I’m an electronic hobbyist since I was young, and start building vacuum tube amplifies and speakers since 35 years ago. I repair, design and build audio equipments now , as my part-time job too.


DIY projects described in this site involved in potentially lethal electric currents. I will not responsible for any injury, kill you or your friends, family members, acquaintances, total strangers, pets, electronic devices or burn down your house etc.


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