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Vintage Stereo, Amplifier and Radio Restoration
title. Pioneer SX-939 AM/FM Receiver/Amplifier. 1974.
date of work. 2020
work. Cleaned. Replaced all capacitors (including filter capacitors) and problematic transistors. Balanced amplifier+Bias. Cleaned all controls. Replaced all lamps with low-power warm white LEDs. Rated at 70 (75) watts.
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