i know this isnt a headphone amp but i use it to drive my headphones and speakers, i have a Yamaha A-560 natural sound stereo solid state amplifier that the right channel has gone completely dead on, i know i could fix it, but i need to know where to start, the right is fine, it comes through...

Hi all! with this i make my first post, I'm planning on building a headphone amp for outdoor use and had always loved the idea of tube amps and their cool retro styling, however as many of us know said tube amps are generally heavy massive pieces of desktop equipment. Enter the sub mini pentode...