Description
Lettering on tube is worn and most is illegible. I can see JAN and part of SYLVANIA A8B date code is for 1948 No box Tube tests above NOS values on a calibrated Hickok 750: Triode 1: 2900 micromhos Triode2: 3000 micromhos NOS Value (on the Hickok 750): 2600 micromhos Balanced and strong! Thank you