6CJ5

6CJ5 is also designated EF41.

Description

The 6CJ5 is a remote cut-off R.F. pentode with a coated unipotential cathode, a glass bulb, and an E8-30 base.

Construction and Physical Characteristics

The tube has a maximum overall length of 2-3/8 inches (60 mm), a maximum seated height of 2-1/16 inches (53 mm), and a maximum diameter of 7/8 inch (22 mm).

Ratings

The heater is rated at 6.3 volts with a current of 0.2 amperes. The maximum plate supply voltage is 300 volts, and the maximum plate dissipation is 0.3 watts. The maximum Grid No. 2 supply voltage is 10 volts; however, the maximum Grid No. 2 voltage is 125 volts when plate current is below 3 mA, and 50 volts when plate current is 6 mA. The maximum Grid No. 2 dissipation is given as 3 volts. The maximum cathode current is 20,000 ohms, the maximum Grid No. 1 circuit resistance is 20,000 ohms, the maximum voltage between heater and cathode is 50 volts, and the maximum external resistance between heater and cathode is 20,000 ohms.

Capacitances

The plate to Grid No. 1 capacitance is less than 0.002 pF, the Grid No. 1 to heater capacitance is less than 0.05 pF, the input capacitance is 4.7 pF, and the output capacitance is 8.0 pF.

Typical Operating Conditions

At a plate voltage of 250 volts and a Grid No. 2 voltage of 100 volts, the plate current is 6 mA and the Grid No. 2 current is 1.7 mA.

Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.

Original manufacturer datasheets for 6CJ5, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• EF 41 Variable-mu R.F. pentode (filed under EF41)
• 6CJ5

2 further designations appear alongside 6CJ5 in the literature but below the evidence threshold used here, so they are not listed as equivalent.