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Introduction to using the MFJ-993 Intellituner with the Icom IC-7300
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- čas přidán 6. 08. 2017
- An introductory video covering the MFJ-993 Intellituner. This small automatic tuner covers 1.8MHz to 30MHz at up to 300 watts. Capable of tuning up to a 32:1 mismatch at full power, or up to 64:1 at 150 watts. The tuner has two switchable antenna jacks, and a 4:1 current BALUN.
Three antenna tuners to transmit (Rig,MFJ,Heathkit) must drive you crazy!
Why didn’t you mute the radio?
Where is the MFJ in your chain? You use 2 tuners?
thanks for this video. i know its been a long time ago, but i have a question.. i haave a similar unit, and recently got an rf amp, so this tuner cannot handle the power output... the question is can i have two tuners, this one and a HFT-1500 connected together plus that amp into a MFJ 1700C Switch? and how could i do this with the ICOM 7300
I find I need to power on the 993 after I power on the 7300 or the tuner doesn't work. Is there some setting I have missed? Thanks for the video.
I have a MFJ-993 too. After you tune up with low power, if you talk with SSB with 100 watts, do you find the frequency display on the 993 go erratic and also change the SWR while your speaking. With CW it works fine. SSB drives the tuner crazy. Do you have the same results?
That should be as expected if I am thinking right. Well, depending on the input. The tuner is looking for a carrier, so it can reference the signal, and apply different LC combinations. The reflections aren't necessarily linear, and the amplitude isn't constant. Although I have never tried, I would assume that AM would tune just fine, as it has the center carrier.
Hi good afternoon, I have the same tuner but I does not tune with the preamp on and if I tune a frequency with the att on, when I transmit with the pream the tuner think that iam tuning again,what can I do?
Hello, Nice Video. Can you tell me the Pinouts for the tuner to the ICOM cable?
I realize this was 3 years ago, but this tuner is at a nice price right now. Do you know if it will tune without input from a radio (sensing RF), I have a Xiegu G90(20w) and an old Ameritron als 500m and am trying to get things running, even to the point of using a foot switch to key the old amp. kd9oam.
I was always told to have the Auto button pushed in when using the interface. Wondering why you don't do that?
Why two turners ?
good day i was wondering do i need to run a jumper to my antenna tuner from my icom? it appears to tune with low swr though no problem there have a nice day kf6sif .
how or can this tuner be used as an swr meter without tuning the antenna. basically what im asking is can it be used as a true swr meter alone?
The manual sounds like you can set a swr target of 1.0. I can only find how to set it for 1.5 or 2.0. Do you know how to set it for 1.0?
Can the MFJ turner ground be connected to the Icom 7300 ground?
I mean to put a direct cable from the transmitter to the coupler?
Thank you
I have the same radio. Good ?
Hi did you find out what the power down fail was ...great vid
Trying to figure out how to do this with the IC-9100 (key up method)
Do you have to turn the IC-7300 internal antenna tuner off to you the MFJ-993B?
ok so i guess after i hooked up that wire that came unsoleried from my molex connector i got my tuner to work go ahold of someone in san jose and im in the central valley so that seems to work ok for me for just a wire antenna.
Has anyone noticed any difference (993B) not 993, how well it will match at 150w vs. 300w. I am finding I at least on 80m with balance line going to the center of about 125 feet on each side, I have not seen any improvements.
How does one disable the internal tuner to use the external one ??
Emil, any tuner that uses the tuner interface connection on the back of the IC-7300 will disable the internal tuner. The radio detects that an outboard tuner is connected and disables the internal tuner.
Can you tell me how is the interface cable you made?
Funny thing I am able to tune 6 m on this antenna tuner it works and others have done it too I think
How do you put it in the 300what mode and 150watts
Which interface cable will I need for that setup?
I use a homebuilt version of the MFJ 5124I. If you decide to make your own, order the correct Molex connector for the radio end.
I ended up making my own :)
Hi I noticed the problem you had a 7.210MHz. I have the same problem but no other means to sort it like you did. I am running a GWHIP 421 Triband resonant end fed antenna which is resonant on 40, 20 and 10M. So any idea why the tuner fails on 40M?
Sometime you get a voltage or current peak that the tuner cannot handle. How are you terminating your endfed?
Its attached to a tree using a piece of plastic a thin rope
I have a 993B & everytime I keyup it says 'Huh?, increase power'. I have an ICOM 7100 running 15watts. I have done a total reset and still get the same results. Anyone have any idea why?
Same exact issue here. Even sent it back to MFJ and they said everything was fine. Good luck.
Thanks for the video. When I press the Tune button on the tuner, it beeps at me and displays the message "Huh? Increase Power". If I press the Tune button a second time, it tunes properly. Auto button is out on the tuner, power output of the radio iss 100w SSB. Any idea what's causing the initial error message? Also, it I press the Tune button on the radio, it uses the internal tuner and not the MFJ tuner.
Do you have the interface cable between the IC-7300 and MFJ-993 or are you using it in RF sensing mode?
I'm using the Icom interface cable.
To me, it sounds like there might be two issues. One is that there may be an issue with the RF sensing circuit in your MFJ-993. The other is that there may be an issue with your interface cable. With a functional cable, the internal tuner should bypass. Have you performed a full reset on your 993?
I will give the reset a try. Thanks for your help.
My exact setup. Although i put a ANC-4. Damn neighbors.
wuts wrong with ur neighbors?
could i have a drawing of the setup with two tuners and an amp
i had a wire come unsoildered again from my molex i geuss thats what that plug cable again so everyone if you have problems not tuning check to make sure no wires have come disconnected i wasted alot of time trying to figure out what went wrong .
Hi there do you know with an IC 7000 and a TS 480 if you need an interpase box or just a lead from radio to tuner....Fred in Uk g4vvq
Your Icom can connect to the 993 with the MFJ-5124I cable, which is the same cable that I use, and the Kenwood may be able to use the MFJ-5124K cable. I don't have a modern Kenwood, so I can't speak to that. You might contact MFJ and ask... I have found their support to be very helpful. You may also be able to use the tuner in semi-automatic mode, but I recommend the cabled fully automatic mode.
The 480 would just need the cable mentioned in the other comment and moving the jumper on the inside to the "K" position.
whats the difference between a 993 and a 993B ?? newer model? g4vvq uk
The 993B is an updated version of the 993.
Sounds like a diesel truck when it’s tuning! 😃
Factory reset to test power down pass
www.manualslib.com/manual/859243/Mfj-Mfj-993.html?page=29
Also more than 4 relays- other than that great video
Sorry.but cant here from squelch being open..too noisy.
bloody noise can`t hear you very well.
POOR photography. Be ashamed, VERY ashamed.
First thing you want to do is use some common sense and turn the radio volume down!