Tube cross-reference
6F12 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6F12 voltage pentode - high frequency (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6F12
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
6AM6 Voltage Pentode - Sharp Cutoff (single)
- Base
- 7DB
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
EF91 Voltage Pentode - Sharp Cutoff (single)
- Base
- B7G
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Z77 Voltage Radio Detector Converter
- Base
- B7G
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Verify before substituting
Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.
View the complete 6F12 specifications →