Tube cross-reference
CV4040 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the CV4040 new (being researched). Compare core specifications and verify every restriction before using a replacement.
Exact variations of CV4040
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.
S6F17 Power - Beam Single (NOT sweep) (under 10W)
- Base
- Not recorded
- Socket
- Not recorded
- Base pins
- Not recorded
- 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 CV4040 specifications →