Amperex ECC8312AX7A. Also Amplitrex Tested at-. The minimum for a good ECC83 on TV/7 is 32. NOS ECC83 usually test 48-50. This tube tests at. Tube #1 – Tests at 49/49 (Approx 100% / 100%). Years ago, I put away a bunch of great Tubes.
Amperex ECC8312AX7A. Also Amplitrex Tested at-. The minimum for a good ECC83 on TV/7 is 32. NOS ECC83 usually test 48-50. This tube tests at. Tube #1 – Tests at 49/49 (Approx 100% / 100%). Years ago, I put away a bunch of great Tubes.