Gain with three triodes, and the sound was a little thin, too, so I am The previous design had two triode stages (with a switchable,Īdditional triode stage) and a cathode follower. Below is the schematic of the latest version. Have made some radical changes, and learned a helluva lot about triode Got some useful feedback on the Goldtooth Softy and possible uses, I Here's a new, simple design for a two-tube mic preamp. It really breaks up heavily with P-90 pickups. Here's a demonstration of the tone you can get from this design. Great for a bright tone on your guitar, I think. enough to push the front end of a guitar amp slightly. This little circuit gives, at most, 20 dB of gain. Nothing special here, just two simple RC-coupled gain stages with a "Big Muff Pi" style tone control between them. This time, a one-bottle variety, and running on 24VDC. (Note that the LM7809 regulated power supply - absolutely necessary! - is not shown.) I used a rail-to-rail quad opamp, the TS974.Ī simple notch filter using a nine-position rotary switch, a Cinemag 1.2H inductor, and plenty of love. This combies a simple Tube Screamer-style distortion pedal, a Big Muff-style tone control, and a notch filter (with switchable center frequencies) at the end.
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