Description

Tested Pair of 12SK7GT JAN CNU National Union Audio Receiver Guitar Preamplifier Vacuum Tubes Country of origin: USA Production era: 1950s Model: JAN CNU 12SK7GT Manufacturer: National Union Type: Preamp Plate type: round silver vented Base type: octal 8 pin with metal base collar Getter frame: rectangle wire Getter flash: top Filaments: standard Glass: Clear Stencils: very good minimal wear / tarnish Condition: same construction Cartons: NA Usage: minimal Quantity: 2 Please review the photos for more detail Test results: Strong balanced test results for Gm: 2.1 and 2.15 For Gm, the suggested minimum value is: 1.2 Shorts: None detected For testing, a calibrated Triplett 3444A tester was used Compatibility: Suitable for vintage tube-based equipment, ideal for use in amplifiers, preamps, and general audio 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