Tube cross-reference
M8100 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the M8100 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for M8100
The following tubes are recorded as possible replacements for M8100. This direction does not establish that M8100 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 5654 as a possible replacement forM8100.
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 | E7-1 |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Where M8100 can be used as the replacement
In these recorded relationships, M8100 is the replacement tube. The listed original tubes are not automatically suitable as replacements for M8100.
Voltage - Dual Triode (similar)
The database records M8100 as a possible replacement for5608.
No special restrictions are recorded for this substitution.
| Specification | M8100 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage - Dual Triode (similar) |
| Construction | Pentode | Triode-Triode |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | B9A |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 2 |
| Heater voltage | 6.3 V | 2.5 V |
| Heater current | 0.175 A | 2 A |
Voltage Pentode - Sharp Cutoff (single)
The database records M8100 as a possible replacement for5654.
No special restrictions are recorded for this substitution.
| Specification | M8100 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | E7-1 |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Pentode - Sharp Cutoff (single)
The database records M8100 as a possible replacement for6096.
No special restrictions are recorded for this substitution.
| Specification | M8100 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Pentode - Sharp Cutoff (single)
The database records M8100 as a possible replacement for6AK5.
- Not suitable for all circuits
| Specification | M8100 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7BD |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 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 M8100 specifications →