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Welcome all to this group. I set it up as a generic group primarily for amateur radio operators that covers both commercially-made and home-built impedance matching devices used to match an antenna system to a transmitter (or receiver). Technically, what most of us call an antenna tuner is actually an impedance matching device, and probably in most cases it's attached at the transmitter end before a run of coax or open wire line to the antenna, so we're not tuning the antenna--we're tuning the antenna system. We're not going to be concerned about the term "antenna tuner" here, though, as most of us know what it is and that it's not usually acting as a true antenna tuner. Call it what you want, but most will call these an antenna tuner. I have several MFJ tuners, including the 939, which I like a lot, and the 3KW roller inductor tuner they make, as well as the smaller roller inductor tuner, a couple of "Versa Tuners," and a small MFJ auto tuner I plan to use for mobile use. I've never used it, but I also have their "ground tuner" that can change the RF electrical length of a ground wire from say a second story room to an earth ground below. Why MFJ? I've had great experience with their products, but I am aware that at times they fail to solder a joint properly or have other quality problems, and they've at times earned the nickname Mighty Fine Junk. There are other great tuners out there also. I just happened to pick up several of these at hamfests at a fraction of the normal selling price, and the price was low enough I bought some of these "just in case" I might need them sometime in the future. I ask that everyone treat each other with respect and dignity. No politics or religion here please (check your signature lines before posting). Don't be afraid to ask questions here. Donald -- AD8DY Formerly KJ3I

MONTHLY REMINDER--Our Amateur Radio Groups Below are our amateur radio related groups. Some may be new enough there are only a few members. If one of those interests you, join it and give it some time to grow. It costs nothing and if there’s few members, it won’t be filling up your inbox while you wait for it to grow. ? Alinco /g/Alinco-Amateur-Radio Antenna Tuners /g/Antenna-Tuners Anytone /g/Anytone-Amateur-Radio Baofeng /g/Baofeng CHIRP radio programming tool /g/CHIRP EF Johnson /g/EFJohnson-Amateur-Radio Ham radio antennas https://ham-antennas.groups.io/g/main Ham Radio Help group https://hamradiohelp.groups.io/g/main Icom /g/ICOM Icom 746 /g/Icom-746 Icom 746 Pro /g/Icom-746Pro Kenwood /g/Kenwood-Amateur-Radio MFJ ham equipment /g/MFJ-Amateur-Radio National /g/National-Amateur-Radio RF Amplifiers https://rf-amplifiers.groups.io/g/main Swan /g/Swan-Amateur-Radio Yaesu FT-757 /g/FT-757GX Yaesu FT-767GX /g/FT-767GX

Antenna Tuners For Sale: . Nye Viking MB V-A High Power Antenna Tuner For Sale: The rugged Nye Viking MB-V-A 3 KW HF antenna tuner features a silver plated variable inductor with a vernier dial, 7,000 volt variable capacitor and 15,000 volt switch selected capacitors. The frequency range is 1.8 to 30 MHz continuously. Dual metering provides for hands free SWR monitoring. The backlit dual meters show SWR and power continuously. You get push button antenna switching from the front panel. Outputs are provided for two coaxial cables, one single wire and one balanced line. The extra heavy gauge aluminum cabinet provides effective shielding. This tuner is a real brute; they rate it at 3000 watts, and I believe it. Cosmetically, this one looks close to new. Both the SWR meter and power meter work, including the lamps. It uses a 9 volt battery. It will tune most any thing. Everything is 100%! Buy this great unit with paper work for $400. . Dentron "Super Tuner Plus" For Sale: The Dentron Super Tuner Plus is a heavy duty antenna tuner covering the HF bands from 160 thru 10 meters. It is extremely rugged. The manual says it will handle 1000 Watts CW and 1200 Watts PEP SSB. The "Plus" indicates that it has a built in output meter on it. The built in balun is very large. Much larger than the baluns in the MFJ tuners. This one works fine; it is built like a tank! Cosmetically, it looks great. Buy it with paper work for $145. . Vectronics VC-300 DLP Antenna Tuner For Sale: The VC-300 DLP lets you tune any antenna from 1.8 to 30 MHz, including MARS and WARC bands. It has a 4:1 balun for balanced line antennas, and handles up to 300 Watts SSB PEP, 200 Watts continuous (150 Watts on 1.8 MHz). The VC-300DLP backlit Cross-Needle Meter display shows SWR, forward and reflected power simultaneously. It reads both peak and average power on 30/300 Watt scales. Meter lamp has front panel switch and requires 13 V DC. The VC-300DLP 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. Bypass position bypasses your tuner but keeps your SWR Power meter in line. A dummy load is built in. This tuner is much more rugged than most of the MFJ tuners. This one works 100% as it should, and looks very close to new. Buy it with paper work for $120. . MFJ 949B Antenna Tuner For Sale: The MFJ-949B is designed to match virtually any transmitter to almost any antenna. A 4:1 balun is built in. An antenna selector switch provides versatile antenna selection. A 50 ohm dummy load is built in. The MFJ-949B will handle up to 300 watts from 160 through 10 meters. You can read SWR, forward power and reflected power from the meter. To read forward transmitter RF output power, simply turn the meter FUNCTION switch to 30 or 300 on FWD. To read reflected power simply turn the FUNCTION switch to 30 or 300 on REF. The ANTENNA SEL. switch allows selecting two coax antennas either direct or thru the tuner, a balanced line antenna or wire antenna or a built in 50 ohm dummy load. The 50 ohm dummy load is rated at 200 watts. This one looks great, and functions 100% as it should. Buy it with paper work for $100. . I also have many other accessories available such as many different types of microphones, HTs, VHF and UHF rigs, HF and VHF/UHF antennas, connectors, miscellaneous accessories, etc. Just too many to list here. Please e-mail your requests. . Prices do not include shipping from Florida. Thanks. 73, Ken, W8EK Ken Simpson E-mail to W8EK@... or W8EK@... Voice Phone (352) 732-8400 .

