Showing posts with label 12au7. Show all posts
Showing posts with label 12au7. Show all posts
Thursday, August 28, 2014
12AU7 ECC82 tube Preamplifier circuit
The following chart is a simple two-line preamp with 12AU7 / ECC82 tube. The overall gain of the schema is about 8 , The second phase of the schema is a cathode followers and a low impedance amplifier. This schema is from the RCA tube manual.
![12AU7]()
The schema is simple and requires no special components. For the power supply, you can create a Hammond 370BX transformer with simple CLC or CRC filtering to B +. You want to use a good quality capacitor C4 for the best results.
The schema is simple and requires no special components. For the power supply, you can create a Hammond 370BX transformer with simple CLC or CRC filtering to B +. You want to use a good quality capacitor C4 for the best results.
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