Triode - Heptode
These are New Telefunken reissue tubes.
The Telefunken ECH81 Vacuum tube is a miniature type used
as a combined oscillator and mixer in AM/FM and TV
receivers. It requires a miniature 9-contact socket.
Electrical Data:
Heater Voltage ................................ 6.3 V
Heater Current ................................ 0.3 A
Maximum Heater-Cathode Voltage
Heater Positive with Respect to Cathode:
DC Component .............................. 100 V
Heater Negative with Respect to Cathode:
DC Component .............................. 100 V
Preferred Substitutes ........................6AJ8