DIY IWISTAO 6N3 Vacuum Tube Preamplifier Finished Board SRPP Circuit
This is a finished vacuum tube preamplifier board with standard SRPP circuit. The preamplifier tube uses 6N3, and the rectifier uses 6Z4 tube rectifier. The background noise is better controlled, making sound better. The board is debugging-free, simple to make and design is reasonable, the noise is relatively low, also there is no impulse current at startup, and a speaker protection circuit is added.
Photos step by step
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