4 9 0 RobRobinette.com No reverb, no tremolo, single channel AB763 Vibroverb 1 Eyelet1 Bias Board 127 true TwoPoints SQUARE Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Board1 127 true TwoPoints SQUARE Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 W3 127 FOUR true -1 _22 false Standby 127 SPST VERTICAL Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Standby 127 SPST VERTICAL Standby 127 SPST VERTICAL ELL2 127 Bias Balance 127 _90 LIN ThroughHole true ShaftUp Power Transformer 127 V5 127 OCTAL 5Y3 50 PCB Eyelet71 Grommet Eyelet71 Grommet Eyelet39 Eyelet39 Eyelet32 Bolt Eyelet50 Jack Eyelet50 Jack Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad2 ROUND _1 Pad2 ROUND _1 Eyelet50 Jack Eyelet50 Jack Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 .1uF 630v Bass 127 NAME false Directional false _63V false .047uF 630v Mid 127 NAME false Directional false _63V false C1 127 VALUE false Directional false _63V 100K 1W 127 NAME false Directional false HALF _4_BAND Tubular 100K 127 VALUE false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular 25uF 25v 127 NAME false Directional false _63V true W1 127 FOUR true -1 _26 false W1 127 FOUR true -1 _26 false 25uF 25v 127 NAME false Directional false _63V true W1 127 FOUR true -1 _26 false W1 127 FOUR true -1 _26 false R1 127 VALUE false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular 470 127 NAME false Directional false HALF _4_BAND Tubular .1uF 200v AC Shunt 127 NAME false Directional false _63V false NFB 127 VALUE false Directional false HALF _4_BAND Tubular 82K 1W 127 NAME false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular R1 127 VALUE false Directional false HALF _4_BAND Tubular W3 127 FOUR true -1 _20 false W3 127 FOUR true -1 _20 false W3 127 FOUR true -1 _20 false 20uF 500v 127 NAME false Directional false _63V true 20uF 500v 127 NAME false Directional false _63V true 20uF 500v 127 NAME false Directional false _63V true 220K 1W 127 NAME false Directional false HALF _4_BAND Standard 220K 1W 127 NAME false Directional false HALF _4_BAND Standard J2 127 NAME false false J2 127 NAME false false J2 127 NAME false false J2 127 NAME false false L2 PI Plate Load false CENTER CENTER _270 L2 LTP PI false CENTER CENTER DEFAULT L2 PI Tail false CENTER CENTER DEFAULT L2 V1B Plate Load false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L2 Treble false CENTER TOP _270 L2 V1B Cathode false RIGHT CENTER _270 L2 Bypass false CENTER TOP _270 L2 Bypass false RIGHT TOP _270 L2 V2A Grid Leak false CENTER TOP _270 L2 V2B Grid Leak false CENTER TOP _270 L2 *NFB false CENTER CENTER _270 L2 Power Amp Ground false CENTER CENTER DEFAULT L2 Preamp Ground Bus false CENTER CENTER DEFAULT L2 RR763 BLACKVIBE false CENTER CENTER DEFAULT L2 V1A Cathode false RIGHT CENTER _270 L2 PI Cathode false RIGHT CENTER _270 100uF 350v 127 NAME false Directional false _63V true 100uF 350v 127 NAME false Directional false _63V true J2 127 NAME false Directional false W3 50 FOUR true -1 _22 false W3 127 FOUR true -1 _20 false W3 127 FOUR true -1 _22 false V1 127 B9A 12AY7 320 PCB W11 127 FOUR true -1 _22 false W12 127 FOUR true -1 _22 false W27 127 FOUR true -1 _22 false W28 127 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false W53 127 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false V1 127 B9A 12AY7 320 PCB W11 127 FOUR true -1 _22 false W12 127 FOUR true -1 _22 false W27 127 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false W53 127 FOUR true -1 _22 false V4 127 OCTAL 6L6GT 50 PCB V3 127 OCTAL 6L6GT 50 PCB W9 127 FOUR true -1 _20 false W13 127 FOUR