Tube cross-reference

6SG7 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6SG7 voltage - pentode remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 6SG7

The following tubes are recorded as possible replacements for 6SG7. This direction does not establish that 6SG7 can replace them.

6006

Voltage - Pentode Remote Cutoff (single)

Receiving To Industrial Tubes

The database records 6006 as a possible replacement for6SG7.

No special restrictions are recorded for this substitution.

Specification	Original tube	Replacement
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Remote Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8BK
Socket	IO	Not recorded
Base pins	8	Not recorded
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6AB7

Voltage - Pentode Remote Cutoff (single)

Receiving Tubes

The database records 6AB7 as a possible replacement for6SG7.

Parallel heater circuits only
Not suitable for all circuits

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

6AC7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6AC7 as a possible replacement for6SG7.

Parallel heater circuits only
Not suitable for all circuits

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

6AJ7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6AJ7 as a possible replacement for6SG7.

Parallel heater circuits only
Not suitable for all circuits

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

6SH7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SH7 as a possible replacement for6SG7.

No special restrictions are recorded for this substitution.

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

6SH7GT

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SH7GT as a possible replacement for6SG7.

No special restrictions are recorded for this substitution.

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

Where 6SG7 can be used as the replacement

In these recorded relationships, 6SG7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6SG7.

6AB7

Voltage - Pentode Remote Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6AB7.

Parallel heater circuits only
Not suitable for all circuits

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Remote Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.45 A

6AC7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6AC7.

Parallel heater circuits only
Not suitable for all circuits

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.45 A

6AJ7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6AJ7.

Parallel heater circuits only
Not suitable for all circuits

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.45 A

6SG7GT

Voltage - Pentode Remote Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SG7GT.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Remote Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6SH7

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SH7.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	RMA 8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6SH7GT

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SH7GT.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8BK
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6SH7L

Voltage - Pentode Sharp Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SH7L.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Sharp Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	Not recorded
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6SK7

Voltage - Pentode Remote Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SK7.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Remote Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	RTMA 8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 V
Heater current	0.3 A	0.3 A

6SK7GT

Voltage - Pentode Remote Cutoff (single)

Receiving Tubes

The database records 6SG7 as a possible replacement for6SK7GT.

No special restrictions are recorded for this substitution.

Specification	6SG7 replacement	Original tube
Tube type	Voltage - Pentode Remote Cutoff (single)	Voltage - Pentode Remote Cutoff (single)
Construction	Pentode	Pentode
Base	RTMA 8BK	8N
Socket	IO	IO
Base pins	8	8
Sections	1	1
Heater voltage	6.3 V	6.3 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 6SG7 specifications →