Great explanation. Just found one of these for $24 in a thrift store and practically ran with it to the counter

@Commsprepper

4 жыл бұрын

good price.

I've been off air for 20 years, but with war in Europe, I am compelled to dust off the HF radio. Your simple to understand videos have been a great help. Thanks from Ka4eie

@Commsprepper

2 жыл бұрын

Thanks for comment and channel support.

This is the BEST explanation i've see on Antenna Tuners yet! Simple, clear, understandable, and right to the point. Bravo!!

@Commsprepper

8 жыл бұрын

+Kevin Dooley Thank you.

@noelstephenryan4837

Жыл бұрын

Agree, best explanation ever.

I have watched ten of these instructional videos on he mfj and you explained it BETTER than anyone else....GREAT JOB... Short sweet, to the point and excellent modulation

I learned more from watching your part 1 and 2 videos than an entire afternoon of reading the 949 e manual. Thanks!

@Commsprepper

3 жыл бұрын

Glad it helped!

My first antenna tuner was the MFJ-949D. It also features a 50 ohm dummy load to use as a load to tune a tube transmitter. My first HF rig was a Kenwood TS-520s that had Tube finals requiring the dummy load. So this tuner offered a lot with 2 antenna selections and a selection for a long wire or balanced antenna for a total of 3 antenna options. I have owned many tuners and autotuners since, but would never be without the MFJ-949E tuner in my Shack!

Great videos. No other video here mentioned the tip about starting with the most noise to start close. Thanks

Nice video! My first tuner back in 1993 was the earlier model (949D) of this tuner. It did a great job and had lots of features for $149. Back then I had a Kenwood TS-520S HF Tube rig that the transmitter had to be tuned into a dummy load. The MFJ-949 had that built in! Plus you have the option of two different antenna's, therefore eliminating the need for an antenna switch! And a built in 4:1 Balun for balanced line antennas, plus a balanced single random wire connector! And the large lighted cross needle meter was easy to read. Plus it was the perfect size. I think these features at the price of $150 are exactly why the MFJ-949 has been the most popular tuner for many years. In fact I'll be purchasing another for field work and as a backup to my LDG AT-100 Pro II.

Thank you for a well done video and tuning instructions. I just ordered an MFJ-962D.

Excellent videos. Thanks for putting these online. They cleared up many questions I couldn't answer by reading technical material. I am a visual learner and you are a great teacher.

@Commsprepper

7 жыл бұрын

Glad it helped.

Very handy explanation all round. And I'm impressed by the MFJ too. I had a automatic tuner but I had a feeling it wasn't tuning it down properly. There's no doubt once you've done it this way. The cross needle system left me quite sure the RF front end was 'safe'.

Nice video series. Thanks. I took the tech exam last week and I'm waiting to show up in the FCC database. Videos like these are very helpful to noob like myself.

After teaching a class to Ham Radio Ops on the build of the MFJ 941EK antenna tuner I have many stories to tell. All good ones! LOL :) I bought an extra kit to use incase any of the students needed a part. Not one of the kits shipped from MFJ had parts missing or damaged. Thumbs up to MFJ for their work and dedication. Thanks for the video! 73 Jimmy, WX9DX, ARRL TS

@Commsprepper

8 жыл бұрын

+WX9DX Thanks for commenting. I hope the video helped. Hank

Again, another very instructive video. Thank you. From this, I have found exactly what I was looking for and it has told me just what I wanted to know.

@Commsprepper

10 жыл бұрын

Glad it helped. Thanks for taking the time to watch and comment.

Thanks x 3. Part 1 and 2 are the best tuner videos. "Tell it to me like I'm a 5 year old" and you did better. I'm getting set to get MFJ 945E - yes 945.

Nice! Well done. Thank you. You have explained this really well for me. I do want to learn how to do this. And not everyone has the analyzer or scope or any other gadget that many tutorials use when showing how to tune the circuit and antenna. I bought the kit. I am pretty confident that I can put it together and get it to work properly, but just using the tuner alone by itself, you have helped me a great deal. Thanks. Best Regards. 73, steve Great job.

