17Z3

17Z3 is also designated PY81.

Description

The 17Z3 is a booster diode for time base circuits in AC/DC television receivers. It has a coated unipotential cathode and a small button noval 9-pin base.

Construction and Mounting

The maximum overall length of the 17Z3 is 3 3/16 inches, with a maximum seated height of 2 15/16 inches. The bulb length, excluding tip, is 2 7/16 ± 3/32 inches. The tube can be mounted in any position.

Ratings

The basing designation is 9 CB. Pins 4 and 5 are the heater connections, pin 9 is the plate connection, and the top cap is the cathode connection. Pins 1, 2, 3, 6, 7, and 8 are not to be connected.

The heater requires 17 volts at 0.3 ampere. The maximum plate current is 150 mA, and the maximum peak plate current is 450 mA. The maximum booster condenser value is 4 µF. The maximum pulse duration is 18% of a cycle, with a maximum of 18 microseconds.

The absolute maximum voltage is 5600 volts. The maximum peak voltage between cathode and plate (cathode positive) is 4500 volts. The maximum peak voltage between heater and plate (heater positive) is 3000 volts. The maximum positive peak voltage between cathode and heater is 4500 volts. During the scanning period, the maximum peak voltage between cathode and heater (cathode positive) is 800 volts, and the maximum voltage averaged over the scan is 500 volts.

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 17Z3, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• **PHILIPS** (filed under PY81)
• 17Z3