Please review the photos for more detail. NOS test results for Gm. 1.50 / 1.55 and 1.5 / 1.9. For Gm, 1.0 is the 60% reject point.
For reference we used a Triplett 3444A Tester. The item "6SL7GT GE Audio Receiver Guitar Pre-Amplifier Vacuum Tubes Tested Pair" is in sale since Wednesday, April 7, 2021.This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets". The seller is "chukv" and is located in Westwood, Massachusetts. This item can be shipped worldwide.