Random Wire Antenna Tuner Schematic

8 through 54 MHz (3. MFJ-16010 Random Wire Antenna Tuner Thank you for purchasing the MFJ-16010 Random Wire Antenna Tuner. Also, does anyone here has a wiring diagram? I'm a bit confused on how to wire up the counterpoise, ground or both!. Automatic HF Tuner. It is NOT resonant. The TUNER switch on the BYPASS position will bypass the tuner and allow the VS 300A to be used as a wattmeter only. The tuner was on a window sill in my shack, and I could run up to 25W before the RF in the shack got to be too much. The MFJ-969 Antenna Tuner covers all frequencies from 160 Meters thru 6 Meters, including the "magic band" -- the widest matching range of any full featured antenna tuner. As I'm very much into end-fed antennes because they seem to work well and are very easy to erect or span away, I decided to buy the good old 70's made in USA L/C tuner. The MFJ-941E gives you a 300 Watt antenna tuner that covers everything from 1. dk have manuals, schematics or other files from. 300 Watt Antenna Tuner/Artificial Ground This unit combines a versatile antenna tuner with an artificial ground. (300 ohm twin lead is wonderful for QRP) 3. 5 meter vertical pole, with a wire attached to the top running down to the transmitter, as a radiating and receiving aerial element. (My dad put it up for me. use it for receiving only with a random wire antenna. e-mail: 1616 1616 Between 27' and 35' depending on type of line used. Thank you for purchasing the 4S-Tuner. This is a 2kw tuner. The MW550P is an active preselector and antenna matching unit for AM broadcast and 160 m reception. This means that the antenna will always have a feedpoint impedence appreciably higher than 50 ohms and will not require much of a ground system to perform adequately. 95 Your Price: $259. 5mm BLUE BLACK. Murch UT 2000a 5 to 30 mhz. Improvise an end insulator for the long leg of the antenna. Without a doubt, the PK Loop was much better at mitigating radio noise than the wire antenna we hung on the inside of the hotel window. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. The Antenna Tuner will load an End Fed Long Wire effectively, especially if it is cut to aprox. Coaxial feedlines connect to the coax connectors 1 and 2 coax lines (fed directly or through matching circuit as selected by the ANTENNA SELECTOR switch. I use my random wire on 160, 80, 60, 40, and 30M where the built in KX3 tuner matches it very well. 2 Balanced line tuners, 3. Note: Icom recommends that an experienced Electronics Technician perform this. It should do a respectable job on just about any random wire antenna. I bungee tie the Jackite to a bollard, tie on the wire to the eyelet and extend the pole. Random wire or single wire line antennas should be connected to the WIRE connector on the back of the unit. Here are some answers. Its really an impedance transformer (9:1) to feed a high impedance, end fed (unbalanced) random wire which is likely to be a few hundred ohms, and transform it into something closer to a 50Ω (unbalanced) coaxial input, hence UnUn. MFJ-16010 Random Wire Antenna Tuner Thank you for purchasing the MFJ-16010 Random Wire Antenna Tuner. I would likely have a fire, or damage equipment, if I brought a single-wire feeder into the house! With 5 or 10 watts, I wouldn't care. use it for receiving only with a random wire antenna. See how my early theoretical predictions and descriptions compare to actual field measurements of this most recent antenna theory hoax! If you think baluns at the inputs of tuners are a good idea, go to this W7EL link and read the section on current baluns. ) These tuners are generally able to match just about any random piece of wire acceptably. The balanced tuner must convert the unbalanced antenna input/output of the antenna to a balanced 50 ohms and then drive it through an impedance transforming network to the antenna system's impedance at the end of the open wire feeder. Homebrew lightning arrestor: How to make it Drill a hole in the bottom and in the lid of a 2-1/2" long by 1-1/4" dia. Page 1 MFJ-945E MOBILE TUNER General Information: The MFJ-945E Mobile Tuner is a compact tuner designed for mobile operation in cars, trucks, RV's, and boats. On 15 meters, this length is almost exactly 1/4 wavelength. An eight-position antenna-selector switch provides versatile. The VC-300D either position antenna switch lets you select two coax fed antennas, random wire/balanced line or built-in dummy load for use through your tuner or direct to your