One piece 12AY7 vacuum tube designed to serve as a replacement for EL84, 6N14Pn, 6BQ5 and 6072 models. The tube is configured for compatibility with sockets and equipment that support these common 9pin tubes, making it a practical option for maintenance and upgrades. Key benefits Broad compatibility: serves as a replacement option for multiple tube models, allowing a single part to be used in various devices. Easy replacement: comes in a compact, singletube package that fits standard 9pin sockets for straightforward servicing. Reliable standard part: manufactured to meet typical expectations for a 12AY7 family tube, enabling consistent operation in compatible circuits. Convenient stocking option: useful for service technicians and hobbyists who deal with multiple model families in equipment. Key attributes Functionality: vacuum tube (12AY7 type) for use as a replacement in compatible gear. Compatibility: designed to EL84, 6N14Pn, 6BQ5, and 6072 in suitable sockets and circuits. Size and base: standard 9pin noval base (B9A) compatible with common tube sockets. Material: glass vacuum envelope with internal electrodes (standard for this tube family). Performance: built to provide stable operation consistent with the 12AY7 family in appropriate applications. Use cases Replacing worn or failing tubes in audio equipment like preampliers or amplifiers that support 12AY7 or the listed substitute models. Servicing guitar amplifiers or hifi gear where a crosscompatible tube is acceptable within the circuit's design tolerances. Maintaining spares in a service or studio for quick swaps when a 9pin tube of this family is needed. Package note 1 piece per unit as described, suitable for stocking as a replacement part for compatible equipment.