Great video, CP!! Keep up the good work! We aprpeciate it!

I have recently bought a MFJ-949E (used); I have no experience with antennas, and both of your videos - Antenna Tuners I & II are helpful. Thank you.

@Commsprepper

10 жыл бұрын

I'm happy the videos were helpful. Tank you for taking the time to watch and comment. CommsPrepper

Very good video with good practical use and examples. Sometimes you just have less than optimal antenna conditions, unfortunately, and antenna tuners help and can make the difference from no transmitting to transmitting.Thank you for your very clear video.

Thanks for such an informative video. I use the same MFJ tuner as the one featured and although many hams disregard my tuner as rubbish it does the job very well with my end fed long wire. Keep up the good work.👍

@Commsprepper

4 жыл бұрын

Thanks for the comment.

It looks cold. Stay warm and keep making these great videos.

I have the exact same tuner and really like it. Right now all I have for an HF antenna is a G5RV about 50 feet up in an inverted dipole, this tuner tunes it all the way on every band. Thanks for the video.. good info.

@vernonraines3002

3 жыл бұрын

Have the same antenna and tuner. Works great on 75 AM. and super on 20 meters

Great info on manual tuners! Love the Micom 2! I've got a Micom 3F and soon will have the DHS Micom 3 Rapid deployment package. Excellent radios!

@Commsprepper

8 жыл бұрын

+jared morrison I have the Micom 2E put up right now. I recently switched to an Icom IC-7200. I don't do any non-Amateur stuff anymore.

Great Vid, I am new to Ham radio and I now understand completely how to tune Thanks

Excellent - exactly what I needed to see. Please keep making these....

@Commsprepper

10 жыл бұрын

I will try. Thanks for watching and taking the time comment. CommsPrepper/.

Good Day, Thank-you for the informative videos regarding the MFJ 949E Antenna Tuner. I found both videos very easy to follow and I will recommend them to any Amateur Radio Operator or SWL'r who wants a clear, concise tutorial on this unit. Thank-you Mark - VA3FLC

@Commsprepper

7 жыл бұрын

Thanks for watching and supporting the channel.

Thank you very much. I just got the mfj 949e and I though it was broke and was going to call the place where I got it. So I went on youtube and watched your video. Boy, the manual never said anything like what you did to get it to work. Thank you very much wb8bra

@Commsprepper

5 жыл бұрын

Glad it helped

Thanks for helping a new HAM get a perspective on this tuner. I have a Kenwood TS-570D with an auto tuner built it but it seems that a manual tuner does the job better.

@tdgreenbay

3 жыл бұрын

They usually do... also the radio doesnt have to work so hard

Nice explanation, looks like another item to add to the list. Thanks for sharing.

Nice videos and good basic info...enjoyed them.

@Commsprepper

7 жыл бұрын

Glad they have helped. Hank

I get my 949e tomorrow---this vid is a big help.Thanks

@Commsprepper

9 жыл бұрын

I'm glad it helped!

You can still have a high SWR even with a tuner. It's just the tuner helps block it from touching your radio. When you feed a dipole from coax, I'd recommend inserting a choke as close to the feed point as possible. Or use a balanced feed line from the balanced terminals from the tuner to the dipole, making it a doublet. Less losses that way too.

@w4mkh

3 жыл бұрын

An AT can't really make a bad antenna good. It just looks like a 50 ohm match to the radio now and you don't get rf reflected back to the radio. The only way to get the antenna to optimum efficiency is to cut it to the proper length.

Excellent video! Thank you very much. Cheers!

Thanks for your demonstration. I will buy that antenna tuner now he he. Great help.

Thanks for taking the time to make thyis video found it very helpfull. Its amazing how close you get properly tuning the antenna by just listning to the noise, I find when Ive done just that final tuning only needs a tweak.

@Commsprepper

5 жыл бұрын

Glad the video helped. My tuner is off-line right now. It got zapped by lightning and the two diodes are blown. I am waiting for replacements to come in the mail.

Thank you for this video, it will help me to tune my antenna. 73 de Manfred, DC2FK, North Germany

very useful info, i recently picked up this same tuner, thanks for the tutorial *thumbs up*

@Commsprepper

7 жыл бұрын

+ghostvox glad it helped.

