Do you use Full-Duplex voice? (not Satellite)

Discussion in 'Ham Radio Discussions' started by KE7RUX, Apr 29, 2020.

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  1. KE7RUX

    KE7RUX Ham Member QRZ Page

    Do you, or have you, used Full-Duplex voice? What do you find are the advantages / disadvantages? Do you regularly use it? What gives Full-Duplex a "leg up" on half-duplex ham communications?

    I am not referring to satellite full-duplex use.

    I've noticed that there is a lot of "Full-Duplex" capabilities popping up the last few years in commercial communications, but none in ham...recently. I am aware of previous Full-Duplex ham models that were discontinued because they didn't sell very well (ex. Icom IC-W21AT, V21AT, etc., Icom IC-3210A, etc.)

    Is it worth the investment?
  2. KU3X

    KU3X Ham Member QRZ Page

    Never !
    KE7RUX likes this.
  3. K1VSK

    K1VSK Ham Member QRZ Page

    QSK CW has been around a while. Nothing new.
    KR4YON likes this.
  4. KR4YON

    KR4YON Ham Member QRZ Page

    How far is the split usually when doing this?
  5. K9STH

    K9STH Ham Member QRZ Page


    Absolutely no "split" for QSK CW! Properly done, signals are truly zero-beat with each other.

    For phone operation, difficult to do on a single band below the 10-meter band where a significant difference in carrier frequency is possible without getting feedback.

    Glen, K9STH
    K4AGO, KR4YON and KA4DPO like this.
  6. W9WQA

    W9WQA Ham Member QRZ Page

    did it once for fun with hw24 ht on 144/450 simplex freqs.
    just waste batt power as you are on xmit always...
  7. KU3X

    KU3X Ham Member QRZ Page

    I hate to throw a wrench in the works, but QSK and Full Duplex are two completely different things.

    N1VAU, WQ4G, W9RAC and 3 others like this.
  8. K3XR

    K3XR Ham Member QRZ Page

    I agree.

    QSK * Shall I continue the transmission of all my traffic? I can hear you between my signals. Continue: I shall interrupt you if necessary.
    KU3X likes this.
  9. KA4DPO

    KA4DPO Platinum Subscriber Platinum Subscriber QRZ Page

    I have worked full duplex using cross band repeat, it was fun as a " let's see if we can do this" experiment, but no real utility in amateur radio. If you and a friend have cross band capability you should give it a try. We used two meter and 70cm simplex.
  10. KA9JLM

    KA9JLM Ham Member QRZ Page

    I use full duplex , I can tell if I am doubling with someone.

    It is cool, like talking on a cell phone.

    You need to mute when your spouse is yelling at you. ;)
    KR4YON likes this.

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