January 14, 2016

50W-70W Power Amplifier with 2N3055 & MJ2955


This good detail both circuit diagram ,PCB,part assembly,layout and show case in completed set that you can make with this information for 50 Watts Power Amplifier.

50W-70W Power Amplifier with 2N3055 & MJ2955

50W-70W Power Amplifier with 2N3055 & MJ2955

50W-70W Power Amplifier with 2N3055 & MJ2955

50W-70W Power Amplifier with 2N3055 & MJ2955

50W-70W Power Amplifier with 2N3055 & MJ2955

50W-70W Power Amplifier with 2N3055 & MJ2955

Could you read specification thus as below.
Performance

  • Output Power 50 watts into 8Ω 70 watts into 4Ω
  • Music Power 77 watts into 8Ω ;105 watts into 4Ω
  • Frequency response -1dB at 14Hz and 70kHz (at 1W- see Fig.1)
  • Input sensitivity 0.875V for 50Ω into 8Ω
  • Harmonic distortion <.05% from 20Hz to 20kHz; typically <.003%
  • Signal-to-Noise Ratio -114dB unweighted (22Hz to 22kHz); -119dB A-weighted, both with respect to 50W into 8Ω
  • Damping factor >140dB at 100Hz & 1kHz, with respect to 8Ω and without PTC thermistor
  • Protection fuses plus “Polyswitch” PTC thermistor .

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