. Basic Antenna Theory A radio antenna intercepts energy from electromagnetic waves and converts that energy. They ROCK! If you are just thinking you’d like to try 6M to see if you like it, we have the 6M3SS. Antenna beamwidth calculator. If you can find a Moonraker 4 that has at least the Boom and hubs (that are still ok to use) you are halfway home. Positive displacement flow meter with flow range from 0. It gives you all bands between 7Mhz and 54Mhz. After all, mounting a 40 meter antenna one half wavelength above the ground would place it at 69 feet. 25 long center fed dou- blet as shown in Figure 1. 100 Watts Peak Power 40. During what turned out to be an extended tower-raising project (Going from 55 feet to 90 feet), I had my beam down and I needed an antenna that could provide the necessary gain and angle of radiation to talk to my friend Skip down at the South Pole. You take it to the top of the tower but under your 3 element beam ( which creates capacitance on the grounded side). 160 meter loading coils (82 feet/antenna length) $29. Watt transceiver. The antenna is constructed using a 4-way electrical conduit junction box and 3/4″ PVC electrical conduit as shown above. An antenna transmatch was used to compensate for the small amount of SWR found in my system. The total side to side beamwidth of the antenna main beam. Every site has one high-efficiency antenna, and at least one waveguide antenna. This antenna is for the 2-meter Amateur radio bands and will easily handle 5 watts of the average handy talkie. A 15-Meter Beam On A Budget QST February 1971, pp. Adjust length as necessary. Optibeam 40/30 yagi on a TiltPlate. 4 Meter C240M Mobile Antenna The General Dynamics SATCOM Technologies lightweight 2. antennas: Spiderbeam 10-40m, ECO Triband Beam 10-20m, Inv Vee Dipole, 6m 4. This means that it has an internal motor to adjust the length of the antenna and the tap on the loading coil to adjust it's resonate frequency. • The band of 40 meters in a folded dipole above the 20 meter band. The most common material for home building small ham radio loop antennas is common copper plumbing pipe. 200KHz @ <2:1 SWR) • Light weight • Easy construction and tuning • Low cost.