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I made my own angry charlie, including PCB layout. Mostly using SMD components. It works well, however it does generate a fair amount of noise when engaged and was wondering if it's because of my layout or if this pedal does generate lots of noise due to the nature of the circuit. My PCB has 4...

I found a few GT308A PNP Germanium transistors and they all work. I was wondering what kind of hFE should I be aiming for for the first transistor? Also, anyone knows how to measure leakage? Do I need a Peak DCA75? Or would any multi-tester do?

Any chance the Hydra delay has a schematic we can look at?

on Son of Ben, looking at the schematic and instructions for the various trimmer adjustments: - Trim1, can I replace R5 with a 12K (1%) and remove T1 all together? - Trim 2 and trim 3: can I remove R9 and R12, along with T2 and T3, and replace VCC with a direct 4.0V supplied voltage say VB that...

Anyone built this one or was able to compare with the RAH? I noticed an additional cap at the input (270pF to ground, and 100nF inline instead of a 3.3nF inline and no cap to gnd), and a different cap in the tone stack (4.7nF instead of 47nF). It seems the Prince ALbert is more a copy of the...

They are Schottky with a reverse voltage of 20V; it's unclear if they are critical. Especially Vout is 27V so it seems a bit strange. Unless I don't understand their use.

In the Duocast schematic, does anyone know what the SJ1 switch does in the power section? Is it activated manually? Is it always ON? The voltage switch is a SPDT so it is likely in one of the footswitch. I am guessing the bypass-footswitch is turning this switch on when the effect is engaged...