UX4 / UX-4 Draht-/Chassis Fassung für 300B / 2A3 / 572B

High-Quality UX4 Chassis Socket for 300B and 2A3

This robust tube socket (UX4 / 4-pin) is specifically designed for chassