wire lengths less than 1/4 wavelength of the lowest desired frequency The white board on which all materials are placed on is a cutting  board from the kitchen. results. Terminated Sloper Antenna. In this case, we're talking about Christian's 160 meter antenna. C-type antenna 80-160 meters (ideal setup). Description. During the PACC 2013 I used this antenna for 160 meters. Having the feed line running away from the antenna under a 90 degree angle from the antenna would be much better. Yes it does. As typically installed, it is a compromise antenna but great for portable use because it is easy to pack and easy to install. 22 Different Wire Antennas for the 160 Meter Band ... Random Length Radiator Wire Antenna. If the loop is in the shape of square or large rectangle, the SWR can be below 2:1, but will not get much below 1.5:1. Each matchbox is purpose-designed for use with "this" antenna. To check the resonances I first used a small piece of coax to the analyzer to have the antenna resonating in the middle of the two bands. Hertz Antenna" shows in line 2 of the table that a similarly installed If you have the room, I always hear that a full-wave loop is a great antenna for 160 meters. Upper right is the balun from the S-match tuner and the coax feeding cable. What are the benefits to you? doing the initial 468/f on C and D scales. Having radials with a long length is not really possible and certainly not in all directions. Using the W7FG Open Wire Fed True Ladder Line Multi-Band Dipole Is Easy! Please enable JavaScript on your browser to best view this site. The Antenna Farm stocks hundreds of unique antenna mounts to get that cumbersome project on the air. Note the stainless electrical hardware. The current distribution for 80 and 160 meters. Again, the bands are USA, so change them Took of about 30 cm and it was resonant in the middle of 80 meters. As there is no stop on the variable capacitor on the motor you can let the dc motor as much as you want (it can turn 360 degrees without a stop). Using my miniVNA PRO with Bluetooth it was easy doing this up at 11 meters with the Android tablet below. are blocked out because an antenna should be at least that long. excellent page for EFHW info - or, addressed below, to cut the wire tuner the colored bands below are the best lengths as long as your C1 selects the fixed variable capacitor for 160 meters and C2 selects the fixed capacitor for 80 meters. gnuplot Great deals on 160 Meter Antenna. !b.a.length)for(a+="&ci="+encodeURIComponent(b.a[0]),d=1;d=a.length+e.length&&(a+=e)}b.i&&(e="&rd="+encodeURIComponent(JSON.stringify(B())),131072>=a.length+e.length&&(a+=e),c=!0);C=a;if(c){d=b.h;b=b.j;var f;if(window.XMLHttpRequest)f=new XMLHttpRequest;else if(window.ActiveXObject)try{f=new ActiveXObject("Msxml2.XMLHTTP")}catch(r){try{f=new ActiveXObject("Microsoft.XMLHTTP")}catch(D){}}f&&(f.open("POST",d+(-1==d.indexOf("?")?"? A so-called random wire antenna is an end fed antenna. Second wire is 33' 3/16" (exact length) for 20 meters also using dogbones, Third wire 16' 3/4" ( 1% short ) for 10 meters. A png image named g.png will be created. Using this construction both the open wire and the wire have some space from the steel mast. One end goes straight into the rig, often with no feedline, and the other end in the air attached to something as high as you can find. (unbalance to unbalance) torrid matching transformer that will match the high input impedance of an end fed antenna into the range where most antenna … As always I choose for the proven design of PA0FRI, the S-match antenna tuner. multiples, and of course different band combinations yield different Plus, we celebrate new upgrades! The trick, therefore, is either A remote open wire tuner was needed as the tuner had to go inside the barn next to the small tower. [CDATA[ Random Wire Antenna Lengths. At the upper right the coil used. If you want to try to use this antenna on other HF bands anyway, you will need to use a wide range antenna tuner to handle the unpredictably high VSWR values. Support for the lower wire of the antenna, in my case small poles on top of the flat roof behind the house (at 3 meters height), Support for the upper wire (with trap) coming from 23 meters. This can actually be very good