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How to build Tube power amplifier 3W with 6BX7
August 6, 2010 - category: Audio amplifierCircuit diagram
- 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
circuit from http://users.otenet.gr/~athsam/tube_amp_3W_6BX7_A.htm
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