4 20 0 RobRobinette.com 1 watt JCM800 with a 12AU7 true push-pull power tube. 1 ELL1 127 V1 12AX7 127 B9A 9-Pin Socket 320 1,2,3,4,5,6,7,8,9 CHASSIS ELL1 127 ELL1 127 Eyelet71 Grommet Cap Can 127 _270 NAME V3 12AU7 127 B9A 9-Pin Socket 320 1,2,3,4,5,6,7,8,9 CHASSIS W51 127 THREE true -1 _18 false Board1 127 true TwoPoints SQUARE Eyelet1 Eyelet1 Eyelet1 W4 127 TWO true -1 _28 false W4 127 TWO true -1 _28 false Eyelet1 Eyelet1 Eyelet1 W3 127 FOUR true -1 _22 false Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Power DPST 127 SPST VERTICAL Power DPST 127 SPST VERTICAL 1A SB Fuse & Holder 127 Power Transformer 127 Eyelet71 Grommet Eyelet71 Grommet Eyelet39 Eyelet39 Eyelet32 Bolt Eyelet50 Jack 12A Eyelet50 Jack 11 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 Pad1 ROUND _1 .022uF 630v Bass 127 NAME false Directional false _63V false Tone Slope 127 VALUE false Directional false HALF _4_BAND Tubular V3B Grid Leak 127 VALUE false Directional false HALF _4_BAND Tubular V3A Grid Leak 127 VALUE false Directional false HALF _4_BAND Tubular 10K 1W 127 NAME false Directional false HALF _4_BAND Standard V3 Cathode 127 VALUE false Directional false HALF _4_BAND Tubular V3A Plate Load 127 VALUE false Directional false HALF _4_BAND Tubular V4B Grid Leak 127 VALUE false Directional false HALF _4_BAND Tubular V4A Grid Leak 127 VALUE false Directional false HALF _4_BAND Tubular W3 127 FOUR true -1 _20 false W3 127 FOUR true -1 _20 false L2 LTP PI false CENTER CENTER DEFAULT L2 PI Tail false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L2 Treble false CENTER TOP _270 L2 V3B Grid Leak false CENTER TOP _270 L2 Power Amp false CENTER CENTER DEFAULT L2 RR800M JCM800 MICRO false CENTER CENTER DEFAULT L2 PI Cathode false RIGHT CENTER _270 W3 50 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false W27 127 FOUR true -1 _22 false W53 127 FOUR true -1 _22 false V2 12AT7 127 B9A 9-Pin Socket 320 1,2,3,4,5,6,7,8,9 CHASSIS 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 W35 127 FOUR true -1 _20 false L4 V2 12AX7 false CENTER CENTER DEFAULT L6 Fil 1 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 L4 V4 12AU7 false CENTER CENTER DEFAULT L1 Push-Pull Power Tube false CENTER CENTER DEFAULT J3 127 NAME false false W59 127 SEVEN true -1 _18 false W60 127 FOUR true -1 _16 false Preamp Volume 127 _180 LOG ThroughHole false ShaftDown L2 Output Transformer Hammond 125B 5 Watt false CENTER CENTER DEFAULT L1 Preamp 3 & Cathode Follower false CENTER CENTER DEFAULT L1 Safety false CENTER CENTER DEFAULT L4 Black = Hot false LEFT CENTER DEFAULT L4 Green = Safety Ground false LEFT CENTER DEFAULT L1 Ground Bolt false CENTER CENTER DEFAULT L1 6.3V false CENTER CENTER DEFAULT W12 127 FOUR true -1 _22 false W21 127 THREE true -1 _24 false L4 Power Transformer 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 10" 8 Ohm Speaker false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Tip false CENTER CENTER DEFAULT L2 Aux Speaker false CENTER CENTER DEFAULT Pad3 ROUND _1 Pad3 ROUND _1 Eyelet71 Grommet Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 L1 1A Slow Blow Fuse false CENTER CENTER DEFAULT W57 127 THREE true -1 _18 false W9 127 FOUR true -1 _22 false W28 127 FOUR true -1 _20 false W28 127 FOUR true -1 _22 false W21 127 FOUR true -1 _20 false W21 127 FOUR true -1 _22 false W1 127 THREE true -1 _26 false L1 Power false CENTER CENTER DEFAULT L2 A RobRobinette.com design based on the Marshall JCM800 V3.1a false RIGHT CENTER DEFAULT L4 White = Neutral false LEFT CENTER DEFAULT L1 Use Hammond 125B Yellow and Orange Wires false LEFT CENTER DEFAULT W1 127 FOUR true -1 _26 false Mid 127 _180 LIN ThroughHole false ShaftDown L1 DPST false CENTER CENTER DEFAULT L4 Power Cord false CENTER