transceiver. Guess the antenna wanted to call home :-) 57 report, 100 watts, 15 Meter band, Icom 718. These are sometimes known as a Magnetic Longwire Balun. Automatic Antenna Selector Hex code switch Push button switches Circuit Central to the circuit is a microprocessor PIC 16F887 in a 40 pin DIL housing. • NOT different from any other impedance matching circuit. They can be CONDUCTED along the power leads and other wiring into the radio, or they can be RADIATED from the noise source and its wiring into the radio antenna system, and then into the radio. As little as 5 metres of copper or aluminium wire suspended and insulated at each end in a garden will make an efficient antenna. GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun is one possible solution. You can use coax cable, random wire or balanced lines. 2 What Is an Antenna Coupler Antenna "couplers" are placed at the antenna and precisely match conditions of the antenna to the feed line. A green one indicates output power with a red one indicating reflected power. (Possible subs include: J308-310, U310, 2N4857-4860. Antenna description Switcher schematics HF Ham Radio Random Wire Portable Antenna. 5-30 Ut-2000a Murch Mhz Roller Inductor Antenna Tuner 2kw (51. ) Note: RadioShack sells this antenna as a kit, catalog # 278-758, $9. 8 to 30 MHz, it will match virtually any transmitter to almost any mobile whip antenna. The operator simply transmits into the antenna and the tuner detects the transmitted frequency and selects the correct settings from memory. Antenna Input Connect the vehicle antenna Wiring Diagram FUSE When replacing the fuse, make sure new fuse is the correct type and amperage. Even though I have 3-4 other antenna tuners to use, both manual and automatic, I decided upon this one because: 1. The tuner is designed to properly load the 75 Ohm output of a transmitter into the 52 Ohm load presented by a base-loaded vertical antenna for 160 meters. The Icom AH-4 automatic antenna tuner is designed to work with select ICOM transceivers including the Icom 703, 703+, 706 MkIIG, 718, 746, 746Pro, 756, 756Pro, 756ProII, 756ProIII, 7000 and 7300. If you want to see manuals from other manufactories you can click on the manufactory menu in the left side. Description: A simple passive (no power required) circuit to match an antenna to a radio receiver. The MFJ-931 Artificial RF Ground covers HF & CB 1. With a loop antenna, I'd like to mount the antenna on the porch at night and have a remote tuner/control inside because it's very hot n humid here in Louisiana even after dark. It will match almost any random length of wire to any transmitter from 160 through 10 meters. From their website: "ZM-2 ATU (Antenna Tuning Unit) - Order The ZM-2 is a state of the art Antenna Tuning Unit. I used a random wire antenna on 80m for a while. That did not deter me. Any short antenna can be matched with this method, such as towers with or without capacitive hat, T antennas, inverted-L antennas, random wires, and so on, as long as they are small compared to the wavelength; shorter than a quarter wavelength in any case. So I don't know what that jumper statement is all. One end of the wire attaches to a tree, pole or other support, preferably at a high point. This combination works well for long wire antennas, as the random wire tuner should be at the antenna end of the cable not at the radio. Random Wire Antenna Tuner Schematic. Also, an antenna tuner is required. This antenna’s performance is hard to predict, but it’s an excellent backup or temporary antenna. Introduction and Purpose. Dave Cripe (NM0S) has designed yet another QRP kit for the 4 State QRP Group: the 4S-Tuner/Antenna Coupler. How to install a wire antenna ? (IV) After have seen characteristics of a "good" antenna in terms of length and height above ground and explained how to select an antenna and use a long wire indoor or on the balconery, let's see how we can easily install a wire antenna outdoor. Schematic Diagrams and Service Manuals; Build Mobile Apps With Zero Coding; Loop Antenna. Net weight (2. If used for transmitting, a random wire antenna usually will also require an antenna tuner, as it has an unpredictable impedance that varies with frequency. But this post is about a portable, field antenna kit. Construction. A tripod/mast is not required if there is a tree or other structure to support the antenna. The FC-40 makes use of the control circuitry built into the transceiver, which allows the operator to control and monitor