Tube cross-reference

12AT7 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 12AT7 voltage - dual triode (similar). Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 12AT7

The following tubes are recorded as possible replacements for 12AT7. This direction does not establish that 12AT7 can replace them.

B309

Voltage - Dual Triode (similar high frequency)

Foreign To American

The database records B309 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar high frequency)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	Not recorded
Base pins	9	Not recorded
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

B739

Voltage - Dual Triode (similar)

Foreign To American

The database records B739 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	6.3 V
Heater current	0.15 A	0.37 A

E81CC

Voltage - Dual Triode (similar)

Foreign To American

The database records E81CC as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	6.3 V
Heater current	0.15 A	0.3 A

ECC801S

Voltage - Dual Triode (similar)

Foreign To American

The database records ECC801S as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

ECC81

Voltage - Dual Triode (similar high frequency)

Foreign To American

The database records ECC81 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar high frequency)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

12AT7WA

Voltage - Dual Triode (similar)

Receiving To Industrial Tubes

The database records 12AT7WA as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

6060

Voltage - Dual Triode (similar)

Receiving To Industrial Tubes

The database records 6060 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

6201

Voltage - Dual Triode (similar high frequency)

Receiving To Industrial Tubes

The database records 6201 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar high frequency)
Construction	Triode-Triode	Triode-Triode
Base	9A	E9-1
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

6679

Voltage - Dual Triode (similar)

Receiving To Industrial Tubes

The database records 6679 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

7492

Voltage - Dual Triode (similar)

Receiving To Industrial Tubes

The database records 7492 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

7728

Voltage - Dual Triode (similar)

Receiving To Industrial Tubes

The database records 7728 as a possible replacement for12AT7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	E9-1 / 9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	6.3 V
Heater current	0.15 A	0.3 A

12AZ7

Voltage - Dual Triode (similar)

Receiving Tubes

The database records 12AZ7 as a possible replacement for12AT7.

Parallel heater circuits only

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.225 A

12AZ7A

Voltage - Dual Triode (similar)

Receiving Tubes

The database records 12AZ7A as a possible replacement for12AT7.

Parallel heater circuits only

Specification	Original tube	Replacement
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.225 A

Where 12AT7 can be used as the replacement

In these recorded relationships, 12AT7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12AT7.

B309

Voltage - Dual Triode (similar high frequency)

American To Foreign

The database records 12AT7 as a possible replacement forB309.

No special restrictions are recorded for this substitution.

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar high frequency)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	Not recorded
Base pins	9	Not recorded
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

B739

Voltage - Dual Triode (similar)

American To Foreign

The database records 12AT7 as a possible replacement forB739.

No special restrictions are recorded for this substitution.

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	6.3 V
Heater current	0.15 A	0.37 A

E81CC

Voltage - Dual Triode (similar)

American To Foreign

The database records 12AT7 as a possible replacement forE81CC.

No special restrictions are recorded for this substitution.

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	6.3 V
Heater current	0.15 A	0.3 A

ECC81

Voltage - Dual Triode (similar high frequency)

American To Foreign

The database records 12AT7 as a possible replacement forECC81.

No special restrictions are recorded for this substitution.

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar high frequency)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

6679

Voltage - Dual Triode (similar)

Communications And Special Purpose Tubes

The database records 12AT7 as a possible replacement for6679.

No special restrictions are recorded for this substitution.

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	Not recorded
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.15 A

12AZ7

Voltage - Dual Triode (similar)

Receiving Tubes

The database records 12AT7 as a possible replacement for12AZ7.

Parallel heater circuits only

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.225 A

12AZ7A

Voltage - Dual Triode (similar)

Receiving Tubes

The database records 12AT7 as a possible replacement for12AZ7A.

Parallel heater circuits only

Specification	12AT7 replacement	Original tube
Tube type	Voltage - Dual Triode (similar)	Voltage - Dual Triode (similar)
Construction	Triode-Triode	Triode-Triode
Base	9A	9A
Socket	B9A	B9A
Base pins	9	9
Sections	2	2
Heater voltage	12.6 V	12.6 V
Heater current	0.15 A	0.225 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 12AT7 specifications →