Sharp GF-777 Restoration 夏普GF-777翻新 August 23, 2022August 15, 2023 by ddzheng I restored a Sharp GF-777, replacing all belts and friction wheels, and the pinch roller
80dB Noise Preamp August 22, 2022 by ddzheng A very high gain (80db or x10000) differential AC signal amplifier
