ECC801S

ECC801S has no equivalent designation confirmed by the archive.

The ECC801S is an HF-Doppeltriode (RF twin triode) with indirectly heated cathodes connected in parallel and a Pico 9 (Noval) base. It is designed to satisfy the specifications in accordance with Mil-E-1/3D of type 12AT7W.

Construction and Ratings

The ECC801S has a special cathode free from interface. Its maximum dimensions conform to DIN 41 539, Nenngröße 40, Form A, and its maximum weight is 14 g. The heater may be operated at 6.3 V or 12.6 V; heater current is 300 mA ± 15 mA at 6.3 V and 150 mA at 12.6 V. The tube can be switched on and off at least 2000 times (1 minute on, 1 minute off) at Uf = 7.5 V (base pin 4/5 and 9), Uf/k- = 135 V, Ua = Ug = 0 V.

Absolute maximum ratings include an anode voltage (Uαo) of 600 V, an anode voltage (Uα) of 330 V, an anode dissipation (No) of 2.8 W, a negative grid voltage (Ug) of -55 V, a grid dissipation (Ng) of 100 mW, a cathode current (lk) of 18 mA, and a heater-cathode voltage (Uf/k) of 100 V. The maximum grid circuit resistance (Rg) is 0.25 MΩ with fixed grid bias and 1 MΩ with cathode grid bias. The maximum heater-cathode resistance (Rf/k) is 20 kΩ. The maximum bulb temperature is 200 °C.

Reliability and Life

The ECC801S has a P-factor of approximately 1.5% failures per 1,000 hours. A lifetime of 10,000 hours, averaged over 100 tubes, is guaranteed, provided the heater voltage is kept within ±5% (absolute limits). End of life is defined as anode current (Ia) reduced from its initial value to 6 mA, transconductance (S) reduced from its initial value to 3.8 mA/V, or grid current (Ig) increased from its initial value to more than 1 μA. The tube can withstand vibrations up to 2.5 g at 50 Hz for long periods and shock accelerations up to 500 g for short periods.

Application

The ECC801S is intended for use as a resistance-coupled amplifier for low-impedance signal sources with Ri of about 200 Ω.

Original manufacturer datasheets for ECC801S, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• ECC801S