ECC1806BZ7 SYL
ECC186 SQ
ECC189
ECC2000
ECC803S
ECC8112AT7 RCAHigh-mu twin triode
ECC816201High-mu twin triode
ECC81 POPEHigh-mu twin triode
ECC81 RCA12AT7High-mu twin triode
ECC8212AU7Medium-mu twin triode
ECC82 jj12AU7Medium-mu twin triode
ECC82 sovtek12AU7Medium-mu twin triode
ECC8312AX7High-mu twin triode
ECC846CW7Double Triode – Noval, 9 pin miniature (USA pico-9) B9A

ECC856AQ8
ECC886922Dual Audio and R.F. Triode (often used in television broadcast equipment, test gear, oscilloscopes and audiophile gear) similar to 6ES8
ECC88 PHDual Audio and R.F. Triode (often used in television broadcast equipment, test gear, oscilloscopes and audiophile gear) similar to 6ES8
ECC91