automatic operation of the FC-40, which mounts near the antenna feedpoint. To see how the calculator works, click on the "Random Sample" Button. The "Ultimate" transmatch circuit was devised by Lew McCoy, W1ICP, and first appeared in the ARRL journal 'QST' in 1970. Has one balanced output for coax cable and one random wire output. Then lock them in place on each end of the pill box with double nuts. 5 meters length) to the mixer's RF input port and attempted reception using the gqrx program on Linux. Not sure if that is for balanced line and random wire tuning or just balanced line only. Even a short wire a few centimeters long will be sufficient for picking up broadcast AM stations. Switch to tune, switch in Low-z. As little as 5 metres of copper or aluminium wire suspended and insulated at each end in a garden will make an efficient antenna. With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun is one possible solution. 5-30 Ut-2000a Murch Mhz Roller Inductor Antenna Tuner 2kw (51. The battery management circuit sits on top of a plastic board which is an Akro-Mils 40150 (3. Why Antenna Tuners Aren't Necessarily Useful for Shortwave Listening by Daniel A. The rear needed the Radio input connector, and the antenna output connector, plus a ground connection and a banana plug. Drake devices were named MN-4, MN-2000, MN-2700. The transmitter should be connected to a good earth ground at its chassis, the ground can also be connected to the lower (black) banana jack on the tuner. I then connected a random wire antenna (about 2. You can use coax cable, random wire or balanced lines. The FC-40 uses specially -selected, thermally-stable component s, and. Nice to have muitiband antenna that doesn't require an antenna tuner and automatically bandswitches. The MFJ-969 Antenna Tuner covers all frequencies from 160 Meters thru 6 Meters, including the "magic band" -- the widest matching range of any full featured antenna tuner. It should do a respectable job on just about any random wire antenna. Mount the batteries in the plastic holders, wire them in series with the bus bars, mount the battery management circuit, then wire it in. Remote Automatic Antenna Tuners and the 43 Foot Vertical Figure 1 — Test setup used by the author for measuring expected tuner loss with a load that simulates the impedance of a 43 foot vertical antenna on 160 meters. NOTE: If random wire operation is desired, position the tuner. For the 11 meter band (25. net is a Web site dedicated to ham radio (amateur radio). A COMPACT ANTENNA TUNER: just attach a random wire or a half wave end fed. I used copper enamalled wire to bind the cable to the spacers. DC power is provided over the coax; no separate power cable is required. By the way, Good Will is an awesome place to get metal cases. The schematic for the EFHW tuner is shown below: Will my EFHW matcher give me a 1:1 SWR? One thing about the EFHW tuner is that it's a fixed ratio transformer, so it might not be able achieve 1:1 (50 ohm match) with all half wave wires. The name of this one is confusing. The random wire antenna is probably one of the least expensive, easiest and cheapest HF antennas to use if you have a tuner and you want to get the "most" out of a length of "random" wire without having to pull out that calculator, doing the math, getting the center insulator built or bought, running the feedline, and all the rest that goes. Ensure that the tuner is well grounded to the transmitter! A post labeled GROUND is provided for ground connection(s). Many amateur experimenters constructed crystal sets, often with the tuner inductor coil wound on a tubular box or a drinking glass. The EFHW-8010 can easily handle the 600W power output of my amp. No scientific breakthrough here. Today this is called as the random length wire antenna. I will tell you that I’ve been an A/V service technician for almost 40 years and what I have on my TVs are just wire loops (like UHF antennas) connected to a 75-300 balun transformer, connected by a 75 ohm coax cable to the antenna input to my digital TV tuner. This allows you to position the unun away from the house and then feed the antenna with coax. With the music stand “tripod” base I get the antenna feed point up. The other end connects to the random-wire connector on a suitable antenna tuner. Antenna description Switcher schematics HF Ham Radio Random Wire Portable Antenna. The wire could go out the shack window, over the house and down the garden - it will all depend upon your garden's