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I've tried both the IRF-520 and 530 in my BitX40 when the 510 bit the dust. Neither performed anywhere near as well as the 510. The 520 was better than the 530. Hint: Look at the input capacitance.
 

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  • @ Hambones amps:
    Does anyone know if you can replace the 2290 in a galaxy dx 93t twin turbine with a 2sc2879 red dot? If so, what would have to be tuned?
  • @ ShadowDelaware:
    Hambones the entire amp section would have to be retuned, and the rf transformers re wrapped.