Learned how to tweak using a tuner.... great video.. now I know... . Thank you Commsprepper

@Commsprepper

3 жыл бұрын

Glad to help

Good presentation. I have the MFJ 949, and use it on field day for an IC-735. For everyday operation, my Kenwood TS-2000 has an automatic tuner and I mostly use resonant antennas, i.e, dipoles, beam, etc.

@Commsprepper

9 жыл бұрын

Thanks Bob. CommsPrepper

First!!!! :-) Great video. Best explanation of that process I've ever seen!

Thank you, you explained it very well. 73 from Australia

@Commsprepper

4 жыл бұрын

Glad it helped

I just got my 941E today and your video was perfect... The manual that I had to go and download was not as clear as your video... Thanks for posting.

@Commsprepper

8 жыл бұрын

+Dave B I think you will be very please with the tuner. I am happy the video helped! Welcome to HF radio. CommsPrepper

Really great video... very instructive. 73

I bought the Micom used. I used to be a member of the Military Affiliate Radio System (MARS) and needed ALE. You can still get them used - there are two for sale right now on eBay (one is below $500.00). You still need to have your own power supply and antenna tuner. There is a Micom tuner but I have never seen one on eBay or used.

This is a old video, but very well done and still holds true today. I use a similar antenna tuner to tune a 100' long random wire and it works quite will with 100 watts of transmitter power on the HF bands. Thanks again for your efforts.

@Commsprepper

4 жыл бұрын

Thanks for the channel support.

Thanks for the great info!

Thanks for making this easy to understand!

@Commsprepper

4 жыл бұрын

Thanks for the channel support.

Oh and where the heck did you get the Motorola Micom? Those are neat, been looking for one for a mobile rig for a while now.

Thanks for the great video, Commsprepper! You can correct me if I'm wrong on any of this but the way I understand it, tuners don't correct the antenna, but rather they just keep the reflected power reflecting back into the bad antenna/cable mismatch. The end result is still a bad match, and still not resonant, but the radio no longer sees it. The coax cable run to the antenna wastes a lot of that reflecting power in heat, so the antenna only transmits so much of your output power into radiated signal. The reason that people use ladder line immediately after the tuner is because losses at HF frequencies are very low (like fractions of a dB), so the tuner can keep reflected power going back up to the antenna very efficiently. There's still a loss but it's much lower than when feeding the antenna with coax, and thus your radiated signal is much closer to what you'd have with a good natural match. I do however find it interesting that you're tuning by ear, using the signal levels. This would suggest to me that the signals coming in from the antenna are arriving at the radio much more effectively, which seems to challenge the idea that a tuner does little for the performance of a coax fed antenna. I'm getting an MFJ-941E pretty soon for my own setup, and although I plan to feed a full wave loop with a very short run of window line, I'll be very interested to see what it does for it, especially for received signal strengths. I have to work with indoor solutions for now (think "attic + lots o' wire") so things are particularly challenging for me. Maybe when I finally get everything rolling, I'll put up a demo video of the setup.

@Commsprepper

9 жыл бұрын

NightRunner417 Congratulations on getting a 941E. I had one of these too. There is no heat created in the feed-line, the heat is created back at the radio's finals from reflective power. The tuner will not fix the antenna, it makes the antenna system more resident (antenna, cable, and tuner). That is why you can ruff tune by ear. You are making the system more resident and thus improving receive performance. However, in the end the antenna is not efficient. It will work and the tuner will protect your equipment but it will not perform like a resident frequency specific antenna. Thanks for watching and taking the time to comment.

