An old super rare DBA pedal which was a two channel fuzz. Here is the transistor channel which resmebles most older DBA designs; cascaded reverse beta transistor gain stages. Socketing your transistors is a must since you need to find ones that doesn't gate too much. Also, there is a Filter control which is a variation of twin notch filter. Shape control is a simple ground lift for the filter circuit.
A big thank you to Nils at Moonn Electronics for the trace!
Schematic is avaiable HERE.
Based on the Box of Hall circuit but tuned a bit darker and wider range for the Tone and Feedback controls.
Schematic is avaiable HERE.
A Rosac Nu Fuzz done EQD style... Heavily modified values compared to the stock Rosac schematic that is floating around online. It suggest that it should have more volume on tap and a tone control with much wider range than its ancestor.
Schematic is avaiable HERE.
For those who don't want the whole Spires circuit with all the offboard wiring comes two separate öayouts for each channel. The red channel is a modified silicon fuzz face with some additional filtering and a fuzz control at the input. MPS3704 transistors seems to be not that common but a quick equivalent search reveals that they are NPN silicon transistors with a minum Hfe at 300. So 2N5088s or the BC54x family might begood subs if you don't have the stock transistors on hand.
Schematic is avaiable HERE.
A glitchy fuzz with the ability to produce some bad tracking octave down. The key is to play with your guitar volume and tone controls.
Here is a useful little circuit that can be used before or after your favorite dirtbox. It is basically a Green Ringer circuit with a buffered clean blend.
Schematic is avaiable HERE.
