MFJ-998 automatic antenna tuner 1500 Watts - Review and Setup

Discussion in 'Amateur Radio News' started by VA2PV, Jun 18, 2017.

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  1. VA2PV

    VA2PV XML Subscriber QRZ Page

    This is the MFJ-998 automatic antenna tuner 1500 Watts - Full Review and Setup. Tested with my Kenwood TS-990 and Heathkit SB-221 1.3kW tube amplifier (pair or 3-500z).

    I know, the bands were pretty bad the day I shoot this video, or I forgot to remove my RX antenna from ground ;-)

    Pascal VA2PV


    Attached Files:

    VE7PBF and K0PIR like this.
  2. K0PIR

    K0PIR XML Subscriber QRZ Page

    It looks like a very nice tuner. I have a 600 watt autotuner and use it almost every day. It is nice not to have to turn knobs hi hi.
    VA2PV likes this.
  3. K4SAW

    K4SAW Premium Subscriber QRZ Page

    I've had the 998 for many years. I started with a 929 autotuner several years ago with only a 100 watt rig and a G5RV and it tuned it no problem.
    I have since added a amplifier to the mix and needed the 998 to handle 1k or better and still get great results. The only thing you have to remember
    is to reduce power when tuning it hates to much power and will tell you so. :)
    K4BBN and VA2PV like this.
  4. KK4ITN

    KK4ITN Ham Member QRZ Page

    Why do these videos always have low audio?
  5. KF5UMC

    KF5UMC Subscriber QRZ Page

    I've used this tuner for 3 fine at 100-1200 watts. I never ran it above 1200 watts. The one thing I don't like is if I touch up the inductance and or capacitance a little it reverts back to the previous tuning. Also at times, it "looses" the capacitance/inductive settings completely if I change from one antenna to the other antenna and back. Could be operator error...

    Overall though I get it a 9 out of 10.
    VA2PV likes this.
  6. WB2JIX

    WB2JIX Ham Member QRZ Page

    VA2PV likes this.
  7. VA2PV

    VA2PV XML Subscriber QRZ Page

    Please specify? I reduced audio when the mic is to closed or sometime to voice over... 73
  8. K6LR

    K6LR Premium Subscriber QRZ Page

    Very well done! Thanks for the in-depth review. I run an older Yaesu FT-1000mp. Will this tuner accept this radio?
    Tnx, 73. K6LR
    VA2PV likes this.
  9. VA2PV

    VA2PV XML Subscriber QRZ Page

    I don't know, download the tuner manual and the radio manual. If it's like the Kenwood with the AT-300, you will be able to see if it's compatible with a Yaesu External tuner, I know there is some Yaesu in the tuner menu. As another ham mention to me, in radio it's not like the PC world where there's a plug and play system (think of those USB devices), so we must check first, hihi. Maybe that’s the reason so many people had a hard time with some of the most complex aftermarket device for the ham radio world. Thanks for watching. 73 Pascal VA2PV
  10. KF5UMC

    KF5UMC Subscriber QRZ Page

    Your audio in the video is fine...his ears or PC is NOT!

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