/diy/ - Do It Yourself

>>1777034
Naw man, class d sucks imo. Sure it has its advantages, being small and power efficient, but it processes signals to a higher degree using A/D converters/PWM. Fine for power control or motors where it's fucking fantastic but the goal of a great amplifier is to reproduce an input signal accurately with minimal changes. This means no d/a or pwm conversion, good snr and low distortion (imd/thd/timd). Tubes, transistors, opamps...whatever, they control an analog signal and are purer, when built for the purpose. The LM3876 for example is a ridiculously good part for the price and soundspretty good to boot.
>>1777031
Check the power supply. Electrolytic capacitors may look ok but test bad. Usually people replace them as a matter of course in older gear as they are prone to drying out as they age and can destroy rectifiers or even the transformer, norwithstanding frying other shit first.

Additionall since the idea interests me, are you considering a linear tracking tonearm? How do you propose to keep tracking? I would cut a softer msterial than vinyl then copy it over to a resin that cures with a hardness and strength surpassing vinyl. Plastics/resins have come a long way and this could potentially be a good way to create records that are durable and indestructable.