GEO's Effects Schematics
Circuit Schematic and Assembly Instructions for a Unique Three-Oscillator Theremin Musical Instrument | PDF
Hot Tubes (Original) - Electro-Harmonix Hot Tubes (Original) - Audiofanzine
7 pedals, 14 tubes, how many did you... - Electro-Harmonix | Facebook
Guitar Effects Schematics & Projects
Electro-Harmonix Vintage Hot Tubes review - YouTube
Tracing Journal: Catalinbread Karma Suture (Germanium & Silicon)
Index of /diy/Schematics/Distortion Boost and Overdrive
EHX - Hot Tubes (original version) - freestompboxes.org
EHX Hot Tubes Nano
ELECTRO-HARMONIX HOTTUBES DIST SCH Service Manual download, schematics, eeprom, repair info for electronics experts
Index of /diy/Schematics/Fuzz and Fuzzy Noisemakers
Electro Harmonix Schematics, Service manual or circuit diagram £1.80 (~ $2.20 or €2.10)
Circuit Schematic and Assembly Instructions for a Unique Three-Oscillator Theremin Musical Instrument | PDF
Electro Harmonix Hot Tubes (Now Discontinued)
Building an Electro-harmonix LPB-1 from scratch | Hot Bottles
Frank Clarke: Hot Harmonics
Request: EH Hot Tubes - SabroTone
Electro Harmonix Schematics, Service manual or circuit diagram £1.80 (~ $2.20 or €2.10)
Index of /diy/Schematics/Distortion Boost and Overdrive
Frank Clarke: Hot Harmonics
Paul In The Lab: MXR Hot Tubes Stripboard Veroboard Layout - Craig Anderton Tube Sound Fuzz Variant
Electro Harmonix Schematics, Service manual or circuit diagram £1.80 (~ $2.20 or €2.10)
Index of /diy/Schematics/Distortion Boost and Overdrive
