MFJ-993BRT Remote 300W automatic antenna tuner installation

The MFJ-993BRT is a remote controlled automatic antenna tuner for 300W SSB maximum power, which doesn't need an additional control cable. Tuning is fully automatic when detect input signal (5-20W). Internal logic systems measures the SWR and the signal frequency. Immediately start to search the best LC combination in the tuner for the best SWR match. Second tuning is very fast - until 1sec.I hope you enjoy this video.
Here is the link where I bought it from (EU-Germany):
www.wimo.com/en/mfj-993brt
#mfj-993brt #remote #tuner

[@prestonshute7243]

Very nice video Paul. Great set up on top of your building. You did a good job in sealing up all the exposed point on the tuner. See you have a brace on your arm, hope your well soon. Always enjoy your videos and the construction projects. My best to you. 73 wd4dda

[@OM0ET]

Thank you Preston. It works well for me 😉👍 I just feel small pain in my wrist. I believe it will be OK 😉 thanks! Best 73, Paul

[@ivvitan]

Great setup, Paul!

[@kellypaws]

I finally got mine to work, after repairs, with a short vertical. Surprising. All 59s, with 100 watts. Really has been a bit of an ‘eye opener’.

[@OldSal-d8h]

Are you on 160? 73 de N9NY

[@bluesdude758]

Good video. I also liked seeing your antenna "farm." Maybe you could do a video about all your antennas? I was surprised to see your end-fed antenna going to the other building across the street. Here in USA, most permanent antennas have to start and end on your own property.

[@OM0ET]

Thanks! Good idea. I may do that ;-)

[@SuburbanDXing]

Enjoyed the video, Paul. Thank you for posting it and 73! de WX0V

[@OM0ET]

Thank you for watching Scott! ;) Greetings from OM. 73, Paul.

[@hectorpascal]

Note that the black self-amalgamating "rubber" sealing tape you use, will not last forever in sunlight. At the BBC, we used first to cover antenna connections with that tape, and then go over that with a horribly sticky, grease impregnated, waterproof cloth tape called Densotape. No, I'm not actually recommending it, although it IS an excellent product! Sadly, it took HOURS to get the grease off your hands after using it!

[@smartazz61]

Must be nice having two tall buildings to string a wire from. Most of us are lucky to have two 20 foot tall trees. If that. I'm just letting my jealousy come out.

[@OM0ET]

Yeah it helps me a lot, but the background noise is terrible in this case, because is the antenna situated in between the two tall block buildings filled with cheap chinese electronic :-) So I guess that could be better to have it 20ft above the ground in very quiet enviroment :-) 73, Paul

[@mabo4848]

Thanks

[@jano3681]

Ive bought atu100 for 26eur at ali. It tune piece of wire with less than 250ms and can be used in the same way.

[@blackgoldestates172]

lovely audio, what speaker are you using

[@Supercazzola]

Please, what is the top connector that looks like DC coaxial connector ?

[@dmcarpman]

i have a ranger 300 tuner box all i need to do is send it a tone from a cw key to tune all connections are at the base of it and antenna post up top

[@OM0ET]

Yes, the same process works on MFJ also :)

[@1OFGODSOWN]

Is it still working properly? I am buying one Tomorrow so just seeing how yours has worked out over time.

[@WallDiver7]

Is there anyway to change the factory default "Target SWR"? On my 993BRT switch board, the Mode button is missing (not installed).

[@parjoonline3400]

👍👍👍

[@forextraderradioman]

Thank you for this Video... can you please make a Video, how to set or configure the target SWR of that auto-tuner? Vy 73 from Hamburg, Dietmar DL4HAO

[@OM0ET]

There is no direct button on the bias box. I suppose it's doing after open the ATU enclosure...

[@ur5scopcopter626]

👍

[@Mark300win]

Where do you connect the radials/counterpoise wires is it to the ground lug? Can this be used to operate from the park without proper grounding rod in place?

[@IZ0MTW]

Hi, what is that black compound you’re using to isolate connections? thanks for sharing your video 73’

[@OldSal-d8h]

That’s mastic pad tape de N9NY

[@1OFGODSOWN]

Use Coax Seal it’s Awesome.

[@k3dydxing708]

I ordered the same tuner a few years ago. Mine was Dead On Arrival. Power ON relay clicks on, then AM carrier to initiate the tuning process and nothing.

[@OM0ET]

Oh so sorry! Did you return in back to the shop? Thanks God mine if fine...

[@KennethSievers]

Great review and installation. 73 de KI5DLS

[@OM0ET]

Thank you for watching Kenneth! ;-) 73, Paul.

[@Andy-wz1gq]

good video thanks OMOET greetings from Germany DH5REN

[@OM0ET]

Thank you and greetings from Slovakia! 73, Paul ;-)

[@b.b.2638]

Is this a good antenna for mining hnt?

