SB-200 AMPLIFIER ALL PARTS BREAKDOWN
1. High Voltage Power Supply (Main Filter & Metering) Location: Mounted on the original phenolic PCB or the replacement Harbach PM-200 board, located in the rear left corner of the chassis (viewed from front) near the power transformer. These capacitors are arranged in a series stack to handle ~2000V DC. Ref Des Physical Location Original Value Modern Equivalent Part Number Est. Cost (Each) Notes C1 – C6 HV Filter Bank (6 caps in series on PCB) 125 µF, 450V Electrolytic (Axial) Nichicon UHE2W121MHD (120µF, 450V, Radial w/adapter) or Cornell Dubilier 380LX121M450H022 (Axial). Upgrade: Nichicon UHE2W221MHD (220µF, 450V). $8.50 – $12.00 Critical: Must replace all 6. Total capacitance is ~21µF (stock) or ~36µF (220µF mods). Polarity is critical (+ to - in series chain). C7 HV Metering Filter (Across meter switch) 0.05 µF, 600V Paper/Plastic WIMA FKP2D024701F00KSSD (0.047 µF, 630V Film, Axial) $1.50 Standard value is 0.047 µF. Located near the meter switch...