EAT ecc 88 cool valve vacuum tube

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The EAT ECC 88 is a special quality double triode. The tube satisfies the specifications in accordance with MIL-E-1/1J168 (NAVY) from 18.6.1958.

Anode voltage Vao Max. 550 V

Anode voltage (Zero cathode current) Va Max. 400 V

Anode voltage Va Max. 220 V

Anode voltage (Max. anode dissipation 0,8 W) Va Max. 250 V

Anode dissipation Wa Max. 1,5 W

Anode dissipation(Max. anode dissipation of section 1 plus section 2 = 2 W)Wa Max. 1,8 W

Grid dissipation Wg Max. 30 mWGrid voltage -Vg Max. 100 V

Grid peak voltage(Max. pulse duration 200 μsec)(Max. duty factor 0,1)-Vgp Max. 200 V

Cathode current Ik Max. 20 mACathode peak current(Max. pulse duration 200 μsec)(Max. duty factor 0,1)Ikp Max. 100 mA

Voltage between cathode and heatherCathode positive Vkf Max. 150 V

Cathode negative Vkf Max. 100 V

Bulb temperature (Absolute max.) tbulb Max. 170 ˚C

Grid resistor (Anode current < 5 mA) Rg max. 1 M

Tight tolerances: In these tubes the tolerance of electrical ratings are reduced in comparision with standard tubes.

Vibration and shock proof: The tube withstands accelerationns of 2,5 g at 50Hz for lenghty periods and momentary shocks of 500g for short periods.

Cathode free from Interface: The cathode establishes no interface even in case where the heated tube is operated without plate current over lenghty periods.

Heather voltage: The average heather voltage should be 6,3 V.

Variations of the heather voltage exceeding the range of 6,0 V to 6,6 V will shorten the tube life. The tolerance of heather current (column II) should be taken into account.

Substitutes: E88CC, 6DJ8, 6922


Life - 10,000 hours

Low Interface Resistance

Mechanical Quality - Shock and Vibration Resistant

Base - Noval. Gold Plate Pins.

Heating - Indirect A. C. or D. C.; parallel suply.

Heater Voltage - Vf 6.3V

Heater Current - If 300 mA

Anode Current - Ia 15 mA

Mutual conductance - S 12.5 mA/V

Equivalent noise resistance - Req 300Ω

Noise Factor (f = 200 MHz) - F 4.6 dB