Antenna Tuners For Sale: . Nye Viking MB V-A High Power Antenna Tuner For Sale: The rugged Nye Viking MB-V-A 3 KW HF antenna tuner features a silver plated variable inductor with a vernier dial, 7,000 volt variable capacitor and 15,000 volt switch selected capacitors. The frequency range is 1.8 to 30 MHz continuously. Dual metering provides for hands free SWR monitoring. The backlit dual meters show SWR and power continuously. You get push button antenna switching from the front panel. Outputs are provided for two coaxial cables, one single wire and one balanced line. The extra heavy gauge aluminum cabinet provides effective shielding. This tuner is a real brute; they rate it at 3000 watts, and I believe it. Cosmetically, this one looks close to new. Both the SWR meter and power meter work, including the lamps. It uses a 9 volt battery. It will tune most any thing. Everything is 100%! Buy this great unit with paper work for $400. . Dentron "Super Tuner Plus" For Sale: The Dentron Super Tuner Plus is a heavy duty antenna tuner covering the HF bands from 160 thru 10 meters. It is extremely rugged. The manual says it will handle 1000 Watts CW and 1200 Watts PEP SSB. The "Plus" indicates that it has a built in output meter on it. The built in balun is very large. Much larger than the baluns in the MFJ tuners. This one works fine; it is built like a tank! Cosmetically, it looks great. Buy it with paper work for $145. . Vectronics VC-300 DLP Antenna Tuner For Sale: The VC-300 DLP lets you tune any antenna from 1.8 to 30 MHz, including MARS and WARC bands. It has a 4:1 balun for balanced line antennas, and handles up to 300 Watts SSB PEP, 200 Watts continuous (150 Watts on 1.8 MHz). The VC-300DLP backlit Cross-Needle Meter display shows SWR, forward and reflected power simultaneously. It reads both peak and average power on 30/300 Watt scales. Meter lamp has front panel switch and requires 13 V DC. The VC-300DLP 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. Bypass position bypasses your tuner but keeps your SWR Power meter in line. A dummy load is built in. This tuner is much more rugged than most of the MFJ tuners. This one works 100% as it should, and looks very close to new. Buy it with paper work for $120. . MFJ 949B Antenna Tuner For Sale: The MFJ-949B is designed to match virtually any transmitter to almost any antenna. A 4:1 balun is built in. An antenna selector switch provides versatile antenna selection. A 50 ohm dummy load is built in. The MFJ-949B will handle up to 300 watts from 160 through 10 meters. You can read SWR, forward power and reflected power from the meter. To read forward transmitter RF output power, simply turn the meter FUNCTION switch to 30 or 300 on FWD. To read reflected power simply turn the FUNCTION switch to 30 or 300 on REF. The ANTENNA SEL. switch allows selecting two coax antennas either direct or thru the tuner, a balanced line antenna or wire antenna or a built in 50 ohm dummy load. The 50 ohm dummy load is rated at 200 watts. This one looks great, and functions 100% as it should. Buy it with paper work for $100. . I also have many other accessories available such as many different types of microphones, HTs, VHF and UHF rigs, HF and VHF/UHF antennas, connectors, miscellaneous accessories, etc. Just too many to list here. Please e-mail your requests. . Prices do not include shipping from Florida. Thanks. 73, Ken, W8EK Ken Simpson E-mail to W8EK@... or W8EK@... Voice Phone (352) 732-8400 .

