6AL3

6AL3 is also designated EY88.

Description

The 6AL3 is a half-wave vacuum rectifier employing a coated unipotential cathode.

Ratings and Characteristics

The heater requires 6.3 V (AC or DC) at 1.550 A, with a tolerance of ±0.6 V. The peak heater-cathode voltage is 6600 V maximum. Direct interelectrode capacitances are 8.6 μμf from plate to cathode and heater, and 2 μμf from heater to cathode.

Maximum absolute ratings include a peak inverse plate voltage of 7500 V, a peak plate current of 550 mA, a DC plate current of 220 mA, and a plate dissipation of 5 watts without an external shield. These design-center ratings apply for operation in a 525-line, 30-frame system; the peak inverse voltage rating is applicable where the duty cycle of the voltage pulse does not exceed 15 per cent of one horizontal scanning cycle.

Mechanical and Physical

The bulb diameter is 0.750 to 0.875 inches. The base is a small-button Noval 9-pin type (JEDEC No. E9-1), with basing designation 9CB; the cap is a skirted miniature type (JEDEC No. C1-2). Pin 4 and pin 5 are the heater, pin 9 is the plate, and the cap is the cathode. Pins 1, 2, 3, 6, 7, and 8 are not used and should not be used as tie points. The operating position is any.

A French datasheet identifies this tube as type EY88, a recovery diode for line scanning circuits, with an indirectly heated parallel-supplied filament at 6.3 V and 1.55 A. That sheet gives the bulb as type A22-28, the cap as C6-1, and the base as 9C12 (noval), with any mounting position. It lists output capacitance as 8.6 pF, filament-to-cathode capacitance as 2 pF, peak inverse anode voltage as 6 kV max (average-limit system), and peak filament-to-cathode voltage as 6.6 kV max.

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 6AL3, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• Half-Wave Vacuum Rectifier
• DIODE DE RECUPERATION (filed under EY88)