Tube cross-reference
6AS6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6AS6 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6AS6
The following tubes are recorded as possible replacements for 6AS6. This direction does not establish that 6AS6 can replace them.
Voltage Pentode or Tetrode (with diode)
The database records 6F33 as a possible replacement for6AS6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode or Tetrode (with diode) |
| Construction | Pentode | Diode-Pentode |
| Base | E7-1 | B7G |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.35 A |
Voltage Pentode
The database records M8196 as a possible replacement for6AS6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | E7-1 | Not recorded |
| Socket | B7G | Not recorded |
| Base pins | 7 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Pentode
The database records 409A as a possible replacement for6AS6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | E7-1 | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Radio Detector Converter
The database records 5725 as a possible replacement for6AS6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Radio Detector Converter |
| Construction | Pentode | Pentode |
| Base | E7-1 | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 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 6187 as a possible replacement for6AS6.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | E7-1 | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 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 6AS6W as a possible replacement for6AS6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | E7-1 | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Radio Detector Converter
The database records 6DB6 as a possible replacement for6AS6.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Radio Detector Converter |
| Construction | Pentode | Pentode |
| Base | E7-1 | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.3 A |
Where 6AS6 can be used as the replacement
In these recorded relationships, 6AS6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AS6.
Voltage Pentode or Tetrode (with diode)
The database records 6AS6 as a possible replacement for6F33.
No special restrictions are recorded for this substitution.
| Specification | 6AS6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode or Tetrode (with diode) |
| Construction | Pentode | Diode-Pentode |
| Base | E7-1 | B7G |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.35 A |
Voltage Pentode
The database records 6AS6 as a possible replacement for409A.
No special restrictions are recorded for this substitution.
| Specification | 6AS6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | E7-1 | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 A | 0.175 A |
Voltage Radio Detector Converter
The database records 6AS6 as a possible replacement for6DB6.
- Parallel heater circuits only
| Specification | 6AS6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Radio Detector Converter |
| Construction | Pentode | Pentode |
| Base | E7-1 | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.175 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 6AS6 specifications →