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Tube alternatives Mugen Amplifier as published in Elektuur/Elektor issue 10-2007.
Notice: Minor component changes and adjustments have to be made to use the tubes mentioned here ! READ VERY CAREFULLY !
Document prepared by W. de Haan (NL) [all measurements using an experimental test-set-up]
Original design : ECC83 + ECC88
Alternative 1: 5965 + 6BQ7a
Alternative 2: 5965 + 6N1P
Alternative 3: 5965 + 6CG7/6FQ7
Alternative 4: 5965 + V2 and use of the IXYS IXCP10M45 instead of R7 [no use of R7]
notice:
- maybe you need to change P1 for a 5K potentiometer.
- the 5965 is pincompatible with the ECC83.
- the 6N1P, 6CG7/6FQ7 and the 6BQ7A are pincompatible with the ECC88.
- using the 5965 there is no option for overall FB. Overall gain using the 5965 with no FB is 22 dB; for 100 watt into 5 ohm sensitivity is 1.9Veff.
- all measurements load is 5 ohm and no use of overall FB.
Alternative MUGEN 1
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V1 = 5965 with R3 & R4 = 47K / 2W
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V2 = 6BQ7a with R7 = 22K / 3W
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Uv = +310V
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UaV1b = 145V, I V1b = 3.5 mA
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TP3 = 3V
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UkV2 = 148V, I V2 = 6.7 mA
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output voltage
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output power
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distortion
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gain
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2.3 Veff
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1 W
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0.065 %
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22 dB
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5 Veff
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5 W
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0.055 %
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10 Veff
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20 W
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0.075 %
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15 Veff
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45 W
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0.17 %
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20 Veff
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80 W
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0.36 %
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22.3 Veff
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100 W
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0.55 %
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Alternative MUGEN 2
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V1 = 5965 with R3 & R4 = 47K / 2W
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V2 = 6N1P with R7 = 22K / 3W
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Uv = +310V
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UaV1b = 145V, I V1b = 3.5 mA
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TP3 = 3V
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UkV2 = 148V, I V2 = 6.7 mA
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output voltage
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output power
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distortion
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gain
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2.3 Veff
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1 W
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0.072 %
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22 dB
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5 Veff
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5 W
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0.074 %
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10 Veff
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20 W
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0.045 %
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15 Veff
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45 W
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0.08 %
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20 Veff
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80 W
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0.28 %
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22.3 Veff
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100 W
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0.64 %
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Alternative MUGEN 3
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V1 = 5965 with R3 & R4 = 47K / 2W
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V2 = 6CG7/6FQ7 with R7 = 22K / 3W
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Uv = +310V
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UaV1b = 145V, I V1b = 3.5 mA
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TP3 = 3V
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UkV2 = 148V, I V2 = 6.7 mA
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output voltage
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output power
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distortion
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gain
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2.3 Veff
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1 W
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0.052 %
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22 dB
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5 Veff
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5 W
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0.058 %
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10 Veff
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20 W
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0.125 %
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15 Veff
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45 W
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0.26 %
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20 Veff
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80 W
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0.45 %
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22.3 Veff
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100 W
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0.65 %
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Alternative MUGEN 4 , MUGEN to the MAX
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V1 = 5965 with R3 & R4 = 47K / 2W
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V2 = see table using IXYS* CCS instead of R7
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Uv = +310V
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UaV1b = 145V, I V1b = 3.5 mA
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TP3 = 3V
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UkV2 = 148V, I V2 = 6.7 mA
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gain= 22 dB
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output voltage
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output power
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distortion V2 ECC88
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distortion V2 6N1P
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distortion V2 6BQ7a
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distortion V2 6CG7
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2.3 Veff
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1 W
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0.08 %
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0.08 %
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0.08 %
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0.07 %
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5 Veff
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5 W
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0.095 %
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0.1 %
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0.085 %
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0.075 %
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10 Veff
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20 W
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0.08 %
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0.09 %
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0.065%
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0.06 %
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15 Veff
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45 W
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0.06 %
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0.082 %
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0.05 %
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0.04 %
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20 Veff
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80 W
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0.085 %
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0.13 %
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0.09 %
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0.08 %
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22.3 Veff
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100 W
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0.21 %
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0.3 %
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0.22 %
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0.26 %
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IXYS* = IXYS IXCP10M45 [TO-220 case using heatsink] using Rset IXYS = 392E
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