Tube cross-reference
4HM5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 4HM5 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 4HM5
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.
4HA5 Voltage - Triode (single high frequency)
- Base
- 7GM
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 3.8 V
- Heater current
- 0.3 A
Replacement tubes for 4HM5
The following tubes are recorded as possible replacements for 4HM5. This direction does not establish that 4HM5 can replace them.
Voltage - Triode (single high frequency)
The database records 4HA5 as a possible replacement for4HM5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7GM | 7GM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 3.8 V |
| Heater current | 0.3 A | 0.3 A |
Voltage - Triode (single high frequency)
The database records 4HQ5 as a possible replacement for4HM5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7GM | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 4.2 V |
| Heater current | 0.3 A | 0.3 A |
Where 4HM5 can be used as the replacement
In these recorded relationships, 4HM5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 4HM5.
Voltage - Triode (single high frequency)
The database records 4HM5 as a possible replacement for4HA5.
No special restrictions are recorded for this substitution.
| Specification | 4HM5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7GM | 7GM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 3.8 V |
| Heater current | 0.3 A | 0.3 A |
Voltage - Triode (single high frequency)
The database records 4HM5 as a possible replacement for4HQ5.
No special restrictions are recorded for this substitution.
| Specification | 4HM5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7GM | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 4.2 V |
| Heater current | 0.3 A | 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 4HM5 specifications →