CENTER DEFAULT L5 See https://robrobinette.com/RR2104_Master_Volume_Micro.htm false RIGHT CENTER DEFAULT L5 O on caps indicates outer foil false RIGHT CENTER DEFAULT L5 All resistors 1/2 watt 10% unless specified false RIGHT CENTER DEFAULT W3 127 FOUR true -1 _22 false L2 Tone Slope false CENTER CENTER DEFAULT Dot4 V3B Plate Load 127 VALUE false Directional false HALF _4_BAND Tubular W3 127 FOUR true -1 _22 false 1.2K 2W 127 NAME false Directional false HALF _4_BAND Standard .022uF 630v Coupling 127 NAME false Directional false _63V false L2 O false CENTER CENTER DEFAULT W28 127 FOUR true -1 _22 false .022uF 630v Coupling 127 NAME false Directional false _63V false W53 127 FOUR true -1 _22 false J3 127 NAME false false 820 3W 127 NAME false Directional false HALF _4_BAND Standard V4B Grid Stopper 127 VALUE false Directional false HALF _4_BAND Tubular V4A Grid Stopper 127 VALUE false Directional false HALF _4_BAND Tubular L6 Fil 2 false CENTER CENTER DEFAULT L2 Power Tube Cathode false CENTER TOP _270 L1 HV false CENTER CENTER DEFAULT L2 A (B+1) false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false J2 127 NAME false Directional false J2 127 NAME false Directional false MV 127 _180 LOG ThroughHole false ShaftDown Dot4 V2B Cathode 127 VALUE false Directional false HALF _4_BAND Tubular V2A Cathode 127 VALUE false Directional false HALF _4_BAND Tubular W21 127 FOUR true -1 _22 false .022uF 630v Coupling 127 NAME false Directional false _63V false L2 PI Plate Loads 1W false CENTER CENTER DEFAULT L2 Grid Stopper false CENTER CENTER _270 L2 B (B+2) false CENTER CENTER DEFAULT L2 Grid Leaks false CENTER CENTER DEFAULT L2 Choke Classictone 40-18040 4H 50ma false CENTER CENTER DEFAULT L1 Primary false CENTER CENTER DEFAULT L2 NFB false CENTER CENTER _270 L2 V2B Cathode false RIGHT CENTER _270 L2 V2A Cathode false RIGHT CENTER _270 L2 O false CENTER CENTER DEFAULT L2 V3A Grid Leak false CENTER CENTER _270 L4 Marshall 2104/JCM800 With 12AU7 Power Tube In A Princeton Reverb Chassis false CENTER CENTER DEFAULT L1 NFB false CENTER CENTER DEFAULT L2 Grid Stopper false CENTER CENTER _270 W51 127 THREE true -1 _18 false W5 127 FOUR true -1 _18 false false Dot4 Dot4 W58 127 THREE true -1 _18 false L2 Choke false RIGHT CENTER DEFAULT L2 Choke false LEFT CENTER DEFAULT L2 OT Center Tap false LEFT CENTER DEFAULT L6 Fil 1 false LEFT CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT W34 127 FOUR true -1 _20 false L6 Fil 1 false CENTER CENTER DEFAULT L2 Dropping false CENTER CENTER _270 NFB 127 VALUE false Directional false HALF _4_BAND Tubular W3 127 FOUR true -1 _20 false L2 A false CENTER CENTER DEFAULT L2 B false CENTER CENTER DEFAULT L2 C false CENTER CENTER DEFAULT L3 JJ 40/20/20/20 500V false CENTER CENTER DEFAULT L2 GND false CENTER CENTER DEFAULT L2 B+ false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false L2 Dropping false CENTER CENTER _270 W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false L4 V3 12AX7 false CENTER CENTER DEFAULT L1 LTP Phase Inverter false CENTER CENTER DEFAULT L5 Princeton Reverb Chassis false RIGHT CENTER DEFAULT L2 OT false LEFT CENTER DEFAULT L2 OT false LEFT CENTER DEFAULT W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false .1uF 200v AC Shunt 127 NAME false Directional false _63V false Presence 127 _180 LIN ThroughHole false ShaftDown 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 Presence-Poly 127 VALUE false Directional false _63V GND2 DEFAULT DEFAULT L2 O false CENTER CENTER DEFAULT L2 Input Jacks false CENTER CENTER DEFAULT L1 1 false CENTER CENTER DEFAULT L1 2 false CENTER CENTER DEFAULT L1 3 false CENTER CENTER DEFAULT W3 127 FOUR true -1 _20 false Bass 127 _180 LOG ThroughHole false ShaftDown L1 Output