Highly Adjustable 3-Band Tone PUBLIC

Kurtus Richter's Highly-Adjustable 3-Band Tone-Control Circuit.

Highly-adjustable 3-band tone-control circuit designed by Kurtus Richter. Controls include: Drive, Treble Trim, Treble-Range switch (with 3 positions), Treble, Mid Center, Mid, Bass Trim, Bass-Range switch (with 3 positions), Bass, and Volume. Though verified, circuit should be considered experimental. Breadboard test before committing to soldered build. Suitable for stomp-box or rack-mount applications. Batteries can be replaced by a regulated dual-polarity +-9V DC power-supply providing 50 to 100 mA of available current. Total gains per frequency with all pots at middle positions, and using a 1 V p-p 1 kHz input signal, are; -14dBV @ 40Hz, -3dBV @ 63Hz, 0dBV @ 82Hz, +5dBV @ 100Hz, +14dBV @ 250Hz, +18dBV @ 1kHz, +16dBV @ 2.5kHz, +12dBV @ 4kHz, +7dBV @ 6.3kHz, 0dBV @ 10kHz, -5 dBV @ 16kHz, and -7.5dBV @ 20 kHz. Absolute maximum possible total circuit gain = +36dBV @ 1kHz. Thus, this circuit emphasizes mids to highs in an ideal range for 6-string electric guitar; 82Hz to 10kHz.