Description

Tested Pair 6S N7GTB Sylvania Rebrand Audio Receiver Guitar Preamp Vacuum Tubes Country of origin: USA Production era: Estimate 1950s Model: 6SN7GTB Manufacturer: Sylvania for CBS and Admiral Type: preamp Plate type: black 3 stitch T type Filaments: standard Base type: octal 8 pin Spacers: two Getter frame: square foil Getter flash: full top Glass: clear Stencils: good Condition: excellent Usage (estimate): nominal Quantity: 2 Please review the photos for more detail Test results: Strong balanced test results for Gm: 2.40 / 2.30 and 2.20 / 2.15 For Gm, the suggested minimum is: 1.7 Shorts: None detected For testing, a calibrated Triplett 3444A tester was used Compatibility: Suitable for vintage tube-based equipment, ideal for use in audio amplifiers, power amps, and general tube equipment The tubes will be carefully packed to ensure safe shipping Estimated delivery time within the USA is 3 to 7 business days Standard shipping service is US Postal 1st class Shipping is combined when applicable Please feel free to contact us if you require any additional information