Coming soon… 😉 Thinking about independent shunt regulator for each rail, precision passive I/V, and tube output.... Read More

A relay in your audio path? Can’t imagine that before, although the practice is quite common on commercial audio application. The function of the relay in your audio path is...... Read More

Today, I drill some acrylic and heatsink to mount the regulator PCB. What a tiring drilling job! Not too easy to drill a lot of holes on the heatsink, though...... Read More

When it comes to high current and high efficiency, actually we don’t have much option rather than using switching based power supply. For most of consumer electronic equipment, this kind...... Read More

I got chance to try ASUS O!Play Air HDP-R3. Short words, it’s a digital storage player (you can use external HDD connected via USB or e-SATA or use the build-in...... Read More

I used to like “hook-type” probe used in oscilloscope , as this type is very convenient in testing small parts. You just hook the test clip and see the result...... Read More

Not completely done, but I could imagine the final appearance later. Enjoy! Only one last module left, the audio player as source. And off course, the speakers.... Read More

In the middle of the night, after finishing my tube rectifier dual socket modification, I prepare some tube rectifier to test the new socket. I think it’s gonna be nice...... Read More

My rectifier socket got problem, accidentally, the one of the pin was broken yesterday. So I fill this weekend to repair it. Since I used to use Octal and B4...... Read More

Today, I design the power supply module for my tiny amplifier project (check here and here for detail). The power supply are divided into three modules. One is for the...... Read More

My tiny newborn amp will not be alone. I will add a low voltage tube buffer as a nice companion. I just finish the module today. Powered by Russian 6N1P...... Read More

Ok, my newborn saw the world for the first time about 5 days ago, and I haven’t finished his first gift 😉 The main idea is to create an active...... Read More