Description:Matched Pair of High-Voltage High-Precision Soviet K75-10 1uF 500V 5% PIO (Paper-in-Oil) CapacitorsUp for sale is a rare, closely matched vintage pair of premium high-voltage Soviet hybrid Paper-in-Oil (PIO) and Polyethylene Film capacitors K75-10. Both units come from the exact same production batch, manufactured in July 1988 (Date code: 8807) and carry the official Soviet state quality control mark "OTK".Key Premium Feature:
Unlike standard vintage components with a 10% or 20% tolerance, these capacitors feature a rare, factory-certified high-precision tolerance of +-5%. This makes them an absolute dream for high-end audio builders who require perfectly balanced channels in stereo equipment.Rated at 500V AC, these large green metal-body capacitors are heavily sought after for heavy-duty tube amplifier restorations, anode power supply filtering, and premium speaker crossover networks. Hermetically sealed and equipped with original heavy-duty solder lugs, they provide the legendary smooth, transparent, and ultra-linear analog tone that vintage Soviet PIO dielectrics are famous for worldwide.Key Features and Specifications:

• Model: K75-10 (High Precision Block)
• Capacitance: 1.0 uF (Microfarad)
• Tolerance: +-5% (Rare high-precision rating for critical audio paths)
• Voltage Rating: 500 V AC / 50 Hz (Perfect for high-voltage tube gear)
• Dielectric: Hybrid (Paper-in-Oil combined with Polyethylene film)
• Case Material: Hermetically sealed metal body with green protective sleeve
• Date Code: 8807 (July 1988)
• Quality Grade: OTK stamped (State Quality Control)

Condition:

• Status: New Old Stock (NOS).
• Cosmetic condition: Excellent vintage condition with clean factory solder lugs, exactly as shown in the photos.
• Testing: Visually inspected and guaranteed authentic.

Perfect For:

• High-voltage tube amplifier power supply filters and coupling
• Premium speaker crossover networks (Crossovers)
• High-end DIY audio upgrades where tight component matching is critical
• Vintage studio equipment maintenance and boutique builds

You will receive the exact matched pair of 2 high-precision 500V capacitors shown in the photos.Shipping and Packaging:
Worldwide shipping with a tracking number provided. Due to the solid weight and size of these components, they will be securely packed in thick bubble wrap and a sturdy box to ensure safe transit.If you have any questions, feel free to ask before buying!