6-pin octal base (EIA 6CK / B6-112) — pins 4 and 6 are absent from the base. Fits a standard octal socket but only 6 pins are present on the tube.
In stages operating with grid-leak bias, an adequate cathode-bias resistor or other suitable means is required to protect the tube in the absence of excitation.
Grid-Number 1 Circuit Resistance maximum: 1 MΩ.
Peak cathode current 550 mA — this is a pulse rating for horizontal-deflection service where duty cycle must not exceed 15% of one scanning cycle.
Heater-cathode voltage: ±200 V max (DC + peak, both polarities).