Replacement 812A 812 Tube Pair for Amplifiers Description A direct replacement tube pair intended for amplifier maintenance and restoration. These tubes match the 812 and 812A tube types and are supplied as a matched pair to support balanced operation in applications that use these models. Key benefits Direct compatibility with 812 and 812A tube specifications, making replacement straightforward for equipment that requires these tubes. Supplied as a matched pair to help maintain balanced output in push pull and dual tube stages. Restores functionality to amplifiers and audio equipment that have degraded or failing tubes, reducing hum and imbalance caused by uneven tube performance. Simple dropin replacement that reduces downtime during repairs or maintenance. Important attributes Function: Replacement vacuum tube pair for amplifier circuits using 812 or 812A tubes. Compatibility: Designed to 812 and 812A tube models. Use in equipment that specifies these tube types. Package: Sold as a pair to support matched operation in circuits that depend on paired tubes. Construction: Typical vacuum tube construction suitable for amplifier use. Typical applications and use scenarios Vintage audio amplifier : worn tubes in a vintage hi fi amplifier to restore balanced channel output and reduce distortion caused by aged tubes. Guitar amplifier maintenance: Swap both tubes at the same time in a push pull guitar amplifier to maintain consistent tone and stage performance. Radio or transmitter servicing: Use as replacement parts when servicing older radio transmitters or test equipment that specify 812 or 812A tubes. What to check before Confirm your amplifier or equipment manual specifies 812 or 812A tubes to ensure compatibility. tubes in matched pairs when required by the circuit to preserve balance and consistent performance. This tube pair is intended for use as replacement components in amplifiers and compatible equipment that require 812 or 812A tubes.