DHT filament supply board
DHT filament regulator
I'm planning to rebuild my 4P1L paralleled amplifier. My previous was a normal DC filament supply. I wish to try filament bias this time , and I built a DHT…
Discrete R2R DAC (part 3)
From part 2, I mentioned about the first stage of circuit, and here's the D-latch stage. As mentioned earlier, I choose 74AC574, because of its low internal switch resistance. I…
Discrete R2R DAC (part 2)
My first test was 16bit using DIP and through-hole on vero board. It works well at its first fire up. In-fact, I read Sonic Illusions R2R DAC page for reference,…
DIY ring core SPDIF transformer
In my Cirrus Logic CS8416 SPDIF to I2S board design , I want to include a SPDIF transformer to avoid ground loop problem . Although there're a lot of others…
DIY R2R DAC
Discrete R2R DAC (part 1)
I wanted to design a R2R DAC long time ago. I'm aiming for simple discrete design with 74 series logic ICs. After a long planning, I finally built 2 versions…
DIY 2A3 in red color
2A3 SE Amplifier
I received a request from a friend who want a 2A3 SE amplifier. Here's the 2A3 I build for him. I used 6E6P as driver stage. The 6E6P are long…