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

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

ad: L-HROutlet
ad: l-rl
ad: l-assoc
ad: L-MFJ
ad: l-BCInc
ad: Subscribe
ad: MessiPaoloni-1
  1. K7JOE

    K7JOE Ham Member QRZ Page

    Bought one of these used. Tried it for a few weeks -fixed, mobile and portable. Not a bad little portable radio for casual cw / ssb use. The menu setup does suck. As does the fact that many functions are not stored and are thus lost on band changes. I bought this to try against the receiver in the IC-7300. Well, this receiver is certainly OK with some good noise reduction DSP circuitry, but overall it's not as good as IC-7300; The ergonomics and basic regularly used functions are a lot more difficult to get to with the menu system . I'll keep the IC-7300, although this rig makes for a really small and portable setup for those times when size/space constraints are at hand. For $500 approx street price, it's not a bad radio. Certainly equal or better than the other $500-class radios (Alinco, FT-450, IC-718, TS-50 etc)
     
  2. KJ6ZD

    KJ6ZD Ham Member QRZ Page

    Sorry about this, it wasn't really what I meant.
    Average as in averaging the consumption based on the readings, to get an idea how long it would run.
    Some oldtimer prefer a coil meter and say the heck with this DMM stuff, hi, hi.
    One could dissect the issue down to the individual electron (which is actually going the wrong way) or even to the atom, which would come close to hair splitting.
    Your tests are probably as close as it gets, anything else is probably not making a huge difference, anyway.

    Thanks for the brain food,
    Cheers
     
  3. KK5R

    KK5R Ham Member QRZ Page

    What I meant also was it's not a matter of instantaneous readings, it's a matter of average readings which is the norm with root mean square when interpreting power readings.

    As for the DMM versus a meter movement using an indicator needle, a meter movement does some averaging on its own by "smoothing" out any fluctuations and showing (usually) a relatively steady/stable meter needle indication. This is why the old techs usually tuned up the IFs using an old meter movement type multimeter since you can see immediately the effect of peaking/nulling. With the DMM, however, you have to "interpret" the quickly changing readings on the display and do an evaluation based mostly on experience while tuning.

    Using an o'scope is similar to the DMM but it at least you see a constantly changing indication as you tune which is perfectly usable.

    For many uses, the DMM's common trait of flickering digits when on the threshold of a higher or lower number is highly distracting — in my case, anyway.
     
  4. K5WW

    K5WW XML Subscriber QRZ Page

    Whatever happened to "hung, drawn and quartered"? Seems to me that you're going way to soft on them. :D
     
    KE0EYJ likes this.
  5. WB4M

    WB4M Premium Subscriber QRZ Page

    And then decapitation and burial. You left off the good part, lol.
     
  6. ND6M

    ND6M Ham Member QRZ Page

    actually, the good part was cut off
     
  7. K8AI

    K8AI Ham Member QRZ Page

    One ampere draw on receive is excessive enough if you're taking it portable. I take it that to most of you guys, "portable" means driving to a park and walking 25 feet to a picnic table with 25# of gear...(?)

    I would say 100mA in receive would be my limit.
     
    KK5R likes this.
  8. WJ6A

    WJ6A XML Subscriber QRZ Page

    There is no VHF or UHF in the IC-7300, so what does all this mean.vi used the FT-891 for over 6 hours running 15 watts, 15AH Lifepo4 battery and it still had charge left. The FT-891 is great for portable use.
     
    KK5R likes this.

Share This Page