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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.
 20201020_152236 |  20201020_152241 |
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 20201020_152315 |  20201020_152312 |
 20201020_152307 |  20201020_152256 |
 20201020_152302 |  20201020_152251 |
 20201020_145219 |  20201020_145229 |
 20201020_163703 |  20201020_163714 |
 20201020_163708 |  20200526_084337 |
 20201020_163659 |  20201020_163654 |
 20200526_140457 |
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