Power transformer Output transformer Drossel 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 PE 220u 25V + 220u 25V + 220u 25V + 220u 25V + + 22uF 450V + 22uF 450V Mallory 150 4n7F / 630V Mallory 150 10nF / 630V 22u 35V + 22u 35V + Mallory 150 0,1uF / 630V 22uF 350V + Mallory 150 4n7F / 630V 33uF 350V (F&T) + Mallory 150 22nF / 630V Mallory 150 22nF / 630V Mallory 150 22nF / 630V Mallory 150 22nF / 630V + 10uF 350V Mallory 150 47nF / 630V Mallory 150 47nF / 630V Mallory 150 22nF / 630V C11a J1High J3High J2 Low J4 Low R2 / 1M R3 / 68k R1 / 68k R8 / 68k R10 / 68k R9 / 1M R11 / 1k5 R13 / 1k5 R15 / 56k R5 /220k R12/220k R4 / 1k5 C1 C4 C20 C21 C19 C18 C17 C3 R37 / 22k C5 / 470p C9 / 47p C6 / 120p C2 R6 / 100k R38 / 10k R14 / 100k C7 C10 C8 R16 / 100k R7 / 100k R17 / 10k R18 / 220k C11 C12 R19 / 1M R20 / 1M R22 / 1k2 R21 / 47k R23 / 100k R24 / 100k R36 / 22k C13 C14 R25 / 2M2 R26 / 2M2 C15 V5 V6 V4 V7 R32 / 100 R34 / 100 R33 / 100 R35 / 100 R27 / 1k5 R28 / 1k5 R29 / 1k5 R30 / 1k5 V1 V2 V3 P2 / A500k (Volume Normal) Normal Top Boost P1 / A500k (Tone) P3 / A500k (Volume Top Boost) P5 / A1M ( Treble) P4 / A1M (Bass) P7 / A220k Stereo (Master) P6 / A500k (Cut) J7 8Ohm J8 16 Ohm J5 Send J6 Return SW4 Hot/Cool (Tonestack Bypass) SW3 Tone Bypass F1 Primary Fuse 3A slow F2 HT Fuse 500mA slow SW1 Power LA1 V9 5V 285V 6,3V shielded wire Star ground BU1 Power jack w/ fuseholder connect shield to ground PE connect shield to ground R31(A) 270R (3W) C16(A) C16(B) C16(C) C16(D) R31(D) 270R (3W) R31(C) 270R (3W) R31(B) 270R (3W) Connect if no FX-Loop is installed Upright Part Hammond 1441-20 Lower Part Hammond 1441-30 Layout AC30 Normal and Top Boost Channel by Markus Breier, last edited: 17.01.2014 to Choke