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70121Re: [softrock40] Re: What's the most TX power anyone has amplified an RXTX to? Just out of curiosity...

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  • Alan
    Nov 16, 2012
      ----- Original Message -----
      Subject: [softrock40] Re: What's the most TX power anyone has amplified an RXTX to? Just out of curiosity...


      >I am a little concerned however about doing it with reduced drive level. I use cheap USB or built in audio cards (walking carefully
      >here..... don't want to restart THAT war)... and I have found that the channel to channel levels do not always track that well as
      >you change the overall level. So the relative audio gains at the reduced level may not be the same when you bring the drive back up
      >and, as a result, your image rejection at operating level may suffer.
      >

      Yes, I also have noticed variations in gain between channels as the volume slider, or drive slider is changed.
      Image rejection needs to be finally adjusted with these controls set for operation at maximum required output.

      I as hoping that when I tested it would not be necessary to reduce TX output. And wondering if there was a way to even further
      reduce the stray signals getting into the receiver.
      But it will be a while before I try.

      73 Alan G4ZFQ
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