M
User3302322
★★★★★
2026-11-06
Everything arrived as described and in great shape.
【Tested for Power】811A Vacuum Tubes - Set of 10 - Made in China - Transmitting Tube, Directly Heated Triode c_3
$171.60
$223.08000793457
30% OFF
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Product Details
Description
Specifications
Care Guide
This is a set of 10 811A vacuum tubes. Made in China.
■ Model Number: 811A (FU-811 compatible)
■ Quantity: 10 tubes
■ Manufacturing: China
■ Type: Directly heated triode / Transmitting tube
The 811A is a directly heated triode transmitting tube, characterized by its thorium-tungsten filament that glows brightly like a light bulb. In recent years, it has gained popularity as an output tube for DIY audio amplifiers, allowing you to enjoy a sound quality that combines transparency and power in single-ended amplifiers.
■ Condition
All 10 tubes have been power-tested. The filament lighting has been confirmed. Due to long-term storage, there may be slight oxidation on the pins. Please check the photos for the exterior condition.
■ Shipping
The items will be carefully packed with cushioning material and shipped.
*As these are used vacuum tubes, we do not accept returns or refunds. Please purchase with understanding.
#811A #FU811 #VacuumTube #TransmittingTube #DirectlyHeatedTriode #DIYAmplifier #TubeAmplifier #Audio #SingleEndedAmplifier
c_3
Category
Amplifier
Condition
No noticeable scratches or marks
Shipping
Included in price (by seller)
From
Saga
Daily Cleaning: Use a soft brush or damp cloth to gently wipe away dirt. Avoid harsh chemicals. For mesh areas, use diluted mild detergent and a soft brush.
Drying: Air dry in a cool, shaded place after cleaning. Avoid direct sunlight or high heat, which can cause fading and glue deterioration.
Storage: Stuff with paper to maintain shape when not in use. Store in a dry, ventilated area to prevent mold. Rotate between multiple pairs to extend lifespan.
Usage Notes: Designed for basketball. Not recommended for hiking, long-distance running, or other specialized sports where different performance features are required.