![]() Run the 10 ohm resistor (R16) from the 12VAC source (probably a trafo in most cases) straight to the heaters. There’s also been reports of this being quite noisy, and I’m happy to pass on coi2001’s suggested fix leave the heater resistor off the board since that’s the main noise source. Update (): Thanks to several of you for verifying this one! ![]() Don’t do it if you’re not sure how to do it safely. Use a small mains transformer or a good 12v AC power supply, and be careful when playing with mains power. I really should draw a proper diagram for this.ĭo note that this effect requires 12v AC power and not DC like most other effects. The wiring explanation is a bit convoluted as well, sorry. The effect uses a preamp tube of type ECC83 / 12AX7, and I guess you would need some ventilation in your enclosure. I left as much space as I felt was necessary for the large supply caps, but I’m afraid it could still end up being a bit crowded. Here’s an overdrive pedal that uses an actual preamp tube, which is quite exciting.īased on Bajaman’s schematic I created a layout with wiring for the tube pins (since I can’t imagine a tube socket fitting neatly on a piece of vero board).
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