layout. Connect any counterpoise to A2. Complete Details Before you buy, download the manual (2. I'm going to > use it for receiving only with a random wire antenna. MFJ-926B Automatic Antenna Tuner covers the entire HF band and will match a random wire or coax-fed antenna 1. The SWR meter is not in the circuit, but should be placed between the tuner and the transmitter (TX). You can use coax cable, random wire or balanced lines. CG-3000 service manual. The frequency range of the. Folding will reduce effectiveness and make theoretical analysis extremely difficult. I would likely have a fire, or damage equipment, if I brought a single-wire feeder into the house! With 5 or 10 watts, I wouldn't care. It will not (in its native form) successfully transfer power to anything else. BUILD AN HF ANTENNA TUNER MAKE A HOMEBREW HF-VHF ANTENNA TUNER (It really isn't all that difficult. (If you are familiar with the AH-4, it has a 4-conductor control wire system that integrates it nicely with most newer Icom rigs, and works well with end-fed antennas. I intended to design my homebrew antenna tuner to suit my specific antenna system situation, instead of using a more "universal" design which is a "one-size-fits-all" device normally intended to be useful in "most" circumstances, but generally only with reasonably well-designed HF antennas. This article is under construction. It is easy to construct a dipole. Antenna tuner, matching network, matchbox, transmatch, antenna tuning unit (ATU), antenna coupler, and feedline coupler are all equivalent names for a device connected between a radio transmitter and its antenna, to improve power transfer between them by matching the specified load impedance of the radio to the combined input impedance of the feedline and the antenna. The XDM260 uses one 5amp AGC fuse located in-line. This antenna wire is fed via a section of parallel-wire transmission line with 1/4 the length of the antenna wire (i. surround sound tuner preamplifier rtc-965 5. 2-Element Single Mast Wire Beam with 4 Switchable Directions. For the box I just used a metal watch case I found at Good Will for $. For example, if my half wave wire happens to have 3,000 ohms feedpoint resistance look at my possibilities. You build this device, connect the transceiver and a longwire antenna of almost random wire, and GO!!!. A picture of the whole tuner box (below) shows two antenna wires coming to the insulators on the tuning box, the one on the top is the tower shunt feed and the one on the bottom is the 65 foot random wire running across the yard at 15 foot height for 80 meter short skip within southern Calif. MFJ Balanced Line Tuner Introduction The MFJ-974H balanced line antenna tuner is a fully balanced true balanced line antenna tuner, providing superb current balance throughout a very wide matching range - 12 to 2000 ohms - and frequency range - 1. Antenna tuner for random wire/longwire So finally,my question is,can you suggest an antenna tuner schematic that works from 10 thru 80meters?I don't need nothing. match almost any random length of wire to any transmittview full info MFJ-902H is a fully functional 10 to 80m ATU and is based around the familiar T-match circuit. Any short antenna can be matched with this method, such as towers with or without capacitive hat, T antennas, inverted-L antennas, random wires, and so on, as long as they are small compared to the wavelength; shorter than a quarter wavelength in any case. MFJ-16010 Random Wire Antenna Tuner. 5 ft and 186 ft / 33 ft The entire antenna is #12 stranded insulated copper. Frequency range is 160 meters thru 10 meters. The Carpet Loop is made up of two components: A tuner, and the antenna cable itself; the cable can be either 5-conductor rotator cable or 4-conductor flat phone cable, both. Not sure if that is for balanced line and random wire tuning or just balanced line only. The ZM-2 has no inductance switching to mess with, just two variable capacitors to tune. ZM-2 with UHF (SO-239 connectors) - Prebuilt and tested. External Shortwave Antenna Input. A 6-position ceramic antenna switch lets you select 2 coax lines (direct or through tuner), random wire and balanced lines. I would like to make a simple trimmer to optimize >the 75 feet of random coated wire. Match dipoles, verticals, inverted vees, random wires, beams, mobile whips, SWL receiving antennas -- nearly any antenna. This combination works well for long wire antennas, as the random wire tuner should be at the antenna end of the cable not