Boss SD-2 Crunch Channel
Per request. Schematic is avaiable HERE and a verified layout for the Lead Channel is avaiable HERE.
Boss
Boss SG-1 Slow Gear
The Slow Gear emulates a guitarist riding the volume pot or a volume pedal, creating a swell effect. This will fit comfortably in a 1590B or 125B, though with the 1590B you’ll probably want to wire the pots off board or use long-leg right angle pots mounted on the component side. Here’s the schematic for reference.
BOSS: DC Power Filtering
While I was looking at a few Boss circuits recently, I was reminded of some of the DC filtering they use. I thought I might try it in LTspice for a look, as my oscilloscope is pretty basic, so I can’t test it properly on the bench. So if you are ever having trouble with … Read more
BOSS: OD-1 Overdrive
A classic Boss overdrive – the one that started it all for Boss guitar effects, originally sold from 1977 to 1985. This is one of the later designs that does not use the quad opamp. Kind of curious that after this, many designs used the Boss version of a discrete opamp that can be seen in several … Read more
MARSHALL: Blues Driver / Boss Discrete Opamp
If you’ve read any recent posts, you may have noticed that I’m experimenting with discrete opamps – specifically replacing standard opamps with simplified discrete opamps – I’ve only played with the Joe Davisson diode compression opamp so far (with some success). While I was checking out DIY Stompboxes, I saw Rob Strand was experimenting with the Boss discrete opamp … Read more
BOSS: FZ-3 Fuzz
Initially I wasn’t sure about doing a layout for the Boss FZ-3, as it isn’t the most popular fuzz out there – then looking at the schematic, it appears to be quite tweakable, so I thought why not make a start, and see where this goes. It has elements of a Tone Bender, a silicon Fuzz Face … Read more
BOSS: Modded DS-1, Diode Compression Opamp
A somewhat polarising classic – the Boss DS-1, with a slight twist, as this has the Joe Davisson discrete diode-compression opamp onboard instead of an IC. BOSS DS-1 DIODE COMP OPAMP – VERO LAYOUT BOSS DS-1 DIODE COMP OPAMP – WAMPLER STYLE JCM MODS This is what I ended up being happy with on the … Read more