Chuck D. Bones
Circuit Wizard
This is the Aion Andromeda, it's a Nobels ODR-1 with a BASS control similar to the Timmy's. PedalPCB sells the Nobleman, which is an exact replica of the ODR-1. I wanted the BASS control, and rather than mod a Nobelman, I went with the Andromeda. Aion makes one other optional mod: the hard clipping diodes can be a single anti-parallel pair, like the stock ODR-1, or four diodes in series-parallel for lighter hard clipping. I built mine with four hard clipping diodes: 1N4003's & 1N4148s. I fooled around with some of the other semiconductors, using BA482's for the soft clippers (higher Vf) and LM833s for the opamps (quieter than JRC4558's). I socketed the opamps in case I want to swap them out. I subbed a 2N5089 for the 2N5088 because that's what I had.
This pedal is a low-gain overdrive, really a dirty boost, in the same league as the Klon Centaur. Like the Klon, there are ton of parts for tone shaping. The ODR-1 is known to be quite bassy, in fact Nobels now offers the ODR-1 with a bass-cut switch inside. Aion went one better and put a BASS pot on the front panel. The SPECTRUM control is unique. Below noon it's a mild mid boost and above noon it's a mid cut. Unlike the Klon, there is no charge pump because none is needed. Unless you put a boost in front of this pedal, there is no way to saturate the opamps.
Note the complete lack of symmetry in the board layout. Take note HamishR: I went to special pains to align the main board perfectly in the box. ?
This pedal is a low-gain overdrive, really a dirty boost, in the same league as the Klon Centaur. Like the Klon, there are ton of parts for tone shaping. The ODR-1 is known to be quite bassy, in fact Nobels now offers the ODR-1 with a bass-cut switch inside. Aion went one better and put a BASS pot on the front panel. The SPECTRUM control is unique. Below noon it's a mild mid boost and above noon it's a mid cut. Unlike the Klon, there is no charge pump because none is needed. Unless you put a boost in front of this pedal, there is no way to saturate the opamps.
Note the complete lack of symmetry in the board layout. Take note HamishR: I went to special pains to align the main board perfectly in the box. ?