60-Watt Solid-State Guitar Amplifier PUBLIC

60-watt Solid-State Guitar Amplifier with 3-Band Tone.

60-watt solid-state guitar amplifier circuit with 3-band Fender-style tone-stack. Controls Include: Drive, Bass, Mid, Treble, Stack Sum, Pre-Gain, Post-Gain, and Volume. No fuzz, distortion, or other effects except for the tone-controls. Should be operated cleanly, for best results. Range at or above 0 dBV for IC1 is from 40 Hz to 8.2 kHz with all of IC1's controls at 50%. However, turning controls above 50% will extend bandwidth in both directions. Maximum gain from IC1, measured at the input of IC2, is only +9.2 dBV (Vo/Vi = 2.9) @ 250 Hz with all of IC1's controls at 50%, or up to +36 dBV (Vo/Vi = 63) @ 1 kHz with all of IC1's controls at 100%; more than enough to overdrive the input of IC2, which is said to produce acceptable overdriven distortion. Also, IC2 can provide additional gain up to +17 dBV (Vo/Vi = 7) with the Post-Gain control at 100%. However, do not use the circuit with all controls at 100% except as a brief worst-case test during breadboarding. And though simulator verified, treat the circuit as experimental in nature. Breadboard test it before committing to a soldered build. And house it in a grounded metal enclosure. Power-supply not shown. Requires two dual-polarity supplies; one regulated +-12V DC @ 50 to 250 mA for IC1, and one unregulated +-24V DC @ 5 A for IC2. And use an actual 8-ohm guitar-speaker rated >= 60W RMS. Example: Eminence Patriot series, model "Red White and Blues", 12", 120W, 8 ohm. Sound described as purely American vintage 60s & 70s Rock, with tight lows, smooth mids, and sparkling highs. Available at https://www.parts-express.com , #290-814, $127.99.