Re: Green Citrus (for Orange Lovers)

Posted by johnk on May 28, 2014; 11:26pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Green-Citrus-for-Orange-Lovers-tp9872p10132.html

Jfets have a pinout of Drain Source and Gate. to measure the drain voltage, you just power up the pedal with 9 volts and measure the voltage with a volt meter from the Drain pin to Ground to bias it properly.
if you use sockets for the drain resistors (as specified in the layout) you just keep trying values until the drain measures 4.5V (1/2 of the power supply voltage). all Jfets generally measure differently so all of the resistors may or may not be the same value. I usually start with a 10-12K resistor and go from there.
a higher value will lower the voltage and a lower one will raise it. you're looking to get anywhere from 4.5V- 5V on all of the drains.