Boss FA-1 FET Amplifier
Slightly modified, subbing the two single op amps of the original to a dual. 1458 or 4558 should match the spec of the original ones.
Pre-amp
Dinosaural OPA-101 Overdriven Pre Amp
Just traced by Aion Fx as their Ixuea project. This layout is slightly modified compared to the original pedal. First, stock units had a fixed low pass filter before the volume control. The resistor in the filter is now replaced by an external tone control. Secomd, it is wired for true bypass with the input … Read more
Echoplex EP-3 Pre Amp / Aion Ares
Aions Ares project which is based on Echoplex EP-3 Pre Amp which includes an onboard voltage doubler for more headroom. Schematic and info on J FET selection avaiable HERE. ‘Note that there is two ground connections on the board, the purpose is to reduce any potential noise from the charge pump. Those wires can be … Read more
Sunn Beta Pre Amp
Ok, let’s release the beast. Two layouts. One stock for iether Bass or Lead cap values. And another one with a Beta/Lead switch. Since I’m not a big fan of offboard wiring I decidied to simplify things a bit. Lead cap values is always in circuit and with a 4PDT switch you can switch in … Read more
Xotic BB Pre Amp
Two layouts for this one. One stock and one with an additional Mid control. The clipping diodes is placed on the side of the board so you can easily add a diode clipper switch. Just omit the diodes on the board and add wires tat pad 1M and 1N to a DPDT switch where you … Read more