Description:Matched Pair of High Voltage Soviet K75-10 1uF 1000V 10% PIO (Paper-in-Oil) CapacitorsUp for sale is a rare, closely matched vintage pair of premium monster-sized 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 November 1988 (Date code: 8811) and carry the official Soviet state quality control mark "OTK".Rated at a massive 1000V (1kV), these heavy-duty capacitors are highly prized and strictly required by audiophiles and custom tube amplifier builders working on high-voltage single-ended (SET) designs (such as 300B, 211, 845, or GM70 tube projects).The 1.0uF capacitance value combined with a 1000V rating makes them ideal for critical anode power supply filtering, high-voltage bypass networks, and ultimate DIY audio upgrades. Hermetically sealed in huge, robust green metal bodies with original heavy-duty factory solder lugs, they deliver the legendary smooth, deep, and beautifully layered analog sound signature that vintage Soviet PIO dielectrics are famous for worldwide.Key Features and Specifications:

• Model: K75-10 (High Voltage Monster Block)
• Capacitance: 1.0 uF (Microfarad)
• Tolerance: +-10% (Standard audio grade precision)
• Voltage Rating: 1000 V (1 kV) AC / 50 Hz (Extreme safety margin for High-End tube gear)
• Dielectric: Hybrid (Paper-in-Oil combined with Polyethylene film)
• Case Material: Hermetically sealed metal body with green protective sleeve
• Date Code: 8811 (November 1988)
• Quality Grade: OTK stamped (State Quality Control)

Condition:

• Status: New Old Stock (NOS).
• Cosmetic condition: Pristine 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 (300B, 845, 211, GM70)
• Premium loudspeaker crossover networks (Crossovers)
• High-end DIY audiophile upgrades where supreme voltage handling is required
• Vintage studio equipment maintenance and boutique amplifier creations

You will receive the exact matched pair of 2 high-voltage 1kV capacitors shown in the photos.Shipping and Packaging:
Worldwide shipping with a tracking number provided. Due to the significant weight and large size of these components, they will be securely packed in thick bubble wrap and a sturdy cardboard box to ensure safe transit.If you have any questions, feel free to ask before buying!