A blog about vintage amps, pedals and their working. For over 20 years I’ve been dissecting amps, pedals and guitars to see what makes them tick! And I love a good mystery! So dive together with me in the information I can dig up from various places (both digital and analog) to tell you more on the units I work on. My main addictions are Fuzz pedals, Chorus pedals and 50’s amps. And the rarer, the better
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Articles of interest
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The Ibanez PT-900 and PT-999; the beginning
Ibanez introduced the PT-900 in 1974 as its first effect pedal that was sold nationally as internationally. Inside mimicking the MXR phase 90 and housed in a blue box, it was an instant succes.…
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MAStex Lesli Elektro Hamonix Phpse Shifter; Turkish delight!
I love weird pedals. And this is one weird pedal! This MAStex Lesli pedal is a Turkish pedal. When it came in, it was a mess. It didn’t do anything. It was ‘worked on’…
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Voodoolabs – Tremolo (4 knob version)
This pedal came in for some TLC. Multiple versions were made with two and three knobs, although the 4 knobbed version is the most common. Voodoolabs produced this to emulate the sound of a…
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CMOD OD; my own take on a classic!
Sometimes I try to design something for myself. So to end the CMOS OD appreciation for now, I give you this. A CMOS OD box for cleanish boosts, EQ’ed boosts, low gain or a…
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Snarling Dogs – Black Dog
Did I mention that I love CMOS overdrives?This beauty came in a long time ago, This Snarling Dogs Black Dog was build in the USA by Charlie Stringer. It is an EHX Hot Tubes…
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Monarch – MTO-22 Tube Driver
CMOS overdrive appreciation post number three: the Monarch MTO-22 Tubedriver. This beauty was sold under different names and brands as it is also known as the Aria ATO-1 Tube Overdrive, the Ken Multi MTO-7…
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EHX – Hot Tubes CMOS overdrive – Nano
After my former post people asked me about the Nano version of the EHX Hot Tubes CMOS Overdrive pedal. Prior to this I already published the schematic at Freestompboxes.org. This pedal is a…
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EHX – Hot Tubes CMOS overdrive
Recently this pedal came to my door. I’ve always been a big fan of the EHX Hot Tubes pedal and CMOS overdrive pedals, but this little unit just sounds even better. The EHX Hot…

