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Update: Simple 5687-based preamp - diyparadise

Update: Simple 5687-based preamp - diyparadise

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Update: Simple 5687-based preamp - diyparadise
Simple 5687-based preamp - diyparadise

Simple 5687-based preamp - diyparadise

Single Ended 5687 amplifier Photo #4740200 - US Audio Mart

Single Ended 5687 amplifier Photo #4740200 - US Audio Mart

Audio Note M7 Line Preamp?? - diyAudio

Audio Note M7 Line Preamp?? - diyAudio

7868 Tube Amp Schematic

7868 Tube Amp Schematic

5687 (2C51) preamp | Technik

5687 (2C51) preamp | Technik

Update: Simple 5687-based preamp - diyparadise

Update: Simple 5687-based preamp - diyparadise