19Y3

19Y3 is also designated PY82.

Description

The 19Y3 is a half-wave high-vacuum rectifier with a coated unipotential cathode. It has a small button noval 9-pin base and a T-6 bulb envelope. The maximum overall length is 3 1/16 inches, the maximum seated height is 2 13/16 inches, and the maximum diameter is 7/8 inch. The tube can be mounted in any position.

Ratings

The heater requires 19 volts at 300 mA. The peak inverse plate voltage rating is 700 volts, and the maximum DC output current is 180 mA. The maximum filter input capacitor is 60 μF. The peak heater-cathode voltage rating (cathode positive) is 550 volts, with a maximum DC component of 250 volts and a maximum AC component of 220 volts rms.

Applications

The Philips datasheet lists operating conditions for AC input voltages of 250, 240, 220, 200, and 127 volts rms, with corresponding DC output voltages of 195 volts (for 250, 240, 220, and 200 volts AC) and 127 volts (for 127 volts AC). A filter input capacitor of 60 μF is specified for all listed conditions. When two 19Y3 tubes are connected in parallel, the maximum filter input capacitor may be increased to 100 μF. The Philips datasheet also specifies minimum total effective plate supply impedance values for various AC input voltages.

Basing

The JETEC basing designation is 9BM. Pin 1, pin 2, pin 6, pin 7, and pin 8 are internally connected. Pin 3 is the cathode, pin 4 and pin 5 are the heater, and pin 9 is the plate.

Related Types

The Tesla PY82 datasheet states that the PY82 characteristics are identical to those of the 19Y3, and that the PY82 replaces foreign types 19Y3, 19SU, and U152. The PY82 is described as a half-wave vacuum rectifier for receivers with universal power supply, with an all-glass miniature construction and a nine-pin base. Its ratings align with those of the 19Y3: heater 19 V at 0.3 A, maximum inverse voltage 700 V, maximum rectified current 180 mA, maximum cathode-filament voltage 550 V, maximum DC component of cathode-filament voltage 250 V, maximum AC component 220 V, and maximum filter charging capacitor 60 μF (100 μF for two parallel tubes). The PY82 datasheet specifies a protective resistor in the anode circuit with minimum values of 30, 40, 80, and 100 ohms for supply voltages of 127, 200, 220, 240, and 250 V respectively. The PY82 base is S 9/12 per ČSN 35 8904, and its maximum weight is 16 g.

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 19Y3, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• 19 Y 3 PHILIPS
• JEDNOCESTNÝ USMĚRŇOVAČ (filed under PY82)

1 further designation appears alongside 19Y3 in the literature but below the evidence threshold used here, so it is not listed as equivalent.