The Maxon Company is probably most famous for manufacturing the legendary Ibanez Tube Screamer pedals (among many other Ibanez offerings). Because of this (and especially in non-Asian markets) Maxon pedals were often overshadowed by their Ibanez-branded brothers. But throughout the company’s history, they have produced a great offering of effects.
The Maxon OD880 Soft Distortion Overdrive was first produced in the mid 70s, and originals are very rare, especially in the West. It used 3 ICs (741 types) to produce a great transparent overdrive effect. The pedal was reissued in the 90s exclusively in Japan with an updated circuit that used 2 opamps. The layout below is for the original 3 IC version. I’ve added power filtering and polarity protection. It should fit just fine in a 1590B.
