Tube cross-reference
HF94 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the HF94 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for HF94
The following tubes are recorded as possible replacements for HF94. This direction does not establish that HF94 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 12AU6 as a possible replacement forHF94.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7BK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Where HF94 can be used as the replacement
In these recorded relationships, HF94 is the replacement tube. The listed original tubes are not automatically suitable as replacements for HF94.
Voltage Pentode - Sharp Cutoff (single)
The database records HF94 as a possible replacement for12AU6.
No special restrictions are recorded for this substitution.
| Specification | HF94 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7BK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Voltage Pentode - Remote Cutoff (single)
The database records HF94 as a possible replacement for12BA6.
No special restrictions are recorded for this substitution.
| Specification | HF94 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7CC |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 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 HF94 specifications →