[@Mark300win]

For a truck setup, do you recommend this auto thner with a 102” whip or screwdriver coil + the same whip?

[@OM0ET]

I would definitely recommend a screwdriver antenna for your purpose.

[@pochonietypasjomrutusultim5875]

Super 👌 perfect 👊 73

[@OldSal-d8h]

Thank you for the video. Can you please respond with the type of wire used for the antenna? The insulators you use are trick! 73 Gregg de N9NY

[@OM0ET]

Thank you. The wire was purchased especially from HyEndfed company the Netherlands 👍

[@davepickering997]

Shame they didn't supply weather-proof caps for the connectors.

[@NamasenITN]

what did you connect the ground connector to?

[@OM0ET]

I've connected to the grounded tower construction

[@goatsinker347]

Would like a version that can handle more power.

[@1OFGODSOWN]

They make one.Google is your friend in some cases but not all.

[@kenwing6196]

The MFJ 998BRT is for 1500W

[@reallybadaim118]

You got the other end on the building next door? Lol

[@OM0ET]

Yes 🙂👍

[@1OFGODSOWN]

Those are not PL-259 connectors.They are SO-239 connectors just so everyone is using the Correct information and on the same page.🎙

[@stevenaustin2860]

HI cal 73 MATE and enjoy the radio as i will

[@jimthvac100]

The only bad thing I see about using one of these is you cannot conveniently disconnect it from the antenna when one is preparing for a storm. I understand one can use one of those surge suppressors/lightning arresters. But I don't trust them to protect my investment.

[@OM0ET]

Oh yes, thats true, but I can protect it with resistor connected between the wire socket and ground. Behind the ATU I use proffesional lightning arresters for 50ohm coaxes.

[@jimthvac100]

@@OM0ET I would imagine if there was enough static build up and lead up for a lightning strike I really doubt that million ohm resistor would do much. Not only that but I would suspect that bleed resistor would just lower the gain of that antena as some of the signal would also be divided up somewhat with the receiver and bleed resistor to ground.

[@1OFGODSOWN]

You don’t know about Insurance? All of your radio gear should be protected by a Rider Policy so it’s all covered so no issues.

[@kevinkc3onohelijeepworld953]

Wow you scared me there, one-tune up didn’t see you drop the power. That scare the stuff out of me every key up 😬 also here there are very prone to static hits and lighting. Best make a quick disconnect or a faraday cage around it. Or get the extra warranty protection.

[@bolovanro]

The TR have fallback for power. So, is swr is high...tr will reduce the power so to keep the reflected power as low as possible. For this reason, in MFJ documentation is say that you need to reduce the power only if TR don't have fallback. Otherwise, you may use 100W. On moonday will arrive my 993BRT :D

[@kitesurf58phil]

I have a remote auto ATU which I have used for over 20 years. I fitted a static bleed resistor of around 0.5 MOhm between the antenna connection point and the ground stud. I have also used the same auto ATU for kite lifted antennas with up to 200' feet of wire held aloft with no problems. The high impedance of the static bleed resistor doesn't affect the tuning or operation of the remote ATU but provides a safe path to ground. I hope this is helpful. de G0RKF

[@OM0ET]

@@kitesurf58phil Thanks for great recommendation! I will do that also ;-) until first summer thunderstorms! 73, Paul.

[@OM0ET]

@@bolovanro Yes exactly! ;-)

[@bolovanro]

@@OM0ET I understand from docs that if swr is not over 2 (0.5 over 1.5 - the target swr)...the tuner will not retune. It's true? Did you changed the settings (open the case)?. In cw how is running (swiching/retuning etc)

[@jeromegrzelak8236]

you fulled the radio thats all

[@segrus]

Why is there so much noise on the air?

[@OM0ET]

Where exactly you mean? On the radio or outdoor?

[@segrus]

OM0ET on the radio.

[@OM0ET]

@@segrus I live in the noisy enviroment. Many buildings, families and cheap electronics. Produce noise, unfortunately...

[@segrus]

OM0ET I have a lot of noise, too. Elevator engines also make a lot of noise. I have 20 floors in my house. Below 4 MHz, one solid noise. We must go to the forest to live :(

[@OM0ET]

@@segrus yes exactly! 😃 We have to move to countryside for low background noise. But there is the problem with powerlines...

[@stevenaustin2860]

just listening to K3LR as i speak in the contest there doin ok but not as good as my mate w2re

[@OM0ET]

I worked both of them. They was very strong in here today and yesterday too. :)

[@stevenaustin2860]

@@OM0ET yes it was great the contest enjoyed it

[@OM0ET]

@@stevenaustin2860 Yes, I have collected 8208 points. For me very good :-P hihi

[@stevenaustin2860]

@@OM0ET yes well done m8