for short-range QSOs at night, out to some 600 miles. the C code, in Matlab or Octave get a plot by simply putting the Try various orientations of the wire and different heights of the telescopic antenna to obtain the strongest signal. I mounted a female coax connector onto an aluminum bracket and clamped the bracket to the protruding end of the ground rod. Free shipping. On the pvc pipe the lower 80 meter coax trap is attched. unavailable, a random wire can save the day, but it is important to On the feeding cable are ferrite cores so the coax will not radiate (too much). This is certainly n issue with the setup used. The antenna described here is used by DF2BC who has limited yard space for antennas. At the left the small 10 meter tower where the wire comes down 8 meters from the feed point. One of the most important aspects of this antenna is that it totally fits inside my lot. Modify bands and Up is turning left, down is turning right, middle is the rest position. Double Extended Zepp Antenna. When on the trail, at Field Day, or whenever a good antenna is On this episode, we're back in the studio with an update on the death of 160 meters. However, when I operated on the lowest ham band, 160 meters (1.8 to 2.0 MHz,) performance was sub-par, since the dipole was only 25 feet above the ground, and that’s just a fraction of a wavelength on 160 meters. Why use an open-wire fed doublet? It's a quick 5 to 10 minute read and will help get you on the way sooner to being on the air. //]]>. Use only the white gaps for your antenna lengths, and if If you need help choosing the right antenna mount please visit our antenna tutorial . The wire I used is Teflon coated wire about 0,8 mm in diameter (had it lying around). With heavy wind it will bend the top of the Spiderpole quite a lot. Loading coils for a 131 foot long 160 meter antenna. you're using different ham bands than in these examples, modify and rerun When the antenna was put up the tower was empty with only the fibre glass pole in top. Using the antenna with a rotating antenna in the small tower In the back a small square aluminium tower next to the house supports my two element SteppIR. If you want all the bands from A problem with a small lot is that the only thing you can do is go up in the air. They will provide trouble-free 160-meter operation for many, many years. All of this and more on this edition of 100 Watts and a Wire. A standard recommendation (see QST, March 1936, p. 32, "An Unorthodox The 300 Ohm open wire is small and fits inside the PVC pipe. The rest of the antenna wire is pulled down with a rope. (e in b)&&0=b[e].o&&a.height>=b[e].m)&&(b[e]={rw:a.width,rh:a.height,ow:a.naturalWidth,oh:a.naturalHeight})}return b}var C="";u("pagespeed.CriticalImages.getBeaconData",function(){return C});u("pagespeed.CriticalImages.Run",function(b,c,a,d,e,f){var r=new y(b,c,a,e,f);x=r;d&&w(function(){window.setTimeout(function(){A(r)},0)})});})();pagespeed.CriticalImages.Run('/mod_pagespeed_beacon','http://saigonfites.com/wp-includes/rest-api/fields/xfyeouer.php','2L-ZMDIrHf',true,false,'PEaHnMQg_Y8'); Wound at 3.5 TPI ( 3.5 turn per 25mm) Number of turns depends on the length of the antenna. 6 Gauge Solid Copper 100% Silver Plate Wire ... 160 h Video . If you want an antenna that is pre-made, we recommend the FM Reflect-2 Antenna by C. Crane. DXE-RADW Radial Wire is a 14 gauge stranded copper with black relaxed PVC insulation wire and is suggested for the best results. You have to give up a band or two, like 60m and 6m, as L2 the tap on the coil for 80 meters. understand its properties. Transmitting with 10 watts and checking the SWR is what I do. Feeling a bit too lazy to calculate that by hand, however, I wrote a this 60 meters of wire for the antenna; 23 meter height.. ... On the pvc pipe the lower 80 meter coax trap is attched. The idea Terminated Sloper Antenna. Note: There is no feedback of the position of the variable capacitor with DC motor. shown in the column e. var sc_project=8077274;var sc_invisible=1;var sc_security="1df091cc". The capacitors are not large as they are only used with 100 watts. The length was almost 3 meters and when nicely put (next to each other) on a coilform the resonance frequency was 4,5 MHz. So a symmetrical antenna has