at the radio. Put the cap back on and recheck the SWR again on ch 40 & ch 1. Homebrewing antenna tuners is a curation of 82 resources about , QRP Random Wire Tuner, S-Match a symmetrical universal tuner , What tuners do, N4EKV. Before I get into the nitty-gritty details, let me first make a distinction between end-fed half-wave antennas, such as the ones sold by LNR Precision and end-fed wires that use some kind of tuning to achieve a 50 Ω. After attaching the leads, take some of the left over magnet wire, and make strain reliefs as shown in Fig. transceiversÚ, when used with an end-fed random wire or long whip antenna. You can use coax cable, random wire or balanced lines. Recently, I changed my call under the Vanity Call system from N5FC to N5ESE. Chameleon Antenna has been a pioneer at rethinking and redesigning portable antenna systems since almost a decade! Pushing the limits of design and manufacturing with cutting edge technology, Chameleon Antenna are known to design, manufacture and distribute products worldwide that are versatile, dependable and built to last!. Yes and no, no, no. CG-3000 automatic antenna tuner consists by power protection circuit,. When the antenna and "counterpoise" wires are arranged in parallel, as in the "Zepp", it has a 67 ft long antenna wire (84 - 17 = 67 ft). Remove the antenna cap, remove one wrap of wire and cut it off. A well-designed Z-match tuner has a high Q and is more efficient (less lossy) than other types of tuners. The following program will calculate the lengths needed to construct several popular wire antennas. automatic tuners and related products for every amateur need. radiate RF can be called an antenna. USB A Wiring Connection. (Possible subs include: J308-310, U310, 2N4857-4860. use it for receiving only with a random wire antenna. The Icom AH-4 automatic antenna tuner is designed to work with select ICOM transceivers including the Icom 703, 703+, 706 MkIIG, 718, 746, 746Pro, 756, 756Pro, 756ProII, 756ProIII, 7000 and 7300. A couple of bends won't hurt. A random wire is exactly that—a piece of wire that’s as long as you can possibly make it. Sst T Random Wire Antenna Tuner. A couple of bends won’t hurt. All-Band Doublet L. By placing the pure resistance at the antenna connector of the tuner, you have balanced the bridge for both resistance and stray capacitance of the coax patch cable and the antenna tuner (make sure the tuner is in “bypass” to the dummy load!). The following program will calculate the lengths needed to construct several popular wire antennas. Wire Antenna Calculator. The resistor is 2200 ohm in the circuit, but could also be 4k7 of 1k or anything between. As always I choose for the proven design of PA0FRI, the S-match antenna tuner. In other words, our "antenna" tuner is actually tuning the transmitter to the antenna. The MFJ-16010 is a variable L-network designed to match the low output impedance of a transmitter with the high impedance of a random wire. Farson VA7OJ/AB4OJ 1. The Antenna Tuner will load an End Fed Long Wire effectively, especially if it is cut to aprox. In other words, our "antenna" tuner is actually tuning the transmitter to the antenna. A couple of bends won’t hurt. It will match almost any random length of wire to any transmitter from 160 thru 10 meters. It should do a respectable job on just about any random wire antenna. See how my early theoretical predictions and descriptions compare to actual field measurements of this most recent antenna theory hoax! If you think baluns at the inputs of tuners are a good idea, go to this W7EL link and read the section on current baluns. A random wire is exactly that—a piece of wire that's as long as you can possibly make it. HAMBID FOR HAM RADIO, SCANNERS, DAB, SHORTWAVE & CB RADIOS The MFJ-16010 is a variable L-network random wire antenna tuner designed to It is an ideal manual ATU for the IC-706MKIIG, FT100D and FT817 and other. It is for these reasons that roughly 40 metres is a good length for an end-fed wire antenna for the 3. The circuit described a non-Icom radio to be used with the Icom AH-3, AH-4, AT-120, and AT-130 antenna tuners. 