Sharp-Cutoff Pentode
This tube has a rusty base. It tests NOS and probably is
The 6AC7 Vacuum Tube is a metal
type used in RF and IF stages or picture amplifier and
the first stages of the video amplifier of television
receivers. It is also used as a mixer or oscillator tube
in low-frequency applications. The 6AC7 Vacuum tube
requires an octal socket. When this tube is used as a
high-gain audio amplifier, the heater should be operated
from a battery source.
Electrical Data:
Heater Voltage ....................... 6.3 V
Heater Current ...................... 0.45 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode:
DC Component .............................. 90 V
Heater Negative with Respect to Cathode:
DC Component .............................. 90 V
Preferred Substitutes: ............... 6AJ7, 6134, 1852
Substitutes: ......................... 6AB7, 6SK7, 6SD7