Pair (2) National Electronics 6SN7GTB Preamp Tubes
Matched Pair
Perfectly Balanced
Made in Russia
Tested on Hickok 750
No leaks/shorts
Gm test results for BOTH tubes (in micromhos)
2800/2800
NOS value is 2600 on the 750, so these are well above NOS
Have more if interested
Thanks for looking