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Updated Schematic - Groovewatt Tube (Valve) RIAA Phono Preamp | Tube
The Valve Wizard
HiFi Vacuum Tube MM/MC Phono Stage Preamp Board DIY Kit Ref to Germany
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Tube Phono Pre-amp
Borbely RIAA Preamp With Tubes - A Project Remembered and Revisited
Spice and the art of preamplifier design, Part 2