Musicparts.com logo

Electro-Harmonix

Schematics, Service Manuals and Owners Manuals


Please read our Ordering Information page before ordering!
All GREEN buy now button items = ONLINE & AVAILABLE NOW for same day download. (usually within the hour).
All OFFLINE buy now button items  (see Ordering Information page for details)


Electro-Harmonix BIG MUFF Pi Pedal Schematic
Contents: Schematics.
Note: This is the all transistor version, no IC's. (Dated 1975) ($15)
Electro-Harmonix EH-0400 Mini-Synthesizer Keyboard Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers (Dated 1974) ($20)
Electro-Harmonix EH-1313A Dirt Road Special Amplifier Schematic
Contents: Schematics (Dated 1978) ($15)
Electro-Harmonix EH-3003 Big Muff Pi Distortion Unit Schematic
Contents: Schematics.
Note: This is the all IC version. (Dated 1978) ($15)
Electro-Harmonix EH-3004 Attack Equalizer Pedal Schematic
Contents: Schematics.
Note: Identifing parts: 2 IC's & 2 Transistors. ($15)
Electro-Harmonix EH-3075 Hot Tubes Overdrive Effect Schematic
Contents: Schematics (Dated 1978) ($15)
Electro-Harmonix EH-4100 Doctor-Q Envelope Follower Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-4200 Zipper Envelope Controlled Follower Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-4800 Small Stone Phase Shifter (1975 version) Schematic
Contents: Schematics.
Note: This version has 6 IC's. (Dated 1975) ($15)
Electro-Harmonix EH-4800 Small Stone Phase Shifter (1978version) Schematic
Contents: Schematics.
Note: This version has only 5 IC's. (Dated 1978) ($15)
Electro-Harmonix EH-4801 Small Stone Phase Shifter (1978 version) Schematic
Contents: Schematics.
Note: This version has 3 IC's. (Dated 1978) ($15)
Electro-Harmonix EH-4900 Y Triggered Filter Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-5000 Frequency Analyzer Ring Modulator Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers.
Note: This is the original version, not the 1997 re-issue. ($15)
Electro-Harmonix EH-5100 Electric Mistress Flanger Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-5370 Clap Track Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-5701 Queen Wah Schematic
Contents: Schematics (Dated 1978) ($15)
Electro-Harmonix EH-5800 Bad Stone Phase Shifter Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-5900 Octave Multiplexer Effects Unit Box Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers (Dated 1975) ($15)
Electro-Harmonix EH-5901 Octave Multiplexer Effects Unit Pedal Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers (Dated 1975) ($15)
Electro-Harmonix EH-5950 Deluxe Octave Multiplexer Schematic
Contents: Schematics.
Note: This is the 5 knob version. (Dated 1978) ($15)
Electro-Harmonix EH-7500 Economy Memory Man Analog Delay Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-7700 Polychorus/Polyflanger/Echoflanger Schematic
Contents: Schematics, Calibration / Alignment Instructions, Semiconductor Generic Reference Numbers.
Note: This is the older AC line operated unit, not the newer wall adapter version. (Dated 1978) ($20)
Electro-Harmonix EH-7810 Economy Memory Man Echo + Chorus Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers (Dated 1978) ($15)
Electro-Harmonix EH-7811B Memory Man Stereo Echo / Chorus Schematic
Contents: Schematics ($15)
Electro-Harmonix EH-7850 Deluxe Memory Man Echo/Chorus/Vibrato Pedal Schematic
Contents: Schematics.
Note: Schematic quality is very poor on this one. ($15)
Electro-Harmonix EH-7900 Micro-Synthesizer Analog Synth for Guitar (w/NE5554) Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers.
Note: IMPORTANT! This is the version using a NE5554N 14 pin IC power supply regulator. (Dated 1978) ($20)
Electro-Harmonix EH-7900 Micro-Synthesizer Analog Synth for Guitar (w/RC4558) Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers.
Note: IMPORTANT! This is the version using a RC4558 8 pin IC power supply regulator. (Dated 1978) ($20)
Electro-Harmonix EH-7950 Bass Micro-Synthesizer MKII Analog Synth for Bass Schematic
Contents: Schematics, Semiconductor Generic Reference Numbers (Dated 1978) ($20)
Electro-Harmonix Electric Mistress Flanger (w/741) Schematic
Contents: Schematics.
Note: IMPORTANT! This is the version using a 741 IC power supply regulator. (Dated 1978) ($15)
Electro-Harmonix Electric Mistress Flanger (w/78L15) Schematic
Contents: Schematics.
Note: IMPORTANT! This is the version using a 78L15 IC power supply regulator. (Dated 1978) ($15)
Electro-Harmonix Flanger Flanger Schematic
Contents: Schematics (Dated 1976) ($15)
Electro-Harmonix Freedom Amp Schematic
Contents: Schematics.
Note: This amp was AC/DC portable and used 40 "D" sized batteries. Several cabinet styles: single speaker, twins & quads. (Dated 1975) ($15)
Electro-Harmonix LPB-1 Amplifier Schematic
Contents: Schematics ($10)
Electro-Harmonix Small Amp Amplifier Schematic
Contents: Schematics.
Note: This amp was AC/DC portable and used a 12V battery. Includes an alternate updated schematic. Also sometimes called the Freedom Brothers Amp. ($15)
Electro-Harmonix Wah-Wah Pedal Schematic
Contents: Schematics.
Note: 2 transistor version. ($15)

We are always looking for other models not listed here. Give customer service a call.


Electro-Harmonix Schematics, Service Manuals and Owners Manuals Archive