I wanted to use a spare cell-phone charger 5vdc instead of a bulky AC wall-wart to power a headphone amp. Could I use a RKZ-0512 which supplies +-12vdc, +-80ma, unregulated This device is intended for IGBT op-amps, not audio circuits. Would it be a disaster?
The amp is just a pair of NJM4556 as a buffer with gain, whatever you call that.
The supply has LM317LZ,LM337LZ to produce a clean +-9vdc, 100ma max. The 10uf caps are Kemet Aluminum Organic Polymer said to be low ESR. The PCB was single-layer from SEEED. Not sure about the necessary filtering, I left a few thru-holes to add more caps. They did not seem necessary
I have no professional equipment to measure this hack. But my ears tell me there is no obvious noise or distortion. As an experiment, it is satisfactory.
The amp is just a pair of NJM4556 as a buffer with gain, whatever you call that.
The supply has LM317LZ,LM337LZ to produce a clean +-9vdc, 100ma max. The 10uf caps are Kemet Aluminum Organic Polymer said to be low ESR. The PCB was single-layer from SEEED. Not sure about the necessary filtering, I left a few thru-holes to add more caps. They did not seem necessary
I have no professional equipment to measure this hack. But my ears tell me there is no obvious noise or distortion. As an experiment, it is satisfactory.