5mm BLUE BLACK. Quote:> Just bought a used MFJ-16010 ST, but there are no instructions. Plus, the EFHW-8010 can serve as a backup antenna for my hex beam on the higher frequency bands. Mfj 16010 Random Wire Tuner #1 Unit is in good condition with original box and mfj super high q magnetic loop antenna. If you are using the MFJ-16010 to match a vertical or mobile whip, the tuner needs to be at the feed point of the antenna and not at the transmitter end of the coaxial transmission line. 300 Watt Antenna Tuner/Artificial Ground This unit combines a versatile antenna tuner with an artificial ground. (If you are familiar with the AH-4, it has a 4-conductor control wire system that integrates it nicely with most newer Icom rigs, and works well with end-fed antennas. (Possible subs include: J308-310, U310, 2N4857-4860. optimal NVIS antennae, but also a broadband NVIS antenna due to the automatic frequency hoping nature of ALE. New 1 30 Mhz QRP Manual Days Antenna Tuner Tune DIY Kit For Ham Radio · New. 2-Element Single Mast Wire Beam with 4 Switchable Directions. The fixed inductor simplifies construction (no taps or rollers needed). Since my radio has an antenna jack, I used a Radio Shack male plug (1/8″) and secured one end of the antenna wire to the center (tip) connection. Random Wire Antenna Tuner Schematic. The schematic for the EFHW tuner is shown below: Will my EFHW matcher give me a 1:1 SWR? One thing about the EFHW tuner is that it's a fixed ratio transformer, so it might not be able achieve 1:1 (50 ohm match) with all half wave wires. People are experimenting with columns of salt water as antennas. The balanced tuner must convert the unbalanced antenna input/output of the antenna to a balanced 50 ohms and then drive it through an impedance transforming network to the antenna system's impedance at the end of the open wire feeder. I first tried attaching a 60 foot random wire to the antenna stud, but could not get any reading on the "Antenna Voltage" meter. L Network Antenna Tuner Schematic The only thing about making antenna tuners is in the Antenna book. A well-designed Z-match tuner has a high Q and is more efficient (less lossy) than other types of tuners. Antenna wire can be obtained at The Wireman. Drake devices were named MN-4, MN-2000, MN-2700. Work Hawaii for the very first time. I have looked through many resources and calculators to find out how long my AM radio receiver antenna wire needs to be and I am confused at the conflicting information I am getting. One end is at low impedance, so. Connect the antenna(s) to the tuner as follows: A. Youkits MT1 QRP Long Wire Antenna Tuner. Random Wire Antenna. For the box I just used a metal watch case I found at Good Will for $. for sale icom at 180 automatic antenna t: for sale icom ic 180 tuner $190. If you have already read my page describing my operating conditions, you might have understand that I regularly tune an antenna tuner at the base of a random wire with cointerpoise. Mount the board in the case using the 4-40 hardware, and you are in business. A resonant LC (or tuned) circuit coupled to a large aerial or antenna was used. 2 What Is an Antenna Coupler Antenna "couplers" are placed at the antenna and precisely match conditions of the antenna to the feed line. For these tests as a reference point, I used a CG-3000 auto-tuner at the base of the wire (typically 1dB loss through the tuner when presented with moderate load impedances), which was fed against 10 random length buried radials. Transmission lines come in a bewildering variety of species, but there are only a few basic types: parallel open lead, twin lead, and coaxial cable. An L-network random wire tuner is probably the simplest matching network in existence, yet it does a good job as long as the antenna is at least a quarter wavelength at the lowest operating frequency. A dipole requires no RF ground and no tuner, but will be good for only a single frequency. 00, Antenna Tuner & Trap Kit. And these products are affordable! Most of the tuners shown here are suitable for a frequency range from 1. Net weight (2. Operation: I use a piece of wire 51 feet long for my long wire, and a piece 16 feet long for the counter poise. match almost any random length of wire to any transmittview full info MFJ-902H is a fully functional 10 to 80m ATU and is based around the familiar T-match circuit. Go here >>> End Fed 6 - 40 Antenna For info on Random Wire Antennas - Best Length, Look here >>> Random Wire Antennas - Best Lengths. Even a short wire a few centimeters long will be sufficient for picking up broadcast AM stations. The MFJ-16010 is a variable L-network random wire antenna tuner designed to match the low output impedance of your transmitter to the high impedance of a random wire (or vice versa). Drake devices were named MN-4, MN-2000, MN-2700. The TUNER switch on the BYPASS position will bypass the