@NightRunner417

9 жыл бұрын

I know all about heating in finals, I was talking about the dynamics of coax cable vs. use of balanced feedline like window or ladder line. Coax is far more lossy than those, and the main two ways that the losses happen are by conversion of RF signal into heat - dielectric loss and resistive loss both do this in coax. So, what happens is that any coax in the system at all will radiate a fraction of your transmit power away as heat. Then a fraction of any reflected power is again radiated away by the coax as heat. Then the tuner reflects the reflected power back down the coax toward the antenna, and again the coax radiates a fraction of it as heat. Window and ladder line have far less loss at HF frequencies, so the tuner is able to more efficiently make use of your reflected power and turn it into transmitted signal at the antenna... sort of similar to how a laser bounces trapped light back and forth to keep it going into the useful direction at the aperture. Now, how much difference there actually would be at the far end of the QSO with a coax vs. ladder line system, you'd have to do the math. All I know is that the more anal the ham operator, the more likely they'll insist on using ladder line (especially after a tuner) to keep the losses low and the efficiency as high as they can scrape up. Good article on the mechanics of coax cable loss here: www.radio-electronics.com/info/antennas/coax/coax_loss.php

@kensaunders5877

9 жыл бұрын

NightRunner417 basically all the atu does is corrects the feed line impedance miss match. It has nothing to do with reflecting power, just tries to get as close to a 50 ohm to 50 ohm match at the xmiter as possible

@adelarsen9776

9 жыл бұрын

Ken Saunders Correct. An ATU is an impedance matching device. An Antenna Tuner is a guy with side cutters.

@djvnet

4 жыл бұрын

@@Commsprepper Oh my. You've got some gross conceptual errors here. Your video explains well the "how" but most of the "why", including the statements above, is not factual and is incomplete.

Thanks. Super informative for a new ham!

@Commsprepper

3 жыл бұрын

Glad it was helpful!

Great video!

@Commsprepper

5 жыл бұрын

Thank you.

Great video, comms!

@Commsprepper

7 жыл бұрын

Thank you.

Thanks! I needed that. I have a slightly different model of the MFJ.

@Commsprepper

4 жыл бұрын

Glad it helped.

Good video. Thanks.

Thank you !!!

Extremely useful for me, too. One question - do these MFJ tuners need cleaning if they've been sitting a while? I don't think mine is operating optimally - it doesn't seem to want to tune the way it should - so I may open mine up and shoot some Deoxit in to clean it out.

Very interesting and educational. Thank you

@Commsprepper

4 жыл бұрын

Thanks for the comment and channel support.

Good instructional. In an emergency prepper setup, that MFJ949 keeps the transmitter happy. I tuned a 20m 1/4 wave vertical on an mfj949d up on 40m: FLAT swr/ zero reflected, but LOTS of rf in the shack. It works though. I guess maybe 1/3 of tpo made it to the antenna. Hey, in a "gotta put a signal on the air" situation arrises...

@Commsprepper

7 жыл бұрын

It's hard not to like a manual MFJ tuner.

@johncliff996

7 жыл бұрын

Try a better earthing system. It should reduce the feedback rf even if it does not eliminate it completely.

de-oxit is a every 1/4 of the year routine for me :)

Good video! Thanks.

@Commsprepper

7 жыл бұрын

Thank you.

Keep it coming and 73

I put a 66 foot multi-band dipole inveted vee diagonally on my roof. The yard is the size of a postage stamp. I can tune the clothes line to 160 meters with an antenna tuner. I paid $300 for a 35 year old Heathkit 2060A, which I like a lot better than anything MFJ makes. It will run two coax cables, single wire, 300 & 450 ohm ladder lines. The only issues I have ever seen with the 2060A is a tendency to arc to the Balun above 1000 watts. Wrap the silver plate busing up in silicone & rubber tape and they are good for over 3000 watts SSB, or over 1500 watts AM. I could never ever dream of fitting an 80 meter dipole on my property. With the tuner, I can dial in 160 meters. I put a home brew tuned RF noise bridge in all my tuners. I am picking up an old Matchbox today. The main attraction there is the relay panel that has 6 transmitter/receiver inputs, 8 antenna outputs, a VSWR/watt meter and some extra filters. I don't really need the Matchbox. I think the 2060A is about as good as it gets. Any price under $400 to your doorstep for a clean 2060A is a good deal. Any 2060A for under $250 to your QTH is a steal. MFJs had a tendency to arc even on low power (100-200 watts). I have had a 3KW MFJ arc at 100 watts. That was enough to make me look for something used, with a better build quality. The Heathkits came with a blank notebook for dial settings & basic settings for each band. My linear amp will fold back above about 2.5:1 and shut down. Not sure about some of the transceivers. The Yeasus, Icoms, Ten Tecs & Kenwoods I have will, but running them near their foldback limits at full power is rather hard on the finals. Finding genuine finals is getting really expensive now, and the market is flooded with counterfeit Chinese made final RF transistors. They are set on dies that are about 2 sizes too small, so they will work great..... for a few hours.

