5933

5933 has no equivalent designation confirmed by the archive. Completed sales put the typical price at $24.98 per tube.

Overview

The 5933/P17W is a beam power tetrode. It can be used as an amplifier, modulator, or oscillator.

Construction

The 5933/P17W has an oxide cathode with indirect heating. It includes a control grid (grid 1) and a screen grid (grid 2). The anode connection is made via an anode cap. The tube features a reinforced internal structure for high mechanical robustness and reliability. It can be mounted in all positions. The net weight is 60 g.

Ratings

The filament voltage is 6.3 V ± 5%, with a filament current of 0.9 A. The datasheet specifies a maximum filament current of 990 mA and a minimum of 810 mA. The anode dissipation can reach 25 W in natural cooling.

Maximum anode voltage ratings are valid for a maximum operating frequency of 50 MHz. For class C telegraphy operation at 60 MHz, the maximum anode voltage is 600 V and the maximum screen grid voltage is 200 V. For class C telephony operation with 100% modulation, the maximum anode voltage is 475 V and the maximum screen grid voltage is 225 V. At 125 MHz, the maximum anode voltage and applied power are limited to 50% of the values given for 50 MHz.

Characteristics

The datasheet gives a transconductance of 4.5 to 6.5 mA/V. The maximum grid 1 to anode capacitance is 0.2 μμF without external shielding, measured with a shield of 53 mm inner diameter; with external shielding, the maximum is also 0.2 μμF. The input capacitance is 11 μμF without external shielding, and 8 to 14 μμF with external shielding. The output capacitance is 7 μμF without external shielding, and 5.3 to 8.7 μμF with external shielding. The datasheet specifies a maximum filament-to-cathode current of 100 μA, a minimum insulation resistance of 50 MΩ between grid 1 and other electrodes at 100 V, and a minimum insulation resistance of 50 MΩ between anode and other electrodes at 300 V. The maximum vibratory voltage is 250 mV.

Applications

The 5933/P17W is specially intended for military and professional equipment. The useful power is 30 to 40 W for frequencies below 60 MHz, decreasing by 50% at 125 MHz. The datasheet gives an oscillator output power of 33 W at 15 MHz and 28 W at 60 MHz under specified conditions. The datasheet also includes operating conditions for class AB1 power amplification and low-frequency modulation for two tubes. The datasheet is published by Compagnie générale de télégraphie Sans Fil.

Per-tube prices from completed sales, 2026-05-10 to 2026-09-10. Matched pairs and quads are divided out. See the price index for how these move over time.

Original manufacturer datasheets for 5933, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• TETRODE A FAISCEAUX DIRIGES 5933/P17W