Several years ago, this amplifier had been designed for one of my kit set. I believe that some of you might have seen this before in Taiwanese web page. Not much here, just a gallery of my previous work and some simple test result.
This is my prototype PCB for easier construction.
All metal casing with epoxy paint. Pre-installed with power transformer and terminals.
This is my homebrew prototype output trans with 4 layers of primary and 3 layers of secondary.1kohm : 8 ohm.
Here's how I hide the ugly OPT.
Everything looks simple with double sided PCB.
Response of 100Hz.
1 KHz square wave.
And here's 10KHz square wave.
The output power is 2.5W before clipping and distortion is around 3.8% at 2W rms.
Schematics :
