12AX7 / ECC83 Telefunken Smooth or Ribbed Plate w/Diamond (W. Germany)

This is a miniature type tube used as a phase inverter or a twin resistance-coupled amplifier in radio equipment.  Especially designed for computers.

These tubes were acquired from a special source.  The date codes are early 1960’s.

This is a miniature type tube used as a phase inverter or a twin resistance-coupled amplifier in radio equipment.  Especially designed for computers.  Each triode unit is independent of the other except for the common heater.

These tubes were acquired from a special source.  The date codes are early 1960’s.