6EJ7

6EJ7 is also designated EF184.

The 6EJ7 is a high-transconductance sharp-cutoff pentode in 9-pin miniature construction, with a glass bulb and a coated unipotential cathode.

Construction

The 6EJ7 uses JEDEC basing diagram 9AQ and can be used in any mounting position. The Tung-Sol datasheet gives a grid #1 to plate capacitance of 0.005 pF maximum, an input capacitance (G1 to H+K+G2+G3+I.S.) of 10 pF, and an output capacitance (P to H+K+G2+G3+I.S.) of 3 pF. The Philips datasheet (EF 184) gives a grid #1-to-grid #2 capacitance of 2.8 pF.

Ratings

The Tung-Sol datasheet gives a heater voltage of 6.3 volts and a heater current of 300 mA. Maximum ratings from the same sheet are: heater-cathode voltage 150 volts, plate voltage 250 volts, plate dissipation 2.5 watts, grid #2 dissipation 0.9 watts, cathode current 25 mA, and grid #1 circuit resistance 1.0 megohm. The Philips datasheet (EF 184) additionally states that during a heating-up period not exceeding 15 seconds, the maximum grid #2 dissipation may be 1.5 W, and gives a maximum grid #1 voltage (for Ig1 = 0.3 μA) of 1.3 V.

Characteristics

At a plate voltage of 200 V, grid #3 voltage of 0 V, grid #2 voltage of 200 V, and grid #1 voltage of -2.5 V, the Tung-Sol datasheet gives a transconductance of 15000 micromhos, an amplification factor (G2 to G1) of 60, and a plate resistance of 0.35 megohm. The Philips datasheet (EF 184), at the same operating point, gives a typical transconductance of 15 mA/V, a typical anode current of 10 mA, a typical grid #2 current of 3.8 mA, and a typical internal resistance of 350 kΩ.

Applications

The 6EJ7 is designed for service as an IF amplifier in television receivers.

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 6EJ7, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• EF 184 PHILIPS (filed under EF184)
• — TUNG·SOL -