They are the original type of microstrip antenna described by howell in 1972. The mfj 934 combines a versatile antenna tuner with an artificial ground. One day while visiting with my friend jerb k8wpi we talked about patch panels and its advantages over antenna switches. Mfj mfj 1620t 14 mhz mobile hamstick vertical antenna 7 feet tall 3824 base 250 watts. Aug 25, 2019 a really cool 4010 meter qrp portable antenna. Mfj 269c gives you a complete picture of your antenna. Introduction this article introduces the basic concepts of patch antennas.
Mfj has controlinterface leads which allow certain models of mfj auto antenna tuners to be operated directly from the tune button on certain yaesu ssb transceiver models. Mfj269c antenna analyzer,jmrsales authorized mfj dealer. Here you can see here that the original panel as built by mfj is only 12 inch thick. What caught my eye about the mfj is the manufacturers hype.
Position name price colour colour make of handheld. Demonstrating the mfj1708sdr automatic relay switch with. Other useful information would include your experience with similar products, infomation on a product that you would purchase instead of this one, and so on. Mfj 1701 antenna switches make it easy to switch antennas without. It turns a random wire into an effective antenna that works. These are manual tuners designed to tune small loop antennas, and are. Mfj4706 coax patch panel, 6 positions main trading company. All information, images, and documents on this website are the sole property of mfj enterprises, inc.
This sp2t switch is n relay voltage can range from 18vdc to 32vdc. Mfj 1456 hfvhfuhf mobile antennas cover all of your favorite local and dx bands. Review and modifications by phil salas ad5x while wandering around the mfj area at dayton 2005, i saw several new products that got my attention. With a patch panel you can put any antenna on any rig. This arrangement allows you to simultaneously watch and listen. A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. They will repair for a fee, if you send the tuner to them. An antenna might cover all of those bands, but it cant do equally well on all of them. You can also plug in an antenna tuner, wattmeter, linear, etc so it is always connected to the antenna and transceiver selected. We use a simple rectangular, half wave long, probefed patch operating in its fundamental mode as an example. Consider the microstrip antenna shown in figure 1, fed by a microstrip transmission line.
Each device is then available on the front panel and can be connected to any other device using a short coax patch cable. I used am using this mfj1786 antenna at various qths from a mountain top overlooking the great smoky mountains national park, to our beachfront condo 100 yards from the gulf of mexico to our current home in potomac, maryland 15 miles from the white house and congress and from all three locations worked a total of over 100. As the ham radio hobby has evolved, mfj has continued to develop new products to meet the needs of amateur radio enthusiasts. For many years i used antenna switches and was not happy with any of them.
It puts the maximum radiation point high up in the clear where it does the most good your signal gets out even if youre ground mounted. Efficiency matters, so its not surprising this winning combination stands head and shoulders above shorter backpack antennas. If the antenna size is congruent to the wavelength in question, it is more likely it will do a good job. Coax patch panel, 6 positions mfj coax patch panel connects devices with virtually no loss, feedthru or crosstalk provides 12 teflon so239 coax feedthru barrel connectors to patch 12 coax fed devices together with short coax jumpers. But we need antenna, with the mfj 1708sdr you can share your favorite hfvhfuhf antenna with an sdr. Coax patch, rg2, 100ft, pl259pl259 the mfj 5806h is a 100 foot coax cable, rg2 au, with pl259 connectors on both ends. Switch connectors 11100 transco antenna model sp2t female rf 35. Mfj204b antenna bridge thank you for purchasing the.
Tune the antenna tuner until the meter of the mfj 204b reads minimum 11. Mfj 9232 i make a small commission on purchases made thro. Mfj mfj2982 antenna hf vertical multi band, mfj2982. The auxiliary wire ran out at a right angle into an open field of grass at an approximate 160. Mfj s unique elevated top feedtm elevates the feedpoint all the way to the top of the antenna. Like our big ear, this portable monopole features mfjs rugged 17 stainlesssteel collapsible whip paired with an adjustable highq airwound coil. This deluxe high power antenna transceiver switch has two ceramic rotary switches that let you select 1 to 6 antennas and 1 to 6 transceivers in any combination.
So i simply used the hardware from the mfj panel and installed it onto a board that i had already cut to fit. Your antenna tuner is now set for 50 ohm at that frequency. Broadband vertical antenna with no ground radials is super easy to assemble. You can read your antenna s swr and complex impedance 530 khz to 230 mhz continuously with no gaps. Connect the other end of the isolator to the transmitter using a short length of coax. Mfj 1786 loop antenna my stealth antenna installations. Mfj coax patch panel connects devices with virtually no loss, feedthru or crosstalk provides 12 teflonr so239 coax feedthru barrel connectors to patch 12. Mfj4706 6position coaxial patch panel radioworld uk. An automatic antenna relay switch is used to automatically ground the sdrs antenna input whenever the tx capable radio transmits in order to protect the sdrs. Mfj 1456 hfvhfuhf mobile antennas mfj1456 free shipping. The mfj 2286 for top portable performance, carry a big stick. If i am reading the manual correctly, the length is 2. Mfj does sell an optional bci filter unit for the 259b which eliminates the problem. I would like to share my experience thus far with the mfj 9232 qrp loop tuner.
