Posts filed under: DIY Audio

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 to prevent any unstable (or unpredictable) condition which may happens...
Continue Reading →
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 (not included the wrong holes one!). Finally, the PCB could...
Continue Reading →
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 of power supply probably one of the best choice. But...
Continue Reading →
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 card reader) and support RCA Composite or HDMI video output...
Continue Reading →
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 in the display. But why most multitester (Digital or Analog)...
Continue Reading →
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....
Continue Reading →
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 to evaluate the sonic of some rectifiers to 😉 Actually,...
Continue Reading →
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 based, why don’t I put two sockets to simplify my...
Continue Reading →
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 4x TBA820 (I stack 2 bridge diode to provide 3A...
Continue Reading →
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 tube and Russian K40Y capacitors. Some of the circuit inspired...
Continue Reading →
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 speaker, powered with Quad Amplifier TBA820, onboard MP3 Player, and...
Continue Reading →
I’m about to finalize this sound card mod. The output now is taken directly from the WM8770IFT, coupled with Jensen Copper Foil Paper Tube Capacitor (before it was Mundorf Silver/Gold/Oil). The sound improves quite a lot. Soon, I will add...
Continue Reading →