Transformer false CENTER CENTER DEFAULT L1 Choke false LEFT CENTER DEFAULT L1 22.5K:8 Ohm false CENTER TOP DEFAULT L1 4H 50ma false CENTER TOP DEFAULT L2 Use Star Washer On Presence Pot false CENTER CENTER DEFAULT L4 Safety Slack false LEFT CENTER DEFAULT L2 Existing Chassis Hole false CENTER CENTER DEFAULT L2 Y false CENTER CENTER DEFAULT L2 X false CENTER CENTER DEFAULT L2 U false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L2 - false CENTER CENTER DEFAULT L2 Existing Chassis Hole false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT Eyelet39 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 Eyelet1 L1 Output Transformer false CENTER TOP DEFAULT L2 Warehouse Guitar Speakers 10" Green Beret false CENTER CENTER DEFAULT W5 127 FOUR true -1 _18 false false Mounting Hole 127 Mounting Hole 127 Mounting Hole 127 Pilot Light 127 DEFAULT 180 Input 2 127 DEFAULT 0 SWITCHED true L1 Drilled New Hole false CENTER TOP DEFAULT L2 Mounting false CENTER CENTER DEFAULT L2 Hole false CENTER CENTER DEFAULT L2 Hole false CENTER CENTER DEFAULT L2 Mounting false CENTER CENTER DEFAULT L2 Hole false CENTER CENTER DEFAULT High Input Jack 127 DEFAULT 60 SWITCHED true W1 127 THREE true -1 _26 false W1 127 FOUR true -1 _20 false W51 127 THREE true -1 _18 false W51 127 THREE true -1 _18 false W5 127 FOUR true -1 _18 false false W52 127 THREE true -1 _18 false W5 127 FOUR true -1 _18 false false W51 127 THREE true -1 _18 false Treble 127 _180 LIN ThroughHole false ShaftDown W12 127 FOUR true -1 _22 false W2 127 FOUR true -1 _22 false W2 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false V1 12AX7 127 B9A 9-Pin Socket 320 1,2,3,4,5,6,7,8,9 CHASSIS W12 127 FOUR true -1 _22 false W27 127 FOUR true -1 _22 false W53 127 FOUR true -1 _22 false W11 127 FOUR true -1 _22 false Dot4 V1A Cathode 127 VALUE false Directional false HALF _4_BAND Tubular W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false Dot4 Mounting Hole 127 V1A Grid Stopper 127 VALUE false Directional false HALF _4_BAND Standard W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false L4 V1 12AX7 false CENTER CENTER DEFAULT L6 Fil 1 false CENTER CENTER DEFAULT L6 Fil 2 false CENTER CENTER DEFAULT L1 Preamp 1 & Cold Clipper 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 L6 A false CENTER CENTER DEFAULT L6 B false CENTER CENTER DEFAULT L2 V1B Cathode false RIGHT CENTER _270 L2 V1A Cathode false RIGHT CENTER _270 L2 Mounting false CENTER CENTER DEFAULT L2 Hole false CENTER CENTER DEFAULT Input 127 VALUE false Directional false HALF _4_BAND Standard Mounting Hole 127 L2 1 High false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT L2 Chassis false CENTER CENTER DEFAULT L2 Preamp false CENTER CENTER DEFAULT L2 Mounting false CENTER CENTER DEFAULT L2 Hole false CENTER CENTER DEFAULT W11 50 FOUR true -1 _22 false W21 127 FOUR true -1 _22 false .022uF 630v Coupling 127 NAME false Directional false _63V false L2 V1B Plate Load false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT Treble 127 VALUE false Directional false _63V false W3 127 FOUR true -1 _22 false W11 50 FOUR true -1 _22 false 10K 2W 127 NAME false Directional false HALF _4_BAND Standard .022uF 630v Mid 127 NAME false Directional false _63V false W1 127 THREE true -1 _26 false V1B Cathode 127 VALUE false Directional false HALF _4_BAND Tubular L2 O false CENTER CENTER DEFAULT Bypass 127 VALUE false Directional false _63V true L2 Bypass false CENTER TOP _270 W1 127 TWO true -1 _20 false L2 Use Star Washer On High Input false CENTER CENTER DEFAULT L2 Input false CENTER TOP DEFAULT W3 127 FOUR true -1 _22 false W1 127 THREE true -1 _26 false Attenuator 127 VALUE false Directional false HALF _4_BAND Tubular W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false .022uF 630v Coupling 127 NAME false Directional false _63V false L2 O false CENTER CENTER DEFAULT W12 127 FOUR true -1 _22 false V2A Grid Leak 127 VALUE false Directional false HALF _4_BAND Tubular Treble Peaker 127 VALUE false Directional false HALF _4_BAND Tubular Treble 127 VALUE false Directional false _63V false W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false W1 127 THREE true -1 _26 false L2 V2A Grid Leak false CENTER CENTER DEFAULT L2 Treble Peaker false CENTER TOP DEFAULT L2 Grid Stopper false CENTER CENTER _270 Treble Peak 127 VALUE false Directional false _63V false W1 127 THREE true -1 _26 false W12 127 FOUR true -1 _22 false 100K 1W 127 NAME false Directional false HALF _4_BAND Standard J3 127 NAME false false W12 127 FOUR true -1 _22 false L2 Dropping false CENTER CENTER DEFAULT W28 127 FOUR true -1 _22 false W3 127 FOUR true -1 _22 false L2 C (B+3) false CENTER CENTER DEFAULT L2 Treble Peaker false CENTER CENTER DEFAULT W21 127 FOUR true -1 _22 false L2 V1A Plate Load false CENTER CENTER DEFAULT Rectifier 127 VALUE false Directional false 1N4007 Rectifier 127 VALUE false Directional false 1N4007 Rectifier 127 VALUE false Directional false 1N4007 Rectifier 127 VALUE false Directional false 1N4007 L2 Solid State false CENTER CENTER DEFAULT L2 B+ false CENTER CENTER DEFAULT W3 127 FOUR true -1 _22 false W3 127 FOUR true -1 _20 false W3 127 FOUR true -1 _20 false L2 B (B+2) false CENTER CENTER DEFAULT L2 Preamp Ground Bus false CENTER CENTER DEFAULT L2 Tone Stack false CENTER CENTER DEFAULT W11 127 SEVEN true -1 _22 false 22uF 500V 127 NAME false Directional false _63V true 100K 1W 127 NAME false Directional false HALF _4_BAND Standard 100K 1W 127 NAME false Directional false HALF _4_BAND Standard Metal Film 127 VALUE false Directional false HALF _5_BAND Standard Carbon Comp 127 VALUE false Directional false HALF _4_BAND Tubular Metal Oxide 127 VALUE false Directional false HALF _5_BAND Standard L2 2 Low false CENTER CENTER DEFAULT L2 Mounting false CENTER CENTER DEFAULT L2 Metal Film false LEFT CENTER DEFAULT L2 Carbon Composition false LEFT CENTER DEFAULT L2 Metal Oxide false LEFT CENTER DEFAULT Bright 127 VALUE false Directional false _63V false W15 127 THREE true -1 _26 false W16 127 THREE true -1 _26 false L7 Bright Cap false CENTER CENTER DEFAULT L2 Ground false CENTER CENTER DEFAULT L2 Switch false CENTER CENTER DEFAULT W17 127 THREE true -1 _26 false Eyelet2 Bleeder/Divider 127 VALUE false Directional false HALF _4_BAND Standard W3 127 FOUR true -1 _18 true W18 127 THREE true -1 _26 false Bleeder/Divider 127 VALUE false Directional false HALF _4_BAND Standard W19 127 THREE true -1 _26 false 4.7K 2W 127 NAME false Directional false HALF _4_BAND Standard L2 C (B+3) false CENTER CENTER DEFAULT L2 Center Tap false CENTER CENTER DEFAULT L2 Elevated 6.3V false CENTER CENTER DEFAULT L8 Bleeder/Divider false CENTER TOP _270 L2 Ground Bolt false CENTER CENTER DEFAULT 10uF 100V 127 NAME false Directional false _63V true W20 127 THREE true -1 _26 false W22 127 THREE true -1 _26 false W23 127 THREE true -1 _26 false W24 127 FOUR true -1 _22 false W6 127 FOUR true -1 _18 false false W7 127 FOUR true -1 _20 false W8 127 FOUR true -1 _20 false PI Stability 127 VALUE false Directional false false _63V L9 Elevation false CENTER CENTER DEFAULT L10 65V Heater false CENTER CENTER DEFAULT L2 O false CENTER CENTER DEFAULT L11 Attenuator false CENTER TOP DEFAULT L2 D (B+4) false CENTER CENTER DEFAULT L2 Bridge Rectifier false CENTER CENTER DEFAULT L12 No HV Center Tap false CENTER CENTER DEFAULT L13 250V 50MA false CENTER CENTER DEFAULT L14 With 250V PT and Bridge Rectifier false CENTER CENTER DEFAULT L2 PI Stability false CENTER CENTER DEFAULT 2