Yaesu has it wrong! FT-891 RX/TX Current Test

Discussion in 'Amateur Radio News' started by OH8STN, Mar 13, 2018.

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  1. OH8STN

    OH8STN XML Subscriber QRZ Page

    Hello Operators
    Topic of the day is the Yaesu FT-891. Many field radio operators have turned away from the Yaesu FT-891, because of thd specs regarding current draw on RX, published on the Yaesu website. Having owned the Yaesu FT-857, and 897 in past years, the current specs for the 891, seemed somewhat off- In fact, I wondered if Yaesu simply published "worst case" numbers on the site, without bothering to publish a range of numbers which would make more sense to potential buyers. So, in this video we'll be measuring the current draw of the Yaesu FT-891 at RX, 5, 10, 20, 30, 40, 50, 60, 70, 80, 90, and 100 Watts.

    Background
    I've had many requests on the channel for such a video. Operators would like to compare current consumption to other popular rigs like the Yaesu FT-857D, Icom 7200, Icom 7300, as well as understanding how hungry this radio is when deployed in the field.

    Despite the heart crushing review from the ARRL, I have found this rig to be a better investment, than the up and coming FT-818. Opinions may vary, I've got mine.
    Enjoy the video.


    73
    Julian oh8stn
     
    KK5R, F8BJE, AA8GK and 16 others like this.
  2. KD7WPJ

    KD7WPJ Ham Member QRZ Page

    To make a valid test - you have test current consumption on all bands. I reviewed PA design for this radio, and I found that it uses MOSFETs with significant gain change at 1.8-50 MHz frequency range. This may lead to different current consumption on higher frequency bands. In comparison, IC7300 uses MOSFETs with constant gain over HF/VHF/UHF bands.
     
    AB3ZI, KA2FIR, K4AGO and 3 others like this.
  3. NX1Q

    NX1Q Ham Member QRZ Page

    Thanks for the video and the effort behind it.

    I thought the same thing when I saw the 2 amp draw spec, and basically dismissed it out of hand to too much Tokyo 20% Rice Sake...(just like the quirky items the radio has, like resetting both the width and shift every time you use the band button, not saving width and shift settings in the memory and some others.)

    But, what makes me very happy is that you, Julian OH8STN, one of the premier portable operators has obtained the same radio I recently have also chosen for portable/mobile, really likes it, and is using it while making videos about it ! I'm looking very forward to more !

    Thanks so much !

    Don NX1Q
     
    W4MJE, W5VBA, KB2QQM and 1 other person like this.
  4. YO5PTD

    YO5PTD Ham Member QRZ Page

    oh8stn would it be possible to publish the bare numbers as pure text? thanks yo5ptd 73
     
    KK5R, KR3DX and OH8STN like this.
  5. K1YYI

    K1YYI Platinum Subscriber Platinum Subscriber QRZ Page

    I bought the 891 after 2 months of reading reviews and doing research. Haven't regretted it at all.
     
    K4GMO, W1SRR, KB2QQM and 1 other person like this.
  6. OH8STN

    OH8STN XML Subscriber QRZ Page

    Excellent point.
    I wanted to get valid feedback to improve my test. I think your comment is it. I'll repeat the tests, on each band in the coming weeks.

    73
    Julian oh8stn
     
    AB3ZI, WC5P and KF5VGK like this.
  7. OH8STN

    OH8STN XML Subscriber QRZ Page

    Certainly-
    I'll add episode notes tomorrow.
    73
    Julian oh8stn
     
  8. OH8STN

    OH8STN XML Subscriber QRZ Page

    Hi Don
    I'm just a guy too stupid to stay warm in winter.
    My only "regret" was the current draw @ 5w. I got over that kind of quick when I realized the receiver was what it was.
    Thanks for the kindness.
    73
    Julian oh8stn
     
    K4GMO likes this.
  9. US7IGN

    US7IGN Ham Member QRZ Page

    N4FZ, KF5VGK, KK5R and 1 other person like this.
  10. OH8STN

    OH8STN XML Subscriber QRZ Page

    Yeah, I am with you there.
    I initially dismissed this rig, but glad I came around.
    73
    Julian oh8stn
     
    WJ6F likes this.

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