@kj4ilk

5 жыл бұрын

Nothing's ever impossible I've made antennas out of coat hangers you just have to know how to build the antenna Heck if you wanted to make a miniature Delta Loop you could just get some PVC pipe cut notches in the ends of it and then put that out you got to make sure it's the right kind though so it doesn't get messed up also you could take plastic coat hangers and put them between the dowel rod and construct it that way

Nice explanation.

wow , what a good detailed video ty very much , I was just sort of given on these tuners I will only be able to run a 130 ft of enfed wire . wow wow wow

@Commsprepper

3 жыл бұрын

Glad it helped

Bravo !! Thank you so much !!! 73

@Commsprepper

7 жыл бұрын

Glad it helped.

Thank You, Sir!🙂🙏🏻🙏🏻👏🏼👏🏼

@Commsprepper

2 жыл бұрын

Welcome

cool man great video. heres to low reflected power.

Thanks !

Excellent explanation! Thx. That means, if I buy a Sirio Bumerang 27w 11m base antenna I do not need any cutting of carbon counterpoise with this MFS 949E (or similar) tuner and I also can use that Sirio 11m antenna for 10m frequency, don’t I?

Perfect, thanks!

@Commsprepper

4 жыл бұрын

Glad it helped!

Great video and very good tips .

@Commsprepper

10 жыл бұрын

saltire546 Thanks.

The button that you push in for 30 watts or 300 watts. I thought if you push it in, it would set the meter up for 300 watts and if it was not pushed in, the meter would be set up for low power as used for tuning. When using the Tuner and running 30 watts, the meter seems to register correctly on my Tuner with the button pushed in. Also when tuning, what power level should you use when transmitting. I read somewhere that you should never use more than 20 watts. These two videos were very helpful!

@Commsprepper

6 жыл бұрын

+skf1492 I tune with 5 to 10 Watts. Then change the meter to higher power and tune again with 50 watts. Then full power

At 3:52 How did you determine the SWR was at 2.5:1 ?

I have an auto on my 590k, but during this COVID thing i got a seventy three hundred. it has a built in antenna tuner. I have a old mfj antenna tuner. would it be wise to use it on a modern computer controlled radio?

thanks for the best explanation I've seen on antenna tuners; Once you set the trans & antenna capacitors for greatest noise, do you adjust the antenna cap when transmitting to set or just the transmitter cap? thx

@Commsprepper

9 жыл бұрын

tcitim First adjust the center inductor coil (clicks with steps) for max noise, then adjust the two capacitors.

@WB8BRA

5 жыл бұрын

Thank you very much. I just got the mfj 949e and I though it was broke and was going to call the place where I got it. So I went on youtube and watched your video. Boy, the manual never said anything like what you did to get it to work. Thank you very much wb8bra

VERY USEFULL, THANK'S FOR YOUR EXPLANATION....GOOD JOB.....S51LD

Hello Mr. "Commsprepper". I have been studying your videos on ham radio, enough to have gotten me started in obtaining my proper licenses --> thank you very much, Sir. Now, I am torn in getting an antenna analyser (tuner and SWR), before turning on my YASEU FT-857D. I know you've gone with the D-Star route, in seeing your mobile mount on your 2015 NISSAN truck. Getting back to base stations, what is the latest MFJ Tuner Model that you suggest? Thank you Sir, for your hard work in producing these types of videos/lessons for us "newbies" to follow. Oscar Lechuga (KG5ULB)

@kj4ilk

5 жыл бұрын

Hey Oscar don't you have Zello if you do I think I talked to you on it

How do (did) you like that Radio? I was just gifted a MICOM-H model. Presumably, the predecessor to yours. The thing is built like a tank.