Antenna Tuners For Sale: . Vectronics VC-300 DLP Antenna Tuner For Sale: The VC-300 DLP lets you tune any antenna from 1.8 to 30 MHz, including MARS and WARC bands. It has a 4:1 balun for balanced line antennas, and handles up to 300 Watts SSB PEP, 200 Watts continuous (150 Watts on 1.8 MHz). The VC-300DLP backlit Cross-Needle Meter display shows SWR, forward and reflected power simultaneously. It reads both peak and average power on 30/300 Watt scales. Meter lamp has front panel switch and requires 13 V DC. The VC-300DLP 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. Bypass position bypasses your tuner but keeps your SWR Power meter in line. A dummy load is built in. This tuner is much more rugged than most of the MFJ tuners. This one works 100% as it should, and looks very close to new. Buy it with paper work for $100. . MFJ 949B Antenna Tuner For Sale: The MFJ-949B is designed to match virtually any transmitter to almost any antenna. A 4:1 balun is built in. An antenna selector switch provides versatile antenna selection. A 50 ohm dummy load is built in. The MFJ-949B will handle up to 300 watts from 160 through 10 meters. You can read SWR, forward power and reflected power from the meter. To read forward transmitter RF output power, simply turn the meter FUNCTION switch to 30 or 300 on FWD. To read reflected power simply turn the FUNCTION switch to 30 or 300 on REF. The ANTENNA SEL. switch allows selecting two coax antennas either direct or thru the tuner, a balanced line antenna or wire antenna or a built in 50 ohm dummy load. The 50 ohm dummy load is rated at 200 watts. This one looks great, and functions 100% as it should. Buy it with paper work for $100. . Coaxial Cable "Jumpers" For Sale: Most of us need a variety of coax "Jumpers" around the shack to connect our rig to antenna tuners, amplifiers, coax antenna switches, etc. These jumpers are useful for that purpose. NEW Cable Experts CXP008C3, 3 foot, RG-8. Silver, teflon, PL-259 connectors on both ends. They sell it for $19; get this one for $12. I have an extensive number of jumpers in the range of 1 to 2 foot length. These are all 50 ohm coax, and may be the large (approximate 0.40 inch) RG-8 or equivalent, or RG-58 (under 1/4 inch). All have a PL-259 connector on both ends. They have all been tested. Please let me know approximate length you would like, and whether RG-8, or RG-58. These jumpers are available for $8 each for 1 to 2 foot, and $10 for 3 feet, plus shipping. I also have a few other longer lengths of coax available. . I also have many other accessories available such as many different types of microphones, HTs, VHF and UHF rigs, HF and VHF/UHF antennas, connectors, miscellaneous accessories, etc. Just too many to list here. Please e-mail your requests. . Prices do not include shipping from Florida. Thanks. 73, Ken, W8EK Ken Simpson E-mail to W8EK@... or W8EK@... Voice Phone (352) 732-8400 .

For those who have trouble reading the numbers, I have posted the same image on QRZ under "ANTENNAS, FEEDLINES,......". QRZ does not play with resolution of posted images. The measurement numbers are quite clear there. Dave - W?LEV Virus-free.www.avg.com-- Please join me. Dave - W?LEV

Hi, All, Due to a change of plans, I have available for sale an AH-705 Automatic ATU for the IC-705. This is absolutely brand new and unused because I never actually took delivery of the IC-705 I had intended to use it with! Ideally, I would like to exchange it for the Yaesu FC-30 ATU which matches the Yaesu FT-897 transceiver. If you don't have one of these, please Google second-hand FC-30s and I would accept that figure for a straight sale of the AH-705. Located in North Norfolk, but the AH-705 would be very easy to send by insured post. Bob

Hope all you have a Great Thanks Giving . Lookin' for a user Manual , ( Copy or pdf is fine )for Dentron AT-1K Tuner . Have done my usual search on , Rigpix, Universal Radio , if you have an actual link , will be appreciated , will pay for copy & post if you own one . 73 AJ W5heh gud on QRZ .

