Medium-Mu Triode - Pentode
The 6U9 / ECF201 Vacuum tube is a miniature type used in
IF amplifier and sound and sync
applications in TV receivers. It has a miniature base
except it has 10 pins. They require a miniature 10-pin
socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ............................... 0.41 A
Substitutes ................................... 6X9