RO OpATube II 2-Channel Preamp PUBLIC

Richter Original "OpATube II" 2-Channel Guitar Preamp

Same as RO OpATube 2-Channel Preamp but with a different tube. Here, the tube is a 12AL8 triode + pentode, which also operates with a single +12VDC supply-voltage on the plates AND their common heater. Specs are otherwise the same as in the first version of this project. Controls Include: Input Level, Ch 1 enable switch, OA Gain, OA Tone (Bass, MId-Center, Treble), Fuzz 1 enable switch, Fuzz 1 symmetry switches, Fuzz 1 Depth, OA Level, Ch 2 enable switch, Fuzz 2 enable switch, Tube Level, and master Blend. Example Power-Supply (not shown): 12V DC 1000 mA Regulated Switching Power Adapter, Product ID: 798. $8.95 each. From AdaFruit website. https://www.adafruit.com . The tube is available at The Tube Store. https://www.thetubestore.com .