801A

801A has no equivalent designation confirmed by the archive.

The 801A is a power vacuum tube intended for use in radio-frequency power amplifier, audio-frequency power amplifier, and modulator applications. It is a four-electrode tube with a filamentary cathode, housed in an ST-16 bulb with a 4-pin base.

Construction

The 801A has a maximum overall length of 5-3/8 inches and a maximum diameter of 2-1/16 inches. The RCA Radiotron Division datasheet specifies a vertical mounting position with the base down, or a horizontal position with the plane of the plate vertical.

Electrical Characteristics

The 801A has an amplification factor of 3. Interelectrode capacitances are 6.0 μμf from grid to plate, 4.5 μμf from grid to filament, and 1 μμf from filament to plate. In Class A operation at a plate voltage of 425 volts, the plate resistance is 5000 ohms and the transconductance is 1600 μmhos.

Ratings and Applications

For Class A audio-frequency power amplifier and modulator service, the maximum D-C plate voltage is 600 volts and the maximum plate dissipation is 20 watts. The 801A is also used as a radio-frequency power amplifier in Class B telephony service, and as a radio-frequency power amplifier and oscillator in Class C telegraphy service.

Original manufacturer datasheets for 801A, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• 801A

1 further designation appears alongside 801A in the literature but below the evidence threshold used here, so it is not listed as equivalent.