true -1 _22 false W14 127 FOUR true -1 _22 false W34 127 FOUR true -1 _20 false W35 127 FOUR true -1 _20 false Grid Stopper V4 127 VALUE false Directional false HALF _4_BAND Tubular W9 127 FOUR true -1 _20 false Grid Stopper V4 127 VALUE false Directional false HALF _4_BAND Tubular L6 1 false CENTER CENTER DEFAULT L4 V1 12AX7 false CENTER CENTER DEFAULT L6 Fil 1 false CENTER CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT L6 9 false CENTER CENTER DEFAULT L6 1 false CENTER CENTER DEFAULT L4 V2 12AT7 false CENTER CENTER DEFAULT L1 LTP Phase Inverter false CENTER CENTER DEFAULT L6 Fil 1 false CENTER CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT L6 9 false CENTER CENTER DEFAULT L6 1 false CENTER CENTER DEFAULT L6 1 false CENTER CENTER DEFAULT L4 V3 6L6GC false CENTER CENTER DEFAULT L4 V4 6L6GC false CENTER CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT L6 Fil 1 false CENTER CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT L6 Fil 1 false LEFT CENTER DEFAULT L1 Push-Pull Power Tubes false CENTER CENTER DEFAULT L6 Grid Stopper false CENTER CENTER DEFAULT L6 3 false CENTER CENTER DEFAULT L6 3 false CENTER CENTER DEFAULT L6 4 false CENTER CENTER DEFAULT L6 4 false CENTER CENTER DEFAULT L6 5 false CENTER CENTER DEFAULT L6 5 false CENTER CENTER DEFAULT L6 6 false CENTER CENTER DEFAULT L6 6 false CENTER CENTER DEFAULT L6 Grid Stopper false CENTER CENTER DEFAULT L6 8 false CENTER CENTER DEFAULT L6 8 false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false 470 3W 127 NAME false Directional false HALF _4_BAND Standard 470 3W 127 NAME false Directional false HALF _4_BAND Standard J3 127 NAME false false W3 127 FOUR true -1 _20 false W13 127 FOUR true -1 _22 false W52 127 FOUR true -1 _18 false W51 127 FOUR true -1 _18 false W46 127 FOUR true -1 _18 false W47 127 FOUR true -1 _18 false W48 127 FOUR true -1 _18 false W45 127 FOUR true -1 _18 false W59 127 SEVEN true -1 _18 false W60 127 FOUR true -1 _16 false Volume 127 _180 LOG ThroughHole false ShaftDown Treble 127 _180 LOG ThroughHole false ShaftDown Bass 127 _180 LOG ThroughHole false ShaftDown L2 OT 125A7A Classictone 40-18006 false LEFT CENTER DEFAULT L6 Screen false CENTER CENTER DEFAULT L6 Screen false CENTER CENTER DEFAULT L1 Preamp 1 & 2 false CENTER CENTER DEFAULT L2 HT Center Tap false CENTER CENTER DEFAULT L1 Standby false CENTER CENTER DEFAULT L1 Safety false CENTER CENTER DEFAULT L4 Black = Hot false LEFT CENTER DEFAULT L4 Green = Ground false LEFT CENTER DEFAULT L1 Ground false CENTER CENTER DEFAULT L1 Bolt false CENTER CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT L1 6.3v false CENTER CENTER DEFAULT L6 1 false CENTER CENTER DEFAULT L4 V5 GZ34 false CENTER CENTER DEFAULT L1 B+ DC Out false CENTER CENTER DEFAULT L1 Rectifier false CENTER CENTER DEFAULT L6 8 false CENTER CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT L6 4 false CENTER CENTER DEFAULT L6 6 false CENTER CENTER DEFAULT L6 2 false CENTER CENTER DEFAULT R1 127 VALUE false Directional false HALF _4_BAND Standard W3 127 THREE true -1 _24 false R1 127 VALUE false Directional false HALF _4_BAND Standard R1 127 VALUE false Directional false HALF _4_BAND Standard W3 127 THREE true -1 _22 false Bright 127 SPST VERTICAL W2 127 FOUR true -1 _22 false W2 127 FOUR true -1 _22 false W2 127 FOUR true -1 _22 false L2 2 Low false CENTER CENTER DEFAULT L2 1 High false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Switch false CENTER CENTER DEFAULT L2 Switch false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT L2 Bright false CENTER CENTER DEFAULT W12 127 FOUR true -1 _22 false W12 127 FOUR true -1 _22 false W11 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false 470 2W 127 NAME false Directional false HALF _4_BAND Standard 1N4007 127 NAME false Directional false 100uF 100v 127 NAME false Directional false _63V true W3 127 FOUR true -1 _22 false W51 127 FOUR true -1 _18 false J2 127 NAME false false ELL2 127 W51 127 FOUR true -1 _18 false W51 127 FOUR true -1 _18 false W21 127 THREE true -1 _24 false L2 Note Polarity false CENTER CENTER DEFAULT L4 Power Transformer 125P5D false CENTER CENTER DEFAULT L2 Pilot Light false CENTER CENTER DEFAULT L2 To All 6.3V false CENTER CENTER DEFAULT L2 Fil false CENTER CENTER DEFAULT L2 Bias Board false CENTER CENTER DEFAULT L2 D Filter false CENTER CENTER DEFAULT L2 Filter false CENTER CENTER DEFAULT L2 Bias Rectifier false CENTER CENTER DEFAULT L2 15" 8 Ohm Speaker false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Switch false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT L2 Aux Speaker false CENTER CENTER DEFAULT Pad3 ROUND _1 Pad3 ROUND _1 Eyelet71 Grommet Eyelet1 Eyelet1 L1 2A Slow Blow Fuse false CENTER CENTER DEFAULT W57 127 FOUR true -1 _18 false W58 127 FOUR true -1 _18 false W9 127 FOUR true -1 _22 false W28 127 FOUR true -1 _22 false W28 127 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false W11 127 FOUR true -1 _22 false W3 127 FOUR true -1 _20 false W1 127 THREE true -1 _26 false L1 Power false CENTER CENTER DEFAULT L1 OT 125A7A 4k:8 Ohm false CENTER TOP DEFAULT L2 A RobRobinette.com design based on the Fender AB763 Vibroverb V1.42 false RIGHT CENTER DEFAULT L2 Grid Stoppers false CENTER TOP DEFAULT L2 Input false CENTER TOP DEFAULT L2 6.3V Center Tap false CENTER CENTER DEFAULT L4 White = Neutral false LEFT CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT R1 127 VALUE false Directional false HALF _4_BAND Standard W1 127 TWO true -1 _20 false W31 127 SEVEN true -1 _20 false W31 127 SEVEN true -1 _20 false R1 39 VALUE false Directional false HALF _4_BAND Tubular R1 37 VALUE false Directional false HALF _4_BAND Tubular W1 127 THREE true -1 _26 false W1 127 FOUR true -1 _26 false Mid/Raw 127 _180 LOG ThroughHole false ShaftDown L1 DPST false CENTER CENTER DEFAULT L1 5v Heater false CENTER CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT L1 Twist false CENTER CENTER DEFAULT L2 C Filter false CENTER CENTER DEFAULT L2 B Filter false CENTER CENTER DEFAULT L2 A Filter false CENTER CENTER DEFAULT L2 A Filter false CENTER CENTER DEFAULT L2 Note Polarity false CENTER CENTER DEFAULT L4 Power Cord false CENTER CENTER DEFAULT L2 Grid false CENTER CENTER DEFAULT L2 Plate false CENTER CENTER DEFAULT L2 Cathode false CENTER CENTER DEFAULT L2 Cathode false CENTER CENTER DEFAULT L2 Grid false CENTER CENTER DEFAULT L2 Plate false CENTER CENTER DEFAULT L2 Plate false CENTER CENTER DEFAULT L2 Plate false CENTER CENTER DEFAULT L2 Cathode false LEFT CENTER DEFAULT L2 Cathode false CENTER CENTER DEFAULT L2 Grid false CENTER CENTER DEFAULT L2 Grid false CENTER CENTER DEFAULT L2 6.3V Center Tap (if needed) false LEFT CENTER DEFAULT L2 Bias -55V false CENTER CENTER DEFAULT L5 See https://robrobinette.com/AB763_Model_Differences.htm false LEFT CENTER DEFAULT L1 355-0-355VAC false CENTER CENTER DEFAULT L2 + false CENTER CENTER DEFAULT L2 + false CENTER CENTER DEFAULT L5 O on caps indicates outer foil false LEFT CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L5 All resistors 1/2 watt 10% unless specified false LEFT CENTER DEFAULT L5 Fender cap specification was 400V unless specified false LEFT CENTER DEFAULT