6CZ5
The 6CZ5 is a power pentode tube with a B9A (Noval) miniature 9-pin base It is used in the high voltage power supply oscillator of the:
- 502 (not 502A)
- 555
- 561, 561A, and 561S (not the 561B)
- 564 (not the 564B)
- 567
- Sylvania 6CZ5 Datasheet (PDF)
- 6CZ5 @ radiomuseum.org