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Richter Original Real-Tube Fuzzy Booster for Electric Guitar

Richter Original real-tube fuzzy booster for electric guitar. Controls Include: Gain, Drive-Tone, Drive, Fuzz, Tube-Tone, and Volume. A 2-stage op-amp section provides initial gain and tone with a low-noise dual op-amp IC (OA1 & OA2) chosen to ensure clean op-amp operation at any control setting. The fuzz is from two low-wattage low-voltage space-charge pentodes (V1 & V2). Here, OA2 can overdrive V1 depending on the Drive control setting, while V1 can overdrive V2 depending on the Fuzz control setting. Frequency Range for the op-amp section is 63 Hz to 22 kHz with all controls at 50%, but tube section Range is 85 Hz to 16 kHz. Perfect for 6-string electric guitar. Overall Gain = +20.7 dBV @ 1 kHz with all controls at 50%. Power-supply not shown. Requires a regulated single-polarity DC supply providing +12VDC @ >= 500 mA. And though the op-amp section was simulator verified, treat the entire circuit as experimental. Breadboard test before committing to a soldered build. Put the tubes on pads, to mitigate vibrational noise. And house project in a grounded metal enclosure. Example Power-Supply: 12V DC 1000 mA Regulated Switching Power Adapter, Product ID: 798. $8.95 each. https://www.adafruit.com Notes On The 12DZ6:
Warm, full‑bodied, with rounded-off highs. Less harshness in the mids, and with more openness in the upper mids than high-voltage tubes. Less dynamic range than high‑voltage tubes, making it sound more compressed in loud passages, but with a pleasant vintage‑style smoothness. Comparable to a 12AT7 in tone, but with slightly softer highs.