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Tube amps: build, repair, modify
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Effects and accessories
• Amp stand
• Clean boost
• Line out box
• Marshall JMP1 footswitch
Aiken switch schematic
• Rat/Tube Screamer comparison
• Zoom 9002 mixer
Guitar electronics
• Flexible strat wiring
• Pickup wiring
• Treble bypass
• Volume controls
Homebrews
• Challenger amp conversion
• Dirty little EL84 amp
6V6 vs. EL84 tones
• Dual channel amp
Photos
Sounds
• Electar Tube 10
• Low power amp
• PA conversion amp
Photos
Schematics
Sounds
• Phase inverters
• Tube preamp
Design notes
Modifications
• Bias
Adjustable cathode bias
Bias method switching
Convert to cathode bias
Dual bias control
• Converting a split-phase to a long-tailed pair phase inverter
• DC heaters
• Increasing the plate voltage of a split-load phase inverter (Stokes mod)
• Marshall 1 wire mod
• Master volume controls
• Paul C mod for Princetons
• Power reduction
Power scaling
Power scaling cascode
Pulling two tubes on amps with 4 power tubes
Triode converters
• Removing the Pull-Boost switch
• Silverface and blackface phase inverter differences
• Silverface tweed channel conversion
Repairs and maintenance
• Bassman 10
Bassman 10 UL schematic
• Bias measurement methods
• Current limiting
• Fender Super Champ footswitch
• Make a solid state rectifier
• Measuring bias
• Recapping an amp
• Replacing plastic Fender jacks
• Tweaking a SF Deluxe Reverb
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Tube amps: build, repair, modify
Bassman 10 UL schematic
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