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David Morrin
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About
Modular Synth
Banana Jack Color Code
Modular Guitar Effects
Modules
Boss PH-3 Module
CV Matrix Mixer
Dual ADSR EG
Dual Delay
Dual LFO
Dual Mixer + Banana Converters
Dual State Variable VCF
Dual VCO
MFOS Noise Toaster and Weird Sound Generator
Noise + S/H + Counter
PAiA MIDI2CV8
Quad AR EG
Quad Divide
Quad VCA
My Modular Synthesizer
Test Equipment
Tube Amp
Bench Box
Light Bulb Limiter
Portable Dummy Load
Speaker Box
Troubleshooting
Audio Probe
Basic Electronics
Audio Amplification Basics
Basic Op Amp Circuits
Diodes
Impedance
Basic Impedance Info
Battery and Resistor as Source and Load
General Audio Impedance Info
Guitar Impedance
Kirchhoff's Laws
Ohm's Law
Op Amps
Passive Filter Circuits
Potentiometers
RC Filters
Resistors
Thevenin's Theorem
Vacuum Tubes
Voltage Division and Simple RC Filters
Guitar Tech
Alligator Clip Adapter
BC Rich
Dual Distortion Preamp
Fishman SWT
Gibson Howard Roberts
Gittler Preamp
Pickup Wiring
Beatle Bass
Parallel Wiring
Passive Octave
Series Wiring
Strat 5 Way Pickup Selector + Series/Parallel Switch + Bypass + Split
Tone Cap Auditioner
Tone Controls
Peavey Troubleshooter
Transistors
Amplifiers
Altec 1592A
Common Emitter with Series Feedback
Attenuators
Common Base
Common Collector
Common Emitter
Delay
Filters
Noise Generators
Oscillators
Phase Shifter
Rectifiers
Troubleshooting Bipolar Junction Transistors
Germanium Transistors
What's hfe?
Troubleshooting Amplifiers
3 Prong Conversions
Ampeg BA Series
dc Offset
Fender Amp Footswitch with LEDs
Fender Harmonic Vibrato
Matching Power Transistors
Overpowering Speakers
Polytone Amps
Roland Jazz Chorus
Solid State History
Tech 21 Trademark 60
Tube Amp Bias
Univox BT-505 Bass Amp
Westbury Model 250
Yamaha G30-112
Troubleshooting Effects
Astro Amps Astrotone
Auto Wah & Envelope Filters
BK Butler Tube Driver
Boss OD-1 Overdrive
Boss OD-2 Turbo Overdrive
Boss SD-1 Super Overdrive
Bypass Schemes for Effects Pedals
Effect Cancel
Electronic Toggle Switches
Mechanical Switching
Relay Switching
Transistors as Electronic Switches
Colorsound Overdriver
Conrad Buzz Box and Volume Expander
Craig Anderton Tube Sound Fuzz
Dan Armstrong Blue Clipper
Dan Armstrong Orange Squeezer
Delay
BBD History
Distortion/Overdrive
CMOS Distortion
Op Amp Distortion and Overdrive Topologies
DOD 250 Overdrive Preamp
DOD 515 Sustain
DOD 680 Analog Delay
DOD FX13 Gonkulator
Durham Electronics Sex Drive
EKI 826 Fuzz Box
Electro Harmonix Bad Stone
Electro Harmonix Big Muff Pi
Noisy Big Muff V2-4
Electro Harmonix Electric Mistress
Electro Harmonix Guitar Synthesizer
Circuit Board Connections
Electro Harmonix Hare-Lip
Electro Harmonix Memory Man
Bucket Brigade Delay
CD4047
EC 2000 Deluxe Memory Man Reissue
EC 2002
EH 1307 Deluxe Memory Man with Squelch
EH 1307B
EH 1309A - Memory Man
EH 1309B Memory Man
EH 1343B
EH 7500 Memory Man
EH 7550 Deluxe Memory Man SAD1024 Version
EH 7810 Memory Man
EH 7811 Stereo Memory Man
EH 7811B Stereo Memory Man with Chorus
EH 7811C Stereo Memory Man
EH 7850 Deluxe Memory Man with Chorus/Vibrato
EH 7850C
Misc Notes
NE570 Compander IC
EH 7550 Calibration
EH 7850 Calibration
EH 7850 Troubleshooting Tips
Electro Harmonix Micro Synthesizer
Electro Harmonix Muff Fuzz
Electro Harmonix Poly Chorus
Electro Harmonix Small Clone
Fender Blender
Fender Blender 3 Knob
Filters
Foxey Lady
Foxx Tone Machine
Fulltone '69
Fuzz
Fuzz Topologies
2 Stage Fuzz Blend
2 Transistor English Fuzz
BJT to Diode Frequencer Doubler
Cascaded Linear Amplifiers
Gated
No Bias
Op Amp Frequency Doubler Fuzz
Passive Shunt Clipping Diodes
Push-Push Amp Frequency Doubler
Ring Modulator Fuzz?
Shunt Feedback Clipping Diodes
Transformer to Diode Frequency Doubler
Fuzz Face
Gregory ADD-VERB
Gretsch Controfuzz
Gretsch Expandafuzz
Guyatone VT-3
Heathkit TA-28 Fuzz Booster
Hiwatt Custom Tape Echo
Ibanez 850 Overdrive
Ibanez Tube Screamer
Line 6 DL4
Disassembly
DL4 Footswitch
No Power
Tactile Switches
Maestro Fuzz Tone
Maestro PS-1 Phase Shifter
Maestro USS-1 Universal Synthesizer System
Marshall Time Modulator
Maxon OD-880
Mutron Octave Divider
MXR Distortion +
MXR Phase 100
MXR Phase 90
Nu-Fuzz Distortion Blender
Octave Up
Op Amps for Effects Pedals
Bob Widlar
Pearl Octave
Pedal Hall of Fame
Phasers
Power Jack Protection Schemes for Effects Pedals
Power Supplies For Effects
Discrete Transistor Power Supplies
Unregulated Supplies
Zener Regulator
Proco Rat
Roger Mayer Concorde + Treble Booster
Roger Mayer Octavia
Helios Input Module
Roger Mayer Page 1
Roland AG-5 Funny Cat
S. Hawk Ltd Hawk II Tonal Expander and Hawk III Bass Expander
Sekova No. 59 Distortion Box
Selmer Buzztone
Shin-Ei FY-2 Fuzz Box
Siemens W295B EQ Module
Sola Sound Tone Bender
Tone Bender History
Sunn Buzz SB-1G
Systech Envelope Follower
Tycobrahe Analog Delay Line
Tycobrahe Octavia
Univox Square Wave
Univox Superfuzz
Univox Uni Comp
Univox Uni Fuzz
Univox Unidrive
Univox Univibe
Vox MKIII Preamp Distortion
Vox Tone Bender
Wah
Troubleshooting Keyboards
Arp Odyssey
Electro Harmonix Mini Synthesizer
Mattel Optigan
Moog Prodigy
Quick Tuning
Tuning
Moog Sonic Six
Musser Ampli Celeste
Rhodes
David Morrin
Peavey Troubleshooter
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