P2N2222A for the Pixie

On Semiconductor has a variant of the old 2N2222A in a plastic case called the P2N2222A and characterizes it as a small signal RF amplifier.  I picked up a few samples and ran three of them through the Pixie.  In all cases the RF output had increased to about 575 mW on the meter, with the SA reading 525 mW.  The second harmonic was well below FCC limits at -57 dBc.  That’s about 1.7 watts total input power on transmit, or about 1.15 watts dissipated in the transistor and filters.  Gotta keep that key-down period short!


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One Response to P2N2222A for the Pixie

  1. M says:

    Thanks for the nice Pixie series!

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