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Bluetone Melissa Preamp schematics

Bluetone Melissa Preamp schematics. ½ 12AX7. ½ 12AX7. B3. 340V DC. 100 kohm. 820 pF. 220 kohm. 1 Mohm. 4,7 nF. Preamp out. 470ohm. 150 kohm. To PI/2. 1,0 uF. 47 pF. 10 nF. 150 kohm. Input. 330 kohm. 1M log. 220 nF. 2,2 nF. Level. 1,0 uF. Middle. 33 kohm. 100 nF. 1Mohm.

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Bluetone Melissa Preamp schematics

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  1. Bluetone Melissa Preamp schematics ½ 12AX7 ½ 12AX7 B3 340V DC 100 kohm 820 pF 220 kohm 1 Mohm 4,7 nF Preamp out 470ohm 150 kohm To PI/2 1,0 uF 47 pF 10 nF 150 kohm Input 330 kohm 1M log 220 nF 2,2 nF Level 1,0 uF Middle 33 kohm 100 nF 1Mohm 22 uF 220nF 270 kohm 1 Mohm 1,5 kohm 4,7 nF 470 nF 150 kohm Gain 2,2 nF 15 kohm 100 kohm Bass Bright 50 kohm 50 kohm Harry Kneckt 8.2.2007

  2. Bluetone MelissaPower amp and power supply schematics 12AX7 B2 Volume Dual-Gang OT Hammond 1620 1 Mohm 22 kohm 100 kohm 100 kohm 330 ohm Treble 220 kohm 47 nF 47 nF 1 Mohm B1 B2 4,7 nF 1 Mohm 220 kohm 330 ohm Power amp in 22 kohm Power tubes 6V6GT 100 kohm 22 nF 250 ohm 5W 270 kohm 33 kohm 25 uF PT 2x325V 150mA 6,3V 5A, 5V 3A 2x100 ohm Heaters 6,3 V AC 380 V 360 v 340 V B1 B2 B3 Stand by switch 5Y3/GZ34 230 V AC 100 ohm 4,7 kohm 10 kohm 2x325VAC Harry Kneckt 8.2.2007 Fuse 1,2 A 20 uF 40 uF 20 uF 20 uF 5 V

  3. Bluetone MelissaVoltage chart V1(12AX7) 1= 148 V 3= 1,1 V 7= 38,3 V 6= 206 V 8= V2(12AX7) 1= 257 V 2= 70,7 V 3= 73,1 V 6= 250 V 7= 60,9 V 8= 73,1 v V3(6V6GT) 3= 398 V 4= 365 V 8= 21,4 V V4(6V6GT) 3= 398 V 4= 365 V 8= 21,4 V Preamp 100 kohm trimmers are used to adjust bias to V1/7 and V2/2 Harry Kneckt 8.2.2007

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