Just found this video, great job explaining how to use the tuner. What really caught my eye was your rig! I had no idea that Motorola made HF radios. I guess that thought was rather narrow minded, but I've just never heard of one. What can you tell me about it?

@Commsprepper

4 жыл бұрын

It's a Motorola Micom 2E. I don't think they are made anymore. I no longer have it.

Can this also be used for receivers only?

An internal inspection is a good idea but I would not recommend touching the capacitor plates. You could mess up their alignment (see my "Repairing an antenna tuner (replacing bad capacitor) video.

Nice video. I just got the MFJ-941E . Can you explain a little bit about the black Watt button is it in for 30 Watts or out? and what setting do you use for full power. Thank you KC2YME

@Commsprepper

7 жыл бұрын

I don't have mine in front of me but the setting (button depth) is silk screened on the face. The 30/300 watt setting applies to the meter scale / power. Radio has more than 30 watts then you need to use the 300 scale or you will peg the meter and ruin the movement.

So whenever you move to a new frequency you have to stop and tune? Do you tune using an AM carrier? Wouldn’t transmitting to tune on a frequency you want to respond on interrupt others trying to respond to the CQ? How do you tune without disrupting others?

@Commsprepper

3 жыл бұрын

You need to re-tune anytime you change frequency. AM or RTTY setting provide a carrier for tuning (low power). Tuning on frequencies is rude. Move slightly below or above, listen, and tune there with lower power.

What is your opinion of the automatic tuners available compared to the 949? KM4UQU

Bob when transmitting. are you using the tune control to apply power to check swr? thks mike

@Commsprepper

9 жыл бұрын

The radio in the video (Motorola Micom 2E) does not have a tune control button. I set the radio to AM (for steady carrier) and set the radio to low power (10 watts).

Thank you Commsprepper for an educational and instructive 'How To' video. I just got a second hand 949E but no power supply and I wondered if you could answer me a question from your experience. Is the `12V PSU only for the front panel light - it looked from your video that the red switch was not depressed? The strange thing is that the circuit diagram shows that the 12V supply goes not only to a lamp but also to a transistor Q1. So my question is - can I use this successfully without a 12V supply or will I get incorrect results? Many thanks Regards, Bob from Scotland, UK PS I hope you are still active and enjoying this hobby....

@Commsprepper

5 жыл бұрын

Yes you can use it without power. I have never powered my tuners.

@bobbryce8674

5 жыл бұрын

@@Commsprepper Many thanks for that. 73s Bob

You have probably moved since making this video but how did you run the coax into your home? That's the problem for me. I don't want to drill holes into the wall

@Commsprepper

3 жыл бұрын

You can get an MFJ-4603 antenna window plate.

How are you applying power to transmit. Are you using Cw and pressing key. Good demo of how to use atu and difference if not tuned.

@Commsprepper

8 жыл бұрын

+Robert Harper With this radio low power AM so I have a constant carrier.

Is there a danger of harmonics when trying to transmit 7mhz on a 20m antenna (even though it's tuned)?

@Commsprepper

3 жыл бұрын

Harmonics would not be created by the antenna.

Thanks.

@Commsprepper

3 жыл бұрын

You're welcome

Our Rights Shall Not be Infringed!!!

Hi, I have an MFJ antenna tuner, but was not sure how to use it until I saw this video--very helpful. I have a Di--Pole for 20mtres made with 2 mag mount antennas joined with a centre connector,without the magnets.It works fine,but now I can check it.It is on a pole 20ft high near trees. About 1ft below it on the same pole I have put up another Di-pole for 80Mtres.Can you tell me if it will affect the operation of the 20mtre Di-pole and vice--verser. Are they too close to each other? I was intending to switch from one to the other with an antenner switch.They won"t be used at the same time. Many Thanks--Frank--UK.

