I completely removed the power supply from my headphone amplifier. I built a Lt1083 regulated +-15v power supply to power the amp. here are pictures. I haven't hooked it up as yet. The transformer is 80VA, dual 18V secondaries. Filter caps., 10,000uF, dual bridge discrete diodes. I will post updates when I get time to do some more work on the unit.
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I've finally finished the power supply and amplifier. The new power supply took the amplifier to a different lever of performance. I removed all the power supply parts from the original design. I don't really like the sound of LM3xx regulators, too harsh and noisy.
Don't expect miracles by just replacing passive components. The heart of every audio system is the power supply, so that's why I spent so much time building the best sounding power supply for the amp. The improvements especially in the bass areas are nothing short of subwoofer quality deep and controlled. Music comes out of a dark silent background with authority and fullness. The power supply is fully adjustable and is very stable and runs very cool.
Additional changes that I made to the amp are input caps are polypropylene in oil, power rail caps are Panasonic FM 680uF and 470uF bypassed with .1uf, silver mica caps input to ground on op amp. I will roll op amps to hear what suits me best. I also replaced the phone sockets with Neutrik gold plated. My objective is to address areas that make the most significant difference in sound.
I'll probably sell this amp and move on to the next project. If you have questions, just email me.
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