| tube | base | § 1 | § 2 | § 3 |
|---|---|---|---|---|
| 6SN7 | IO | ½6SN7 | ½6SN7 | |
| 12AT7 | B9A | ½12AT7 | ½12AT7 | |
| 12AU7 | B9A | ½12AU7 | ½12AU7 | |
| 12AT6 | B7G | ½5751 | ||
| 12AV6 | B7G | ½12AX7 | ||
| 12AX7 | B9A | ½12AX7 | ½12AX7 | |
| 12DW7 | B9A | ½12AX7 | ½12AU7 | |
| 12HE7 | E12 | 6HB5 | 6BE3 | |
| 6C10 | E12 | ½12AX7 | ½12AX7 | ½12AX7 |
| 6D10 | E12 | ½12AT7 | ½12AT7 | ½12AT7 |
| 6J11 | E12 | 6EW6 | 6EW6 | |
| 6K11 | E12 | ½12AU7 | ½12AX7 | ½12AX7 |
| 6M11 | E12 | 6EW6 | 58 mu triode | 58 mu triode |
| 6T9 | E12 | 6AQ5 | ½12AX7 | |
| 6T10 | E12 | 6DT5 | 6DT6 | |
| 6U10 | E12 | ½12AU7 | ½12AX7 | ½12AU7 |
| 6Y10 | E12 | 8400 gm pentode | 6HZ6 | |
| 6AC10 | E12 | ½12AT7 | ½12AT7 | ½12AT7 |
| 6AD10 | E12 | 6DT5 | 6GX6 | |
| 6AF10 | E12 | 10000 gm pentode | ½6KV8 | |
| 6AF11 | E12 | ½6GN8 | 68 mu triode | 41 mu triode |
| 6AG9 | E12 | 6HZ6 | ½6AU8 (triode section) | |
| 6AH9 | E12 | ½6JT8 | ½12AU7 | |
| 6AK9 | E12 | 6200 gm pentode | ½6AU8 (triode section) | ½12AU7 |
| 6AK10 | E12 | 53 mu triode | 53 mu triode | 53 mu triode |
| 6AL9 | E12 | 6HZ6 | 59 mu triode | |
| 6AL11 | E12 | 6DT5 | 6DT6 | |
| 6AR11 | E12 | 10500 gm remote cutoff pentode | 10500 gm remote cutoff pentode | |
| 6AS11 | E12 | ½6GN8 | 68 mu triode | ½6AU8 (triode section) |
| 6AV11 | E12 | ½12AU7 | ½12AU7 | ½12AU7 |
| 6BD11 | E12 | ½6GN8 | 68 mu triode | ½6AU8 (triode section) |
| 6BF11 | E12 | 8600 gm pentode | 6DT6 | |
| 6BH11 | E12 | 7500 gm sharp cutoff pentode | ||
| 6BK11 | E12 | ½5751 | ½12AX7 | ½12AX7 |
| 6BN11 | E12 | 6EW6 | 6EW6 | |
| 6BV11 | E12 | 6HZ6 | 6HZ6 | |
| 6BW11 | E12 | ½6AU8 (pentode section) | 6EW6 | |
| 6BY11 | E12 | 6EZ5 | 6GX6 | |
| 6CA11 | E12 | 21200 gm sharp cutoff pentode | 63 mu triode | 69 mu triode |
| 6JZ8 | E12 | ½6FQ7 | 6CU5 | |
| 6LU8 | E12 | 6AV5 | ½12AT7 | |
| 6MJ8 | E12 | ½12BH7 | ½12BH7 | ½12BH7 |
| 6MF8 | E12 | 6EZ5 | ½12AT7 | |
| 6MN8 | E12 | 53 mu triode | 53 mu triode | 53 mu triode |
| 6MY8 | E12 | 9300 gm pentode | ½12AT7 | |
| 7688 | E12 | ½12AU7 | ½12AU7 | ½12AU7 |
| 7689 | E12 | ½12AX7 | ½12AX7 | ½12AX7 |
| 7690 | E12 | ½12AT7 | ½12AT7 | ½12AT7 |
| code | name | type | notes |
|---|---|---|---|
| B7G | heptal, pico | 7-pin miniature | |
| B8A | rimlock | 8-pin rimlock | |
| B8G | loctal | 8-pin loctal | USA |
| B9A | noval | 9-pin miniature | |
| B9A | neo-noval | 9-pin miniature | same as noval, but T-9 glass |
| B9D | magnoval | 9-pin compactron | 1.27mm pins |
| B9G | loctal | 9-pin loctal | UK |
| B10B | decal | 10-pin miniature | like noval, but 10 pins |
| E9 | novar | 9-pin compactron | 1mm pins |
| E10 | noval 10-pin | 10-pin miniature | noval w/added center pin |
| E12 | duodecar | 12-pin compactron | |
| IO | international octal | octal | |
| W8A | loctal | 8-pin loctal | Europe |