Some PCBs

Here’s the current projects. Two Echo Base and two Casualty 4 Phaser shifters.

Old School Layouts

I found these old school layouts by Andy. These look like fun to build the layouts just scream mojo. I think I will have to etch a few of these up and build them with carbon comp resistors and ceramic…

Art of the Stompbox

Looks like one of my Ugly Face’s made it into the “Art of the Stompbox” exhibit at the Museum of Making Music in San Diego. http://www.museumofmakingmusic.org/index.php?option=com_content&task=view&id=282&Itemid=41

Sycophant

Here’s my take on the SHO. With crackle free knob. Adjust the value of C3 to create a range boost.

LM386 Gain

I’ve playing around with the 386 Audio Amplifier. This is a really great chip. It has a lot of possibilities. Looking at all of the great circuits that use this I’ve noticed there are many different ways to set the…

DIY Electronics Swap Meet 2010

Bay Area DIYer’s should make it to the DIY Swap meet on Feb 21 at 924 Gilman St in Berkley CA. For more info: The first three were a great time lot’s people with lot’s of stuff. Anyone from…

Stompbox PodCast

I had fun last week recording a Podcast with my pal Joe who put together some great series of sound clips highlighting various boosters. [audio:] Download

MosFET Range boost

Here’s a simple idea that you will work on almost every transistor circuit out there. We’ll apply it to the MosFET boost here. Remember the gain of the MosFET boost was determined by the Drain and Source resistors. For the…

MosFET Gain

Here’s a typical MosFET boost. The gain is roughly determined by the ratio of Drain and Source resistors. Divide the Drain resistor (Rd) by the Source resistor (Rs) to find the gain. For example if Rd = 5k and Rs…

What am I missing?

Assume there’s your favorite booster at the input, what is D2 doing? This is the most common clipping arrangement that I have seen. It seems that D2 does nothing. If the boost at the input is running off 9V then…