Tube cross-reference

6AC7 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6AC7 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.

Exact variations of 6AC7

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.

1852
Voltage Pentode - Sharp Cutoff (single)
Base
Not recorded
Socket
IO
Base pins
8
Sections
1
Heater voltage
6.3 V
Heater current
0.45 A

Replacement tubes for 6AC7

The following tubes are recorded as possible replacements for 6AC7. This direction does not establish that 6AC7 can replace them.

6F10

Voltage Pentode - Sharp Cutoff (single)

Foreign To American

The database records 6F10 as a possible replacement for6AC7.

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	8N	K8/18
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

1852

Voltage Pentode - Sharp Cutoff (single)

Receiving To Industrial Tubes

The database records 1852 as a possible replacement for6AC7.

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	8N	Not recorded
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6134

Voltage Pentode - Sharp Cutoff (single)

Receiving To Industrial Tubes

The database records 6134 as a possible replacement for6AC7.

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	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6AC7W

Voltage Pentode - Sharp Cutoff (single)

Receiving To Industrial Tubes

The database records 6AC7W as a possible replacement for6AC7.

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	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6AB7

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6AB7 as a possible replacement for6AC7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6AJ7

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AJ7 as a possible replacement for6AC7.

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	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6SG7

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6AC7.

Parallel heater circuits only
Not suitable for all circuits

Specification	Original tube	Replacement
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	RTMA 8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SG7GT

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6SG7GT as a possible replacement for6AC7.

Parallel heater circuits only
Not suitable for all circuits

Specification	Original tube	Replacement
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SH7

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6SH7 as a possible replacement for6AC7.

Parallel heater circuits only
Not suitable for all circuits

Specification	Original tube	Replacement
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	RMA 8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SH7GT

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6SH7GT as a possible replacement for6AC7.

Parallel heater circuits only
Not suitable for all circuits

Specification	Original tube	Replacement
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

Where 6AC7 can be used as the replacement

In these recorded relationships, 6AC7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AC7.

6F10

Voltage Pentode - Sharp Cutoff (single)

American To Foreign

The database records 6AC7 as a possible replacement for6F10.

No special restrictions are recorded for this substitution.

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	K8/18
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

1852

Voltage Pentode - Sharp Cutoff (single)

Communications And Special Purpose Tubes

The database records 6AC7 as a possible replacement for1852.

No special restrictions are recorded for this substitution.

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	Not recorded
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6AB7

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6AB7.

No special restrictions are recorded for this substitution.

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6AJ7

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6AJ7.

No special restrictions are recorded for this substitution.

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.45 A

6SG7

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SG7.

Parallel heater circuits only
Not suitable for all circuits

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	RTMA 8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SG7GT

Voltage Pentode - Remote Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SG7GT.

Parallel heater circuits only
Not suitable for all circuits

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Remote Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SH7

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SH7.

Parallel heater circuits only
Not suitable for all circuits

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	RMA 8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SH7GT

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SH7GT.

Parallel heater circuits only
Not suitable for all circuits

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 A	0.3 A

6SH7L

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SH7L.

Parallel heater circuits only
Not suitable for all circuits

Specification	6AC7 replacement	Original tube
Tube type	Voltage Pentode - Sharp Cutoff (single)	Voltage Pentode - Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	8N	Not recorded
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.45 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 6AC7 specifications →