Tube cross-reference
50BM8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 50BM8 power - pentode (not beam). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 50BM8
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.
UCL82 Power - Pentode (NOT beam)
- Base
- 9EX
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 50 V
- Heater current
- 0.1 A
Replacement tubes for 50BM8
The following tubes are recorded as possible replacements for 50BM8. This direction does not establish that 50BM8 can replace them.
Power - Pentode (NOT beam)
The database records 10PL12 as a possible replacement for50BM8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | E9-1 | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 50 V | 50 V |
| Heater current | 0.1 A | 0.1 A |
Power - Pentode (NOT beam)
The database records UCL82 as a possible replacement for50BM8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | E9-1 | 9EX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 50 V | 50 V |
| Heater current | 0.1 A | 0.1 A |
Where 50BM8 can be used as the replacement
In these recorded relationships, 50BM8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 50BM8.
Power - Pentode (NOT beam)
The database records 50BM8 as a possible replacement for10PL12.
No special restrictions are recorded for this substitution.
| Specification | 50BM8 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | E9-1 | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 50 V | 50 V |
| Heater current | 0.1 A | 0.1 A |
Power - Pentode (NOT beam)
The database records 50BM8 as a possible replacement forUCL82.
No special restrictions are recorded for this substitution.
| Specification | 50BM8 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode (NOT beam) | Power - Pentode (NOT beam) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | E9-1 | 9EX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 50 V | 50 V |
| Heater current | 0.1 A | 0.1 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 50BM8 specifications →