Tube cross-reference
2FQ5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 2FQ5 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 2FQ5
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.
2GK5 Voltage - Triode (single high frequency)
- Base
- 7FP
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 2.3 V
- Heater current
- 0.6 A
Replacement tubes for 2FQ5
The following tubes are recorded as possible replacements for 2FQ5. This direction does not establish that 2FQ5 can replace them.
Voltage - Triode (single high frequency)
The database records 2ES5 as a possible replacement for2FQ5.
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 | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FQ5A as a possible replacement for2FQ5.
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 | Not recorded | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FY5 as a possible replacement for2FQ5.
- Parallel heater circuits only
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2GK5 as a possible replacement for2FQ5.
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 | Not recorded | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.3 V |
| Heater current | 0.6 A | 0.6 A |
Where 2FQ5 can be used as the replacement
In these recorded relationships, 2FQ5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 2FQ5.
Voltage - Triode (single high frequency)
The database records 2FQ5 as a possible replacement for2ER5.
No special restrictions are recorded for this substitution.
| Specification | 2FQ5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FQ5 as a possible replacement for2FH5.
No special restrictions are recorded for this substitution.
| Specification | 2FQ5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FQ5 as a possible replacement for2FQ5A.
No special restrictions are recorded for this substitution.
| Specification | 2FQ5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FQ5 as a possible replacement for2FY5.
No special restrictions are recorded for this substitution.
| Specification | 2FQ5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.35 V |
| Heater current | 0.6 A | 0.6 A |
Voltage - Triode (single high frequency)
The database records 2FQ5 as a possible replacement for2GK5.
No special restrictions are recorded for this substitution.
| Specification | 2FQ5 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | Not recorded | 7FP |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.3 V | 2.3 V |
| Heater current | 0.6 A | 0.6 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 2FQ5 specifications →