2C51, (medium-mu twin triode).
6BN4A, (VHF triode amplifier).
6C33C, (high current regulation triode).
6CK4, (low-mu triode).
6J5, (medium-mu triode).
6J6, (medium-mu twin triode).
6N7, (Power twin triode).
6SL7GT, (high-mu twin triode).
6SN7GTB, (medium-mu twin triode).
12AX7/ECC83, (high-mu twin triode).
12AY7, (low level twin triode).
12AZ7A, (high-mu twin triode).
12BH7A, (medium-mu twin triode).
417A, (medium-mu triode).
5687, (medium-mu twin triode).
5703, (medium-mu sub-miniature triode).
5718/EC71, (medium-mu sub-miniature triode).
7025, (high-mu twin triode (special quality 12AX7/ECC83)).
CK6111, (medium-mu miniature double triode).
E182CC/7119, (medium-mu, high perveance twin triode).
E88CC/6922, (medium-mu twin triode).
EC86, (high-mu triode).
EC900, (high-mu triode).
EC8020, (high-mu triode).