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Tube Substitutions for:
6SL7
High Mu Duo Triode
TypeSubstitutesBase Diagram
6SL76SL7W, 6SL7WGT, 5691*, 6113
Notes:* - Parallel filaments
Web References6SL7 (RFT) @ Franks Electron Tubes
6SL7 @ RadioMuseum.org
Sylvania Type 6SL7
HIGH-MU DUO TRIODE



MECHANICAL DATA

Bulb MT-8
Base Metal Shell Wafer Octal
Basing 8BD
Mounting Position Any


ELECTRICAL DATA


HEATER CHARACTERISTICS
Heater Voltage 6.3 Volts
Heater Current 300 Ma
Maximum Heater-Cathode Voltage 90 Volts

DIRECT INTERELECTRODE CAPACITANCES
  Section 12 Section 2
Grid to Plate 2.8 2.8
Grid to Cathode 3.0 3.4
Plate to Cathode 3.8 3.2
Plate to Plate 0.4  
Grid to Grid 0.65  
Grid Section 2 to Plate Section 1 0.13  

MAXIMUM RATINGS (Design Center Values-Each Section)
Plate Voltage 300 Volts
Plate Dissipation 1.0 Watt
Positive Grid Voltage 0 Volts

CHARACTERISTIC AND TYPICAL OPERATION
Class A Amplifer (Each Section)
Plate Voltage 250 Volts
Grid Voltage -2 Volts
Cathode Bias Resistor 870 Ohms
Plate Current 2.3 Ma
Transconductance 1600 �mhos
Amplification Factor 70 X
Plate REsistance 44000 Ohms

NOTES:

1 Shield No. 308 connected to cathode.
2 Section No. 1 connects to pins 4, 5 and 6, Section No. 2 connects to pins 1, 2 and 3.

APPLICATION

The Sylvania Type 6SL7 is a high-mu duo triode designed for service as resistance coupled amplifier or phase inverter.



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