Tube cross-reference
6979 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6979 power - beam (not sweep). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6979
The following tubes are recorded as possible replacements for 6979. This direction does not establish that 6979 can replace them.
Power - Tetrode (NOT beam) (over 1000V 100W)
The database records 4X250B as a possible replacement for6979.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Tetrode (NOT beam) (over 1000V 100W) |
| Construction | BeamPower | Tetrode |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | B8G |
| Base pins | Not recorded | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6 V | 6 V |
| Heater current | 2.6 A | 2.1 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 6979 specifications →