I built the preamp (2 channel) utilizing the AN6551 chip. the unit works, but it makes noise like I'm touching (with my finger) the input wire. the only way to stop the noise is to touch the ground point (0 volts). regardless of volume Pot setting. I am at wits end now, any Ideas? I've included the schematic. I am using a 15_+ (differential 30 VDC) regulated power supply.
OK I found the unit has to be enclosed in a metal housing, grounded. This stopped the noise.
But now the unit periodically "POPS", as heard through the output. Any Ideas on that?
OK I found the unit has to be enclosed in a metal housing, grounded. This stopped the noise.
But now the unit periodically "POPS", as heard through the output. Any Ideas on that?
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