GE 6SN7GTB Matched Pair NOS Vacuum Tubes Grey Plate Side Getter Double Mica

This listing is for a factory-matched pair of New Old Stock (NOS) General Electric (GE) 6SN7GTB vacuum tubes. These tubes have been rigorously verified on a calibrated tester, with both units testing in the top 95% for performance. Unlike standard pulls, this set offers a verified, well-balanced output between sections and tubes, ensuring the symmetry required for critical audio applications.

The construction features the highly regarded grey plates with side O-getter and double mica spacers. This specific configuration is sought after for its mechanical stability and resistance to microphonics, housed in a short clear glass envelope with a black base. Technically, the 6SN7GTB is a robust dual triode with a controlled heater warm-up (6.3V @ 0.6A) and higher maximum plate voltage (450V DC) compared to earlier GT variants. With a maximum plate dissipation of 7.5W combined, these are durable, high-performance drivers.  

These tubes are an excellent choice for restoring vintage Hi-Fi audio preamplifiers and power amps, including classic designs from Dynaco, McIntosh, and other period-correct equipment. The combination of the double mica construction and strong electrical test results provides a tested strong vacuum tube solution for audiophiles seeking reliability and authentic vintage tone.

Both tubes are supplied in their original GE orange boxes, confirming their provenance and ensuring safe storage. This is a premium opportunity to acquire a pristine, factory-matched set ready for immediate installation in high-end audio or guitar amplifier circuits.