4B32

4B32 is also designated GXU2.

The 4B32 is a xenon-filled half-wave rectifier for use in high-voltage circuits, housed in a hard glass envelope with a well-supported mount.

Construction

The 4B32 uses a T-18 nonex glass bulb with a medium metal cap and a jumbo 4-pin base, type A4-29. It has a jumbo bayonet 4-pin base. The overall length is 7.6 to 8.5 inches, the maximum diameter is 2.32 inches, and the maximum net weight is 7½ ounces. The tube may be mounted in any position.

Ratings

The filament of the 4B32 is an efficient, fast-heating oxide-coated type, operating at 5.0 volts plus or minus 5 percent with a current of 7.25 amperes at 5.0 volts. It can be operated on AC or DC. The maximum peak inverse voltage is 10,000 volts. Maximum cathode currents are 5.0 amperes peak, 1.25 amperes average, and 50 amperes surge (with a maximum duration of 0.1 seconds). The maximum averaging time is 15 seconds, and the maximum supply frequency is 150 cycles per second. The ambient temperature limits are -55 to +70 degrees Celsius. The minimum cathode heating time is 30 seconds. The average anode voltage drop is 12 volts, the peak anode voltage drop is 16 volts, and the critical anode voltage is 50 volts.

Operation

The 4B32 is designed to operate over a wide temperature range without the necessity of heating or cooling devices. Quadrature excitation of the filament is recommended for obtaining the longest tube life.

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 4B32, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• TUNG-SOL -
• APPROXIMATE DATA (filed under GXU2)

1 further designation appears alongside 4B32 in the literature but below the evidence threshold used here, so it is not listed as equivalent.