Function Generator Amplifier

Oftentimes, you need the ability to beef up the output of your function generator. Maybe, you need to drive a transformer winding or something with relatively low impedance. The source resistance of a typtical signal generator is way too high for such things. This amplifier will increase the output current and output voltage of the

Micro Superlead Circuit

This is an amp designed to emulate the sound of a Marshall Superlead, but at a much more reasonable volume and price. The circuit topology closely resembles the real Superlead circuit but with some changes to accomodate a lower HT (high-tension) voltage and a different output tube. There were also different versions of the Marshall

12AU7 Regenerative Radio

This is a HF valve (vacuum tube) radio kit from Thames and Kosmos. (The same people that make chemistry kits and hydrogen fuel cell kit cars.) It operates a 12AU7/ECC83 vacuum tube at low voltage. Most vacuum tubes require at least 90 volts on their anodes to operate normally. In most HiFi amps, it is

Synth Build: Cabinet and Metal Panels

I used three 10 foot tall 4/4s of cherry wood for the construction of this cabinet. A fair bit of preparation had to occur before I could even start making the actual cabinet. In order to get the proper width and height of the cabinet I had to rip, cross cut and glue quite a

Synth Build: Modeling the Chassis

This is a tentative physical model of what the modular synth is going to look like. I’ve created one VCO module an placed it where it will probably go in the final product. The labeling of the other modules is not very set in stone. One of the objectives of this prototype was to help