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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
          • Memory Man Comparison Chart
          • 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

www.davidmorrin.com

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