Power Amplifier Pentode
This design handles a higher plate
voltage and the output is equal to Russian tubes.
The Groove Tube 6L6S Vacuum tube is a glass-octal type
used in the output stage of audio
amplifying equipment, especially units designed to
have ample reserve of power-delivering ability. Requires
an octal socket. This tube, like other power-handling
tubes, should be adequately ventilated.
I was told by a customer the following:
Red Base tubes are made by the Tesla Corporation.
Black Base tubes are made by the J.J. Corporation.
Heater for Unpotential Cathode:
AC or DC Voltage ............. 6.3 Volts
AC or DC Current ............. 0.9 Amps
Preferred Substitutions .......... 6L6S, 6L6B,
6L6WXT, 5881, 6L6, 6L6G, 6L6GB, 6L6GC,