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Guitar Preamp Circuit Diagram
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Tube preamplifier schematic
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Preamp parallel triodes amp references
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Guitar preamp circuit using 12au7 .
![Guitar Preamp Circuit Diagram](https://2.bp.blogspot.com/-XtG9QxOfXNM/T-_C6TkbCWI/AAAAAAAABWs/4lOir5hOCfI/s1600/12AX7-12AU7-Tube-Preamp-Schematic.png)
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