Tube Equivalents

12au7 – October, 1946:

ECC82, ECC802, E82CC, E80CC*, B749, M8136, CV491, CV4003, 5814, 5963, 6087, 6189, 6350, 6680, 7316, 7730, 12bh7*, 6fq7**, 6gu7**, 6cg7**, 6dj8**, 6AQ8**

12at7 – May, 1947:

ECC81, ECC801, E81CC*, E180CC, A2900, CV455, CV4024, M8162, TS65, 5965, 6060, 6201, 6211, 6414, 6679, 6829, 7062, 7728, 6922**

12ax7 – September, 1947:

ECC83, ECC803, E83CC*, E803CC, B339, B759, CV492, CV4004, CV8156, CV8222, E2164, M8137, 6L13, 12ad7*, 2df7, 5751, 6681, 7025, 7729, 12BZ7*, 6n2p**, 6eu7**, 7308**

6sn7 – March, 1941:

ECC32, ECC33, CV1988, 6H8C, 5692, 6042, 6180, 6f8g***, 7n7***, CV898***, 12au7*** (family)

Bold indicates special quality tubes
* Higher heater current
** Requires circuit modification
*** Requires adapter

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