To use, connect your coax fed devices rigs, antennas, swrwattmeters, tuners, amplifiers, preamps, switches to coax connectors inside the patch panel. The mfj2286 for top portable performance, carry a big stick. It consists of a flat rectangular sheet or patch of metal, mounted over a larger sheet of metal called a ground plane. We offer all mfj antennas from stock or to preorder. I have been looking at these for years, and have always been fascinated by mag loops. Provides 8 teflon so239 coax feedthru barrel connectors to patch 8 coax fed devices together with short coax jumpers. The mfj 1798 could be the answer to many hams problems, a vertical antenna that does not take up much space, requires no radials and covers ten bands from 80m to 2m. Mfj2286 portable performance antenna radioworld uk. Microstrip antennas are becoming very widespread within the mobile phone market.
Hold one end of the coax patch cable close to the antenna input of. Requires optional radio patch cable with pl259 connectors. Mfj enterprises inc,ameritron,hygain,hygain,cushcraft,vectronics,mirage, mfj, mfj enterprises, antenna,radio,ham radio,amateur radio,tuner,analyzer,starkville,amplifier. Mfj1786 loop antenna my stealth antenna installations. Patch antennas are low cost, have a low profile and are easily fabricated. Lower band is retuneable to cover 470940 khz for maritime and 600 meters. Read antenna swr and complex impedance 530 khz to 230 mhz. View the manufactures page for mfj5803x the mfj 5803x is a 3 foot coax cable, rg8x au coax, with pl259 connectors on both ends. Describe your experience with the mfj1788 super hiq loop and tell us why you give it the rating you did required. Maybe drill two holes for coax bulkheads i only plan to use one at the moment for my 6m2m440 vertical above the radio room, some allthread bolts and wing nuts for one or two balanced feedlines my main reason to even do this, a ground bolt and a random wire bolt allthread also and. Mfj4706 coax patch panel, 6 positions main trading.
The good news is that mfj is helpful in selling or giving, free of charge, parts and instruction if you opt to repair yourself. Antenna feedthrough panel welcome to the home of k4nhw. Base fixed location antennas antennas antenna systems. This is a quick heads up on field testing of the modified mfj 1026 phasing unit done on saturday, july 26, from the robbins road holmes field beachdxpedition site located off route 3a in plymouth, ma approx. Connect the antenna to your antenna tuner, then connect the mfj204b to the tuner. Mfj coax patch panel connects devices with virtually no loss, feedthru or crosstalk. If youre planning on using a remotely tuned antenna, and an automatic antenna controller, then inductive matching is your only choice if youre seeking fully automatic operation. One plate is larger than the other, which is called ground plane and. Well, i bit the bullet today and placed my order with mfj for an mfj 1786 magnetic loop antenna. This can be done using a coax patch cable such as the mfj 5803 or mfj 5806. Fixedmount cb radios free delivery possible on eligible purchases. The mfj 4706 6position coaxial patch, mfj coax patch panel connects devices with virtually no loss, feedthru or crosstalk, provides 12 teflonr so239 coax feed thru barrel connectors to patch 12 coax fed devices together with short coax jumpers. Mfj coax patch panel connects devices with virtually no loss, feedthru or crosstalk provides 12 teflonr so239 coax feedthru barrel connectors to patch 12 coax fed devices together with short coax jumpers. Mag loops are very efficient and are much smaller than full size resonant loops.
One series of products that i found very interesting were the mfj loop tuners. Mfj mfj1620t antenna hf mobile single band, mfj1620t. Field testing comments the mfj 1026 phasing unit by mark connelly july 28, 1997. The basics of patch antennas, updated orban microwave.
Worlds most popular swr analyzer is super easytouse. Install the rf isolator by connecting the coax cable from your antenna to one end of the isolator. Mfj 929, mfj 939y, mfj 991b, mfj 993b and mfj 998 auto antenna. Maybe the mfj will improve the tuner so that no damage to meter will occur if one fails to change the output setting. I have been browsing through some verticals that gave me sticker shock but found two that might fit the bill. My experience so far with the mfj9232 loop tuner american.
View the manufactures page for mfj4704 provides 8 teflon so239 coax feedthru barrel connectors to patch 8 coax fed devices together with short coax jumpers. Be prepared and able to communicate in case of emergency with the largest selection at. A few weeks ago we posted about the mfj1708sdr automatic relay switch and how it can be used to combine an rx only sdr with a transmit capable radio. Jul 01, 2016 i would like to share my experience thus far with the mfj 9232 qrp loop tuner. Then, when you are key up to transmit, the mfj 1708sdr cuts off and grounds the sdr antenna line, providing your sdr with bulletproof protection from damaging rf.
The main antenna for the mfj 1026 ran on a slight downslope along the side of robbins road straight towards the sea at a bearing of about 70 degrees. Mfj mfj4706 cables other, mfj4706 ham radio outlet. Any reuse or redistribution of the contents of this website are strictly forbidden without authorization from mfj enterprises, inc. Describe your experience with the mfj 2990 vertical antenna and tell us why you give it the rating you did required. Mfj amateur and cb radio antenna matcher matchbox 1080m mfj lowers swr and provides more power to your mobile antenna. Your rig runs more efficiently and puts out more power to the antenna with less heat. Feb 20, 2012 well, i bit the bullet today and placed my order with mfj for an mfj 1786 magnetic loop antenna. It is mounted on a small, rectangular, flat surface and consists of two metallic plates placed upon each other. Homebrew antenna coax patch panelpart 1 of 2 youtube. Mfj amateur and cb radio antenna matcher matchbox 1080m.
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