6U3

6U3 is also designated EY80.

Description

The 6U3 is a booster diode with a coated unipotential cathode. It is housed in a T6½ bulb with a small button noval 9-pin base.

Construction

The maximum overall length is 3 1/16 inches, and the maximum seated height is 2 13/16 inches. The bulb length excluding tip is 2 7/16 inches ± 3/32 inch, with a maximum diameter of 7/8 inch. The tube can be mounted in any position.

Ratings

The heater requires 6.3 volts at 0.9 ampere. The plate-to-cathode capacitance is 5.5 μμF. Maximum ratings include a peak inverse plate voltage of 4000 volts, a peak plate current of 400 milliamperes, and an average plate current of 180 milliamperes. The maximum peak heater-cathode voltage (cathode positive with respect to heater) is 650 volts, with a maximum DC component of 450 volts and a maximum AC component of 160 volts.

Basing and Application Notes

The JETEC basing designation is 9BM. Pin 3 is the cathode; pins 4 and 5 are the heater; pin 9 is the plate. Pins 1, 2, 6, 7, and 8 are internally connected and should not be connected externally. The datasheet notes that the duration of the voltage pulse must not exceed 18% of one cycle and must be limited to 18 microseconds. Adequate insulation must be provided in the socket to withstand the maximum peak inverse voltage; the datasheet advises removing the cylindrical centre shield in noval 9-pin sockets to provide required insulation and removing the socket contact for pin 6 to reduce risk of flash-over and minimize leakage.

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 6U3, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• 6U3
• EY80 (filed under EY80)