tuner and allow the VS 300A to be used as a wattmeter only. Of course, results will vary depending on the actual load, but with a decent tuner, you'll be able to have fun with this simple impedance transformer with all kinds of random wire antennas. The rear needed the Radio input connector, and the antenna output connector, plus a ground connection and a banana plug. The Carpet Loop II is an ideal step upward for the listener who wants something better than a random wire but doesn't want the expensive dice roll of an active antenna. It works very well. I have a 5/8th over 5/8th vertical collinear antenna hanging in a tree at some 30 odd feet high, but I never heard anything on it, except on FM. For antenna tuners or systems with high SWR, we have a special balun. There's also an internal automatic antenna tuner module (KXAT2), which. Also, an antenna tuner is required. See text for details. On the antenna side, you can make a standard 40m antenna (prefered) or a random long-wire will also be OK. automatic antenna tuner, automatic antenna tuner schematic. This portable QRP antenna takes about 2 mintues to put up - 3 if you get the wire tangled!. Your radio receiver needs a tuner. Power handling power up to 200 watts. I used copper enamalled wire to bind the cable to the spacers. USB A Wiring Connection. It loads a long wire up an average of 50ft. This link is listed in our web site directory since Friday Dec 20 2013, and till today "QRP Random Wire Tuner" has been followed for a total of 1057 times. The transmitter should be connected to a good earth ground at its chassis, the ground can also be connected to the lower (black) banana jack on the tuner. External Shortwave Antenna Input. The front has to have the Meter, inductor switch, and tuning capacitor. For these tests as a reference point, I used a CG-3000 auto-tuner at the base of the wire (typically 1dB loss through the tuner when presented with moderate load impedances), which was fed against 10 random length buried radials. MFJs inductor switch in the MFJ-949E was custom designed to withstand the extremely high RF voltages and currents that are developed in your tuner. The MFJ-969 Antenna Tuner covers all frequencies from 160 Meters thru 6 Meters, including the "magic band" -- the widest matching range of any full featured antenna tuner. The W1SFR End Fed 35' Random Wire Antenna with 9:1 UnUn What is a random wire antenna and how does it work? The term "random" infers that you can use any length of wire you want as an antenna, while that basic fact is true, there are some practical considerations. These are normally constructed as a single turn of heavy-gauge wire (AWG #10 or larger), copper pipe or tubing and are tuned to one specific frequency at a time using a series variable capacitor. The WSPR mode is probably the ideal mode to test an antenna. CG-3000 automatic antenna tuner consists by power protection circuit,. 6 A coax fed antenna or dummy load may be connected to the connector marked BYPASS. use it for receiving only with a random wire antenna. As far as taking measurements goes, there are several antenna analyzers out there at different price points. automatic tuners and related products for every amateur need. End Fed Half Wave Antenna Coupler Schematic – 7-30MHz i would try this tuner with other specifications on 160m. There's also an internal automatic antenna tuner module (KXAT2), which. The Antenna Tuner is a 1977 HeathKit HFT-9, a small QRP size tuner of the Cap-Coil-Cap double"L" design. I was hoping there might be an Icom AH-4 Antenna Tuner expert out there who maybe knows a good way to remote the tuner with a non-Icom rig, such as a K2. MT1 is designed for consisting of two parts, namely LC matching circuit and the VSWR power detection circuit. File the ends of two 3" #20 machine bolts into a sharp point. In use this Antenna Tuner works best with a Long or Random wire antenna. The RT-100 uses the same proven technology as other LDG tuners, but is engineered to be installed outdoors near the antenna feedpoint, reducing potential SWR losses in the transmission line. The transistor can be any regular NPN type, e. HAMBID FOR HAM RADIO, SCANNERS, DAB, SHORTWAVE & CB RADIOS The MFJ-16010 is a variable L-network random wire antenna tuner designed to It is an ideal manual ATU for the IC-706MKIIG, FT100D and FT817 and other. This mistuning also increases the internal loss in the antenna tuner, wasting valuable RF power. The name of this one is confusing. Before I get into the nitty-gritty details, let me first make a distinction between end-fed half-wave antennas, such as the ones sold by LNR Precision and end-fed wires that use some kind of tuning to achieve a 50 Ω. A Broadband 80/160 Meter Dipole An easy to build single wire antenna for 160 and 80 meters with a better than 2 to 1 swr across the 80 meter band. Mfj 16010 Random Wire Tuner #1 Unit is in good condition with original box and mfj super high q magnetic loop antenna. With coax-fed antennas, the best location for an antenna tuner is where the coax feeds the antenna. 