W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false W2 127 FOUR true -1 _22 false L2 Tone Stack false CENTER CENTER DEFAULT L2 Tone Slope false CENTER CENTER DEFAULT L2 D (B+4) false CENTER BOTTOM DEFAULT L4 No Reverb No Tremolo Single Channel Vibroverb false CENTER CENTER DEFAULT .001uF 630v Coupling 127 NAME false Directional false _63V false W1 127 TWO true -1 _26 false W1 127 FOUR true -1 _26 false J2 127 NAME false Directional false J2 127 NAME false Directional false Dot4 Dot4 Dot4 L2 O false CENTER CENTER DEFAULT L2 V1A Plate Load false CENTER CENTER DEFAULT 100K 1W 127 NAME false Directional false HALF _4_BAND Tubular L2 A (B+1) false CENTER CENTER DEFAULT L2 B (B+2) false CENTER CENTER DEFAULT L2 C (B+3) false CENTER CENTER DEFAULT 100K 1W 127 NAME false Directional false HALF _4_BAND Tubular 4.7K 2W 127 NAME false Directional false HALF _4_BAND Standard W3 127 FOUR true -1 _22 false 2.2K 2W 127 NAME false Directional false HALF _4_BAND Standard L2 C (B+3) false CENTER CENTER DEFAULT L2 Balance/Bleeder false CENTER TOP _270 L1 SPST false CENTER CENTER DEFAULT L6 A false CENTER CENTER DEFAULT L6 B false CENTER CENTER DEFAULT L2 465V false CENTER CENTER DEFAULT L2 460V false CENTER CENTER DEFAULT L2 450V false CENTER CENTER DEFAULT L2 410V false CENTER CENTER DEFAULT W1 127 FOUR true -1 _20 false 6.8K 127 NAME false Directional false HALF _4_BAND Tubular W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false R1 127 VALUE false Directional false HALF _4_BAND Standard W3 127 FOUR true -1 _22 false L2 Ground false CENTER CENTER DEFAULT L2 Chassis false CENTER CENTER DEFAULT L2 Preamp false CENTER CENTER DEFAULT L40 Classictone 40-18029 false CENTER CENTER DEFAULT L2 Mid Minimum false CENTER TOP DEFAULT L2 Power Tube false CENTER CENTER DEFAULT .1uF 630v Coupling 127 NAME false Directional false _63V false L2 O false CENTER CENTER DEFAULT W28 127 FOUR true -1 _22 false Bias 127 DEFAULT LIN NAME FLAT_SMALL R1 127 VALUE false Directional false HALF _4_BAND Standard L2 Max Bias false LEFT CENTER DEFAULT L2 Bias & Balance false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false GND1 DEFAULT DEFAULT L2 Bias Trim Pot false CENTER CENTER DEFAULT L2 <- Grounded to pot false LEFT CENTER DEFAULT L2 <- Grounded to pot false LEFT CENTER DEFAULT .1uF 630v Coupling 127 NAME false Directional false _63V false L2 O false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false L2 Grid Leak false CENTER CENTER DEFAULT L2 Choke 125C1A 90ma 4H Classictone 40-18003 false LEFT CENTER DEFAULT L2 Clockwise = Hotter Bias false CENTER CENTER DEFAULT C1 127 VALUE false Directional false _63V 1N4007 127 NAME false Directional false 1N400 W1 127 FOUR true -1 _26 false W1 127 FOUR true -1 _26 false 1N4007 127 NAME false Directional false false 1N400 W1 127 FOUR true -1 _26 false W1 127 FOUR true -1 _26 false Presence 127 _180 LIN ThroughHole false ShaftDown W3 127 FOUR true -1 _22 false Presence 127 BOTH false Directional false HALF _4_BAND Tubular W39 127 THREE true -1 _26 false W1 127 TWO true -1 _26 false W1 127 THREE true -1 _26 false Poly 127 VALUE false Directional false _63V GND2 DEFAULT DEFAULT L1 Backup false CENTER CENTER DEFAULT L1 Diodes false CENTER CENTER DEFAULT L1 1 false CENTER CENTER DEFAULT L1 2 false CENTER CENTER DEFAULT L1 3 false CENTER CENTER DEFAULT L2 By RobRobinette.com false CENTER CENTER DEFAULT L4 Add Presence Control false RIGHT CENTER DEFAULT L2 *Use 39K NFB Resistor On Amps With 100 Ohm NFB Tail Resistors false LEFT CENTER DEFAULT L2 *Use 82K NFB Resistor On Amps With 47 Ohm NFB Tail Resistors false LEFT CENTER DEFAULT 2