Tube power amplifier 3W with 6BX7

Tube power amplifier 3W with 6BX7

Circuit diagram

Circuit

  • POWER OUT – 3W/8 ohm – 1KHZ
  • INPUT SENSIV. – 600mV for 2W
  • DISTROTION – 3%
  • FREQUENCY RESPONSE – 22HZ-50KHZ -3dB
  • S/N – 90dB

Part List

  • R1= 22Kohm
  • R2-3= 1Kohm
  • R4-5= 1.5Kohm
  • R6-7= 470Kohm
  • R8-9= 1Kohm 2W
  • RV1= 250Kohm Log. pot.
  • C1-7-9= 100nF 1KV
  • C2= 220uF 350V
  • C3= 150nF 400V
  • C4= 100uF 25V
  • C6-8= 2X100μF 350V
  • D1-2= 1N4007
  • V1= ECC81
  • V2= 6BX7
  • T1= 220V@2X250V/6.3V/6.3V
  • T2=Audio transformer

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