General Electric 12SN7GTA Preamp Tube Set Grey Plates Same Codes USA 1963 Tested

12SN7GTA / 12SN7 General Electric vacuum tubes. Ideal for hi-fi audio, studio gear, and vintage restoration where reliable, tested vintage glass is preferred over new production.

Key Applications

• Common in: Vintage hi-fi amplifiers, radios, and equipment requiring a 12-volt heater equivalent to the 6SN7.
• Also known as: 12SN7, 12SN7GT.
• Suitable for: Preamp, phase inverter, and driver positions.

Testing & Performance

• Equipment used: Calibrated mutual conductance tube tester.
• Test results: All five tubes test strong at expected NOS levels.
• Verified free of shorts, opens, and gas/leaks.
• Offered as a tested set of 5 tubes, verified for general use and reliable operation.

Physical Condition & Construction

• Condition: NOS, stored in a clean, dry environment.
• Construction: Grey plates with bottom D-getters.
• Markings: Original GE factory logos and standard commercial markings.
• Origin: Manufactured in the USA, 1963.

Scarcity & Use-Case Note Authentic vintage GE 12SN7GTA tubes from this era are no longer in production and represent a non-renewable resource for hi-fi enthusiasts, studios, and restoration work. This set has been cleaned, documented, and tested to verify its operating health, making it a strong candidate for critical audio paths and vintage amplifier preservation.

Shipping & Guarantee

• Shipping: Packed carefully to survive real-world transit. Shipped primarily via USPS, with tracking and adequate padding to ensure safe delivery of fragile vintage glass.