Is anyone aware of a company in Europe reselling the Emtech ZM-2 tuner in Europe? I want to buy one but the shipping fee is almost as high as the ZM-2 itself and on top of that I will probably be charged with VAT and customs fees. Second best would be to find where I can buy the variable capacitors and build one from scratch. That would be fun as well but I don't really have the time to home-brew it at the moment and hence plan on the short cut to buy a kit. Bj?rn, SM0SBL

I bought a used non-working Alinco EDX-2 auto-tuner at a hamfest last weekend and believe I have it working. However, the tuner is made to use with certain Alinco radios so I don't know exactly how the automatic tuning function is supposed to work, and I want to use it with recently made Icom radios. When I have power and ground connected, and ground the white wire in the connector (I did it inside the box, actually), while transmitting RF using FM for a steady carrier, it seeks and finds a solution now (it didn't before I made some adjustments per the service manual), then stops making the chattering sound. If I simply ground the white wire, it tries to find a solution but with no RF, it never finds one, and I expect that. What I'd like to know is if this is the expected behavior of this unit? I'd also like to know if I hook up the red and black wires to an Icom tuner connector, and the white one also, so that they mate with the Icom radio's red, black, and white wires, will pressing the TUNE button on the Icom 7300 (or other recent Icom HF radio) initiate a tune and should the EDX-2 find a solution, without me having to manually short the white wire to ground? The user guide and service manual are very brief and don't fully explain how the switching works. I found that the white wire when grounded initiates tuning. When I remove it from ground it stops trying to tune. That's about all I know except that when I force a tune, it finds a solution that is less than 1.5 to 1 SWR. On 80 meters it takes a much longer time to find a solution, and it doesn't find one on 160 meters, though it's not said to work below 80M, and I didn't use a very long wire for the antenna or counterpoise in my tests when adjusting the unit. Donald KX8K ---------------------------------------------------------------- There's no place like 192.168.0.1 ---------------------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas /g/HamRadioHelp /g/Baofeng

MFJ-706 or possibly MFJ-7000 AATU urgently wanted for special project. Seller in UK preferred but all considered. Purchase, or p/ex other ham radio or militaria items. Bob, G8IYK

The loss of 49:1 UNUNs or autotransformers has been asked many times in these groups. So I did something about it. I built two and measured the loss through two connected back-to-back. Please have a read of the attachment which documents my measurements in an attempt to answer this question. Dave - W?LEV -- Please join me. Dave - W?LEV

HI, I have recently acquired an 1201B 'scope (Rack mounted version of 1201A) that has a faulty channel. Can anyone point me to a source for a service manual or just a circuit diagram. PDF will do. Thanks, Dave.

Good day to all, I'm new to the group and I'm in need of a schematic for the Murch UT-2000B. The only schematic that I found on the internet shows one dual section air variable(250pf x 2 and one single section(250pf) air variable. The unit that I have has two dual section air variables. Also, the resistor value, capacitor value and diode are not the same as in my unit. Would someone in the group have the schematic that I'm looking for? Cheers! Janusz ve2zhp

Alamogordo Amateur Radio Club Serving Hams In The Tularosa Basin And Around The World And Beyond AARCs' 38th Annual Hamfest 31 Aug Labor Day Weekend 2024 from 7am to 3pm-ish (depends upon presentations) Free admissions, donations from local and Ham related vendors for door prize drawings throughout the day Morning brew and eats by club for donations, for lunch support your local vendors. Plenty of parking at the Otero County Fairgrounds, RV's welcome but no RV hookups, dump station on site Hamfest is ARRL approved and small listed nonprofit (needing all the help we can get) AARC is also looking for items to be donated as door prizes throughout the day "Give a big thank you to those who donated to our past Hamfests." You keep us afloat We would like to list your logo on our website to show donor support and advertise your business during the event Main prizes and Ht drawings are normally purchased by the club, (donations accepted) must be present for all except 1st prize 1st FT-710 AESS 2nd FTM-6000R 3rd Mini 1.3 OLED ZUMspot Kit 4th DM-30TR $1.00 Drawing for FT65 HT Main Prize drawing tickets $8.00 mail in post dated before 24 Aug (eligible for Pre-Registration Prize drawing of $50.00) $10.00 at the door, Swap Tables $15.00 with one chair Any profits made from our event goes back into paying our bills, insurance, repeater systems maintenance, classes and our other public activities We are also looking for folks/groups who would like to do short presentations Testing will be conducted on site around 9am-ish (depends upon the VE and VEC's) Apologize up front for any doubling up on email requests Check us out at http://www.qsl.net/k5lrw/ and on FB at Alamogordo Amateur Radio Club NM Our mails; KI5RUS Rusty rjaskolo@... (2024 AARC Pres and Hamfest Chair) KB7SQF Rick rick@... Street mailing address for packages please use; Russell Jaskolowski 1107 Hendrix Ave Alamogordo, NM 88310 AARC mail box is; AARC Hamfest 2024 12 Main St #383 LaLuz, NM 88337 Rusty's cell 575-491-3631 Thank you all for supporting our small club serving the community Rick KB7SQF 2024 AARC Director Hamfest Committee Member 73