3C4

3C4 is also designated DL96.

The 3C4 is a vacuum tube with a coated filament, housed in a T5 1/2 bulb with a miniature button 7-pin base. The tube has a maximum overall length of 2.205 inches, a maximum seated height of 1.955 inches, a bulb length excluding tip of 1.580 inches plus 0.094 inches, and a maximum diameter of 3/4 inch. Its mounting position is any.

Construction and Basing

The 3C4 uses the JETEC 6BX basing designation. Pin 2 is the plate; pin 3 is grid No. 2; pin 4 is not connected; pin 5 is grid No. 3 and the filament centre tap (negative); pin 6 is grid No. 1; and pin 7 is the filament (positive). The filament is rated at 1.4 volts and 50 milliamperes, with a minimum operating voltage of 1.1 volts and a maximum of 1.6 volts.

Ratings

The maximum battery voltage is 90 volts. The maximum plate voltage is 90 volts, and the maximum plate dissipation is 0.6 watt. The maximum grid No. 2 voltage is 90 volts, with a maximum grid No. 2 dissipation of 0.2 watt. The maximum cathode current without input signal is 2 times 3.1 milliamperes. The maximum grid No. 1 circuit resistance is 2 megohms.

Electrical Characteristics

Capacitances include a plate to all other electrodes value of 4.4 micromicrofarads, a grid No. 1 to all other electrodes value of 4.9 micromicrofarads, and a maximum grid No. 1 to plate capacitance of 0.3 micromicrofarad. At a plate voltage of 64 volts and grid No. 2 voltage of 64 volts, the transconductance is 1250 micromhos, the plate resistance is 0.125 megohm, and the amplification factor of grid No. 2 with respect to grid No. 1 is 7.6. At a plate voltage of 85 volts and grid No. 2 voltage of 85 volts, the transconductance is 1350 micromhos, the plate resistance is 0.125 megohm, and the amplification factor of grid No. 2 with respect to grid No. 1 is 7.8.

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 3C4, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• Leistungskurven Gegentakt-B-Betrieb $U_a = U_{g2} = 61,5 \text{ V}$ (filed under DL96)
• **PHILIPS**

2 further designations appear alongside 3C4 in the literature but below the evidence threshold used here, so they are not listed as equivalent.