Pioneer SX-828 Stereo AM/FM Receiver

Pioneer SX-828 Stereo AM/FM Receiver

Fully restored in June 2025. We use ONLY hi quality audio grade parts, ordered at Mouser. No corner cutting to save a few bucks.

What was done:

Both filter capacitors have been replaced/upgraded to Cornell Dubilier 8200uF 75V (original caps are 8000uF 50V) with the same diameter to keep the original design and screw terminals (wiring/soldering reliability). Costly now, $54 / pair.

Power output transistors were replaced with Onsemi MJ21193G/MJ21194G

New Omron relay was installed to improve reliability.

ALL electrolytic capacitors have been replaced with audio grade Nichicon UPW, UKL, WIMA and Kemet film caps (<= 4.7uf) All tired resistors and diodes have been replaced with Onsemi, Fairchild. Many noisy and tired transistors were replaced: ALL power board, amp, preamp and AMX board. LED lamp upgrade to warm blue. Bias and DC Offset adjusted to specs. Measurements after restoration (see the last photo) show first channel = 24.54v, second = 24.05v and output: Channel 1: 75.3 W RMS Channel 2: 72.3 W RMS into 8 ohm. It's officially rated at 50 W/channel. The front is in perfect condition, but top of the faceplate has scratches. The main wood cabinet imperfection is marking on the right side. I pictured all imperfections, but they are light and only visible from close view. Comes with a speaker plug pair. Every restored unit has a full burning day at medium volume. Will be double boxed for shipment. Local pickup is always welcome, ask for $50 packing/shipping labor discount!