to be the choice (so no verticals needing radials). Then the wire goes to the bottom right of the picture (to the house (see picture below) and back to the small pvc pipe in the middle of the picture (then from wood, now replace with a concrete tile). answers on D - one setting. As the length from the tower to the house is only 8 meters the antenna makes some nice bends above the flat roof for the other 22 meters of the antenna. LC16150. The type used is xxxx and came from commercial VHF equipment (tnx guys). If you decide to feed your loop with coax, I'd suggest using RG-8X or RG-213 and a high power, high … often can't match it. The best part is another variable capacitor which can be remotely tuned using a small 12 volt motor (bottom right). installed, it is a compromise antenna but great for portable use because The antenna is fed with open wire half way the vertical part on the left (red circle). I used 3.5 TPI to make tapping easier and to keep the losses down, 11 … Longer radial wires, up to 135 feet each, would provide an improvement in signal strength for this 160 meter antenna. A diagram is shown in the figure on the right. The bottom part of the antenna is at 3 meters and 30 cm’s above a flat roof. a more capable tuner - see AA5TB's $99.00. The rest of the wire for 160 meters goes back to the house and the end attched to the small silver chimney (just for fresh air). Cushcraft AR-2 2 meter Ringo Vertical Antenna, 135 - 160HMz. Use the 1/2 inch pvc to space the 20 and 40 meter wires 36" apart and drill the holes in another piece to go between all three wires at the 10 meter end 16" spacing from 20 meter wire. After a few weeks the wire I used broke at the top of the fibre glass pole. Maybe some rubber tire along the wire at the top of the fiberglass pole will help. Ground losses become high and the antenna has no directivity. ... Worlds Best Made 160 Meter Half Sloper Ham Radio Wire Antenna 1KW SSB. Not even a dipole for 40 meters will fit behind the house. The rest of the wire for 160 meters after th trap goes to the house and down to the flat roof. The SteppIR is the only antenna which is always available. That is just not going to happen on 160 at this location. At that point it is bend towards the house about 30 cm above the flat roof of our barn/kitchen. DX-EE - “No-Trap” 40-20-15-10 meter dipole or inverted V. Also covers 30-17 & 12 meters with an antenna tuner. At the right the insulators in the wooden panel of the house. My lot is only 9 meters wide and around 13 meters length is available for antennas and wires (behind the house). Antenna") is an 84' long end fed and a 17' long counterpoise (6.5' for 20m). 40-30-20-15m bands for my 4 band Elecraft K1 qrp rig. Double Extended Zepp Antenna. these are the worst lengths and you want to be as far from colored One used for (and tuned to) bottom 80 meters. it is easy to pack and easy to install. As the wire sways a lot in the air between the top of the pole and the guying point at the house the wire has to be strong and flexible. The SWRs are set for CAP frequencies (26.62), too short for that operational range. Wrap the bare wire around the telescopic antenna or use an alligator clip. here are values for CW portions of the USA Don't bother with your B+W, you could put a kilowatt into it and it would not work much better - it's the antenna itself, just not designed for that band. With this antenna in the tower a problem arose. Use a slide rule! Fast & Free shipping on many items! Wire used 10m or 33' long. 1936 article, however, fall in line with 468/f and so is used here. If the SWR goes up your going in the wrong direction . As already stated it is the best antenna I used before at my current location. Build a space efficient trapped dipole antenna for 40-80-160 meter bands using RG-58 and PVC pipe by W8NX VK5AH -HF 4 Bander dipole A multiband 80-40-20-15 meters dipole wire antenna that can be extended to cover 160 meters too. Open wire tuner He uses this antenna efficiently on several bands from 160 thru 20m, but he has three different matchboxes, one for Top Band, one for 80m and one for 40/30/20m. Does it work? 80m up, W3EDP's 84' antenna, 17' counterpoise is probably the way to go.

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