2N2219A RF Amplifier 10MHz NF

HP-346C NF Measurement

  • Same Board as 2N5109 with feedback adjusted for Zin = 50Ω
  • HP-346C ENR at 10MHz = 12.97dB = 19.815
  • Tc = 81.1dB, Th = 73.6dB, Delta = 7.5dB
  • Y = 5.623
  • NF = 19.815 / (5.623 - 1) = 4.29 = 6.3dB



OIP3

  • OIP3 = -1.7 + ((60.5 - 1.7) / 2) = 27.7dBm



HP-346C NF Measurement with VNWA Averaging

  • Same Measurement as above
  • HP-346C ENR at 10MHz = 12.97dB = 19.815
  • Tc = 81.07dB, Th = 73.49, Delta = 7.58dB
  • Y = 5.728
  • NF = 19.815 / (5.728 - 1) = 4.191 = 6.22dB
  • Note: LNA+VNWA NF reduces above ~0.05dB



VNWA S11 and S21