@rmachayes

10 жыл бұрын

Frank, this is a very complicated subject with so many variables that it is virtually impossible to state how the two antennas will effect each other. Why not visit your local library and do some research. When you do, you will quickly come to realize that as fascinating as antennas are they are just as complicated, at least to me anyway. Goodluck and 73. Mac W4OSD

@frankcurry6891

10 жыл бұрын

Rodney Hayes Hi, Rodney, Thanks for the reply.I will take your advice and maybe join a Ham Radio Club again. I belonged to the Milton Keynes club based at "Bletchley Park" UK a few years ago.Many Thanks 73 Frank M3 FEC.

@rmachayes

10 жыл бұрын

frank curry Big Bletchley Park fan here, Frank. Dennison, Turing, all those unknown (in a lot of circles), heroes of WW2. Fascinating stuff.

If you enjoy making antennas, then you may want to buy, or borrow, an MFJ 259B antenna analyzer. I have used them for a while and allows you to see the characteristics of what you have created.

@Commsprepper

7 жыл бұрын

I would like to get my hands on one of those. I do have a Signal Hound spectrum analyzer and tracking generator that allows me to do antenna analysis but the MFJ is a smaller package. Thanks for the tip. Hank/CommsPrepper

Good job, thank you! 73 de WA5SAT

will the 949E operate on the 2 meter and 70 cm bands?

@Commsprepper

9 жыл бұрын

MontiR Aruba No - it's an HF only tuner. Here is a link to the manual: www.mfjenterprises.com/support.php?productid=MFJ-949E

very nice production. I have 1 question, i have the same tuner with a TS-480SAT and when the tuner says my SWR is about 1:1 my radio still shows it is maxed out. what am I missing or doing wrong?

@Commsprepper

8 жыл бұрын

+Michael Hardy Sr No, that's odd. Do you have someone in your area with another SWR meter to test with?

@Airsoftforall

8 жыл бұрын

+Commsprepper I'll have to check around. there was a ham who just sold all his hf stuff as he got out of hf. I will ask if he might still have a swr meter.

@johncliff5417

6 жыл бұрын

Try to borrow a 50 ohm dummy load that is able to handle the TX output Check what the radio is showing with it straight into the output. If it shows a 1:1 match and output at full power that should prove the radio ok. Now connect the dummy load to the output side of the atu. Go through the tune up procedure and see what is going on when you change the ATU settings. Make a note of the settings and the test frequency then compare these to your antenna/dummy load settings. It should give you some idea as to what is happening when you are tuning a antenna with an unknown impedance. Note ! check the jumper coax from radio to ATU.Do a physical check and an electrical check if necessary for continuity on both centre conductor and the braid plus see if it is shorting out i.e a fine wire from the braid to centre pin on either end. It does happen and would throw a right old wobbly as you go to transmit and could easily blow the finals of your radio. Hope this helps out. 73 de G0WXU . Ex. Royal Signals

Also you have to make the adjustment on every frequency you want to use ?????

@Commsprepper

6 жыл бұрын

yes. change frequency and you have to re-tune.

What would you using for a Dipole coaxs??? TNXS

@Commsprepper

5 жыл бұрын

RG-213 or LMR-400

So, is this also used to calibrate SWR or is that still a different meter? Sorry, I have a lot to learn thanks.

@Commsprepper

7 жыл бұрын

You can use this tuner for shortwave reception but the meter only looks at transmit, so you would not see any meter movement when receiving shortwave stations.

@Gitarzan66

7 жыл бұрын

Thanks for the help. So you're talking S.W radio. I only have a A.M. Cobra. This meter might be out of my league and over my head. I have a cheapo Workman meter. Maybe I need some bigger better radios if I was ever to need a meter like this.

@Commsprepper

7 жыл бұрын

Okay - You have an AM CB radio? In this case you only need an HF SWR meter. No need for the tuner because you can buy antennas that are already tuned (cut for the right length). The meter will let you know if there is an antenna problem.

@Gitarzan66

7 жыл бұрын

I plan to get a SSB radio down the road but the Cobra 29LX is it for now. I just got a Antron99. Next I'm wanting to get a better meter, that's how I found your vids. Thanks a bunch for your help. I learned a lot from you.

Truly appreciated! KF7JEZ (portland, OR)

@Commsprepper

9 жыл бұрын

Glad the video helped. Respectfully - CommsPrepper