524 Kbytes. See how my early theoretical predictions and descriptions compare to actual field measurements of this most recent antenna theory hoax! If you think baluns at the inputs of tuners are a good idea, go to this W7EL link and read the section on current baluns. MFJs lighted Cross-Needle meter shows SWR, rorward and reflected power all at a glance. Complete Details Before you buy, download the manual (2. I have a 5/8th over 5/8th vertical collinear antenna hanging in a tree at some 30 odd feet high, but I never heard anything on it, except on FM. Personally, I use a slightly different antenna system for shortwave listening, where the antenna is placed much further away from the house. The back yard was non existent, but a large deck had been built on the rear of the house and it overlooked a heavily wooded creek bottom. MFJ Antenna tuners etc. With an antenna tuner, the antenna will operate above its highest included frequency,. This antenna wire is fed via a section of parallel-wire transmission line with 1/4 the length of the antenna wire (i. I almost bought one of these for around £30, but then decided to make one. Like the well known SG-230 this tuner is primarily intended to feed wire antennas or monopoles, the antenna connector is simply a high voltage connector. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced. (2) With preselector off tune receiver to a known weak but hearable signal (try the signal you have always wanted to come in better). Works very fine and is offered for sale in as is condition with no returns offered. A picture of the whole tuner box (below) shows two antenna wires coming to the insulators on the tuning box, the one on the top is the tower shunt feed and the one on the bottom is the 65 foot random wire running across the yard at 15 foot height for 80 meter short skip within southern Calif. The balanced line circuit employs a 4:1 balanced to unbalanced transformer (balun) specially designed to minimize the power loss and give good frequency response. Adjust the gap to about 1/4". Carver Corporation of Lynnwood, Washington once made the ultimate AM Stereo/FM Stereo tuner, the Carver TX-11b. A manual tuner will allow tuning (by ear) out of the ham bands. So far received. , 67 / 4 ≈ 17 ft). Built using cheap 4 pair (8 wire) telephone 'ribbon' cable,&; (optionally) housed in cheap garden 13mm (~half inch) irrigation plastic hose. Random wire antennas should be connected to the banana jacks. Whip antenna's are highly vulnerable to localize interference. L-CH R-CH Rear Preamp Output Connect to amplifier RCA input Antenna Connector RCA Cable (sold. Pull the extra wire apart from the long leg of the antenna. Dave has added a nice wrinkle - the SWR indicater employs TWO leds, not the normally seen single red LED. No scientific breakthrough here. if the radio has long wire antenna there is a coil to make the tank. Sst T Random Wire Antenna Tuner. Works very fine and is offered for sale in as is condition with no returns offered. Homebrew lightning arrestor: How to make it Drill a hole in the bottom and in the lid of a 2-1/2" long by 1-1/4" dia. The resonance circuit forms [a bypass filter] as well as far as I am aware. Since you will probably be using what is considered a random wire antenna, connected at one end to the set, it may be of some value to know that the horizontal part of the antenna "points" in the direction of best reception off the free end. I knew I would rarely use it… so I built one from junk parts. Properly soldered. This is a 2kw tuner. Although this design has been around for a long time, it is only gaining popularity now due to the recent improvement in high power antenna tuners. In use this Antenna Tuner works best with a Long or Random wire antenna. Antenna tuner for random wire/longwire So finally,my question is,can you suggest an antenna tuner schematic that works from 10 thru 80meters?I don't need nothing. MFJ-971 Manual and schematic.