idsnowdog
Imperator of Indignation
During the pandemic, my old microwave stopped working. Since nobody would take it, I had the bright idea to break it down into smaller pieces I could dispose of with my recycling. That was only partly successful. Although I eventually got rid of it.
While scrapping it I noticed the logic board had half a dozen A1266 transistors, so I salvaged them in hopes of one day building a fuzz pedal from them. This was at least two years before I started building pedals. The A1266 has a strange pinout Emitter/Collector/Base that few other transistors use. They are also PNP transistors to further complicate things.
Last week I found a schematic for a Maxon Treble Booster that used a transistor with the same pinout, so I built one and finished putting it together on Monday. I call it The Magic Chef in honor of my deceased, microwave.
Modifications to the circuit:
Reversed polarity to use the PNP A1266 instead of NPN 2SC828.
Added power filtering.
Added a second cascode A1266 to the output stage.
Added a third cascaded A1266 gain stage.
The input/output capacitors were changed to 4.7nF for a more useful frequency range.
Raised R4 to reduce gain and improve clarity.
C2 was added to filter out frequencies above 10Khz.
Changed the pot to 500K. 50K was weak and constipated.
Added a three-way mode switch to choose between single-transistor, two cascaded transistors, or two cascoded transistors.
While scrapping it I noticed the logic board had half a dozen A1266 transistors, so I salvaged them in hopes of one day building a fuzz pedal from them. This was at least two years before I started building pedals. The A1266 has a strange pinout Emitter/Collector/Base that few other transistors use. They are also PNP transistors to further complicate things.
Last week I found a schematic for a Maxon Treble Booster that used a transistor with the same pinout, so I built one and finished putting it together on Monday. I call it The Magic Chef in honor of my deceased, microwave.
Modifications to the circuit:
Reversed polarity to use the PNP A1266 instead of NPN 2SC828.
Added power filtering.
Added a second cascode A1266 to the output stage.
Added a third cascaded A1266 gain stage.
The input/output capacitors were changed to 4.7nF for a more useful frequency range.
Raised R4 to reduce gain and improve clarity.
C2 was added to filter out frequencies above 10Khz.
Changed the pot to 500K. 50K was weak and constipated.
Added a three-way mode switch to choose between single-transistor, two cascaded transistors, or two cascoded transistors.
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