Mad Professor Simble

This is been traced for a few weeks now over on FSB and I've meant to lay it out since then, but just now getting around to it. If you don't know, it's an amp-in-a-box type trying to emulate a Dumble amp. Apparently it sounds very good with smaller amps. Should fit nicely in a 1590B with board mounted pots as per usual.

Caline Purple Smoke

Got a little booster circuit that should go together pretty easily. It's pretty much an Electra without clipping diodes and a large value resistor between base and collector (similar to the EQD Arrows). Easy fit in a 1590B or even a 1590G (probably). Schematic on FSB.

AMZ Mini Booster SMD

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 form, I wonder how long before it'll be hard to get quality parts in through-hole packages. All that to say, here's a simple etch-able SMD layout of the AMZ Mini Booster. I've left the power polarity diode and power filter cap (folded onto its side) as through-hole as getting the right packages can sometimes be a royal PITA. All the caps and resistors are 0805 size and note that C3 is a non-polarized cap. Should fit easily into a 1590A.

Make a difference

SoloDallas Storm

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 10uF cap just above the LED are present in the original design, but not connected. Check out Aion's trace blog for more info and schematic. Also, use the 1981 DRV drill template for this one.

German Tooth Fuzz

If you've got a bunch of NPN germanium transistors kicking around, this Fuzz Friday's for you. Here's Zzoyd's adaption of the Basic Audio Spooky Tooth for use with germanium transistors. The first 2 stages each use 2 germaniums in a Darlington pair, with the 3rd stage using either a 2N7000 MOSFET or an NPN silicon transistor (pinout is CBE on Q5 if using a BJT in place of the MOSFET). Trimmers are for biasing the Darlington pairs, so adjust till it sound right to you.

Frantone Lo-Tone Classic Fuzz

Here's an interesting one from Frantone for Fuzz Friday. Think the first half of a Big Muff into an LM386. Schematic over on FSB here.