TWIN TETRODE
The Motorola 97-136A02 Vacuum tube is a twin tetrode,
heavy duty version of the 6894 / QQE06/40. It was used by
Motorola in its UHF Motrac series LHT and MHT. The plates
have extra cooling-fins in the middle, where the thick
plate connecting and supporting rods are welded.
The 97-136A02 is a ruggedized version of the QQE 06/40
Electrical Data:
Heater Voltage ............................. 13.5 V
Heater Current .............................. 1.0 A
Substitutes ..................... 8643