Here's the new boost from Matt Hoopes. Cornish buffer up front, so like the DRV, not a true bypass effect unless you want to wire it tha...

Here's Jackson Audio's MOSFET boost, the Amp Mode. Pretty simple MOSFET circuit with a BJT output buffer. Easy fit in a 1590B. 

 Thought this one was interesting so I gave it a go. It's a fairly typical Rockett overdrive (.45 Caliber, Animal, Blue Note, etc.) with...

 Happy 2022, everyone! Here's a buffer/booster from Fulltone. Engaged it's a booster with an interesting controllable germanium soft...

Hope everyone's staying safe and healthy. Today's layout is a unique preamp booster from Spaceman Effects, the Atlas III. It uses so...

Got a little booster circuit that should go together pretty easily. It's pretty much an Electra without clipping diodes and a large valu...

What's everyone think of SMD? It seems more and more boutique builds are going that route, and with more parts only be available in SMD ...

Had a couple requests for this one. Very cool design and story behind this circuit. Note, the 120pF cap right below the Boost pot, and the 1...

This one's a monster of a boost. Runs off ~36 volts, which is converted internally from a 9v supply (don't try and run it off a 12 o...

Got a little simple boost/preamp for your Thursday. Should be a pretty easy fit in a 1590A. J113 alternatives would be J201, 2N5457, and pro...

For Fuzz Friday here's the coolest Green Ringer + Rat pedal around! (To be fair, it's an awesome combo) The Green Ringer is on a JFE...

Got a request for this one for Fuzz Friday. Fairly simple fuzz + boost box. Originals used PNP silicon transistors, but you can use NPNs jus...

Originally a bit of a flop from Boss, the FET Amplifier was made famous by U2's The Edge. It features a 2-band Baxendall tone stack and ...

Here's Jamie's take on the classic Rangemaster circuit, with a NPN germanium transistor. There's an added toggle to switch betwe...

Here's a simple MOSFET-based booster circuit that'd be a nice alternative to the SHO. Should fit in a 1590A. FYI, the 1N4739 diode i...

I traced this one a while back and created the Lawn Darts PCB over on the store from it. About time I made a perf and etch layout. If a Ran...

The JHS Haunting Mids is an EQ circuit that controls the mid frequencies along with giving a 10dB clean boost. From the JHS site: The M...

Here's a really cool and versatile dirt pedal design by Pink Jimi Photon. He's made a lot of contributions to the DIY community and ...

Essentially a Rangemaster with a switch selecting the input cap (Hi/Lo) and another switch (Ge/Si) selecting between a germanium or silicon ...

This is a rare one from the early 90s from Way Huge and is based on the Craig Anderton Frequency Booster. Stock it gives a mid range boost (...