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Keying an external power amplifier

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  • Yannick
    Hi, I have a couple of used surplus PA using a push-pull of 2SC2290 in class C. http://capheda.files.wordpress.com/2010/06/100_2425.jpg I have been using one
    Message 1 of 1 , Nov 30, 2012
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      Hi,

      I have a couple of used surplus PA using a push-pull of 2SC2290 in class C.
      http://capheda.files.wordpress.com/2010/06/100_2425.jpg

      I have been using one successfully with my SoftRock RXTX, putting out 10W for a little less than 1W in.
      I would like to try them with the Mountain Topper Rig.
      What is the best way to have a keying signal from the MSP430 ?
      Can I use the signal from P1.7 (pin 28) and somehow add a circuit similar to Q3 in parallel (using a Bs170) ?

      Thanks for your help.
      73,
      Yan - XV4Y.
      ---
      Yannick DEVOS - XV4Y
      http://xv4y.radioclub.asia/
      http://varc.radioclub.asia/
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