DIY IWISTAO 6N3 Vacuum Tube Preamplifier Finished Board SRPP Circuit

This is a finished vacuum tube preamplifier board with standard SRPP circuit and built with acrylic plate preamplifier tube uses 6N3, and the rectifier uses 6Z4 tube rectifier, and a dedicated toroidal transformer. 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. #iwistao #tube preamplifier #srpp circuit