ECC803S

ECC803S has no equivalent designation confirmed by the archive.

The ECC803S is a miniature all-glass double triode of special quality with separate cathodes and a high amplification factor, mounted on a nine-pin base.

Construction

Both triodes are brought out separately, and the centre tap of the heater is brought out to a separate pin. The tube has indirect heating with an oxide cathode and can be operated with parallel or series supply of AC or DC. The TESLA datasheet gives the base as S 9/12 per ČSN 35 8904 and the maximum weight as 12 g.

Ratings

The heater voltage is 6.3 V ±5% for parallel-connected heaters and 12.6 V ±5% for series-connected heaters, with a heater current of 0.3 A at 6.3 V and 0.15 A at 12.6 V. Maximum ratings include an anode voltage of 300 V, a cold anode voltage of 550 V, an anode dissipation of 1 W, a voltage between cathode and heater of ±100 V, and a bulb temperature of 170 °C.

Characteristics

At an anode voltage of 250 V and a grid bias of −2 V, the anode current is 1.25 +0.5 mA, the amplification factor is 95 ± 20, and the internal resistance is 59 kΩ. The input capacitance is 2.0 ± 0.4 pF, the output capacitance of anode I is 0.4 +0.2/−0.1 pF, and the output capacitance of anode II is 0.3 +0.2/−0.1 pF. The grid-to-heater capacitance is less than 0.15 pF, and the anode I to anode II capacitance is less than 1 pF. The maximum negative grid current is less than 0.4 μA at Uf = 12.6 V, Ua = 250 V, Ug1 = −2 V. The maximum heater insulation current is less than 5 μA at Uf = 12.6 V, Uk/f = ±100 V, and the maximum inter-electrode insulation current is less than 5 μA at Uf = 12.6 V, Uss = 200 V.

Applications

The ECC803S is intended for use in low-frequency amplifiers, phase inverters, and driver stages. The TESLA datasheet states that the ECC803S replaces the foreign type 6057.

Original manufacturer datasheets for ECC803S, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• DVOJITÁ NF TRIODA