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Discussion in 'Software Defined Radio (SDR)' started by KN4TOU, Feb 19, 2021.

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  1. KN4TOU

    KN4TOU Ham Member QRZ Page

    HI OMs,

    In this new video I create a power amplifier with cheap chinese amps to increase up to 70w HACKRF ONE output power

    (english sub)

  2. VE7BPB

    VE7BPB Ham Member QRZ Page

    Be careful doing this kind of thing with the cheap Ebay amps. Those little 2 watt or 3 watt amps that are used as predrivers in this kind of application are generally truly rated at much lower outputs than they claim.

    I have a junk pile full of them, and even rebuilt a couple just to re-use the cases. Getting any info on the active device is usually impossible, so when you blow it up it's easiest just to gut it and use the case and connectors.

    RF Parts has some nice Mitsubishi and Toshiba rf modules that are very easy to use.

    regards, Roy
  3. W6RZ

    W6RZ Premium Subscriber QRZ Page

    A spectrum analyzer and a two-tone test can be very helpful. You could be transmitting 70 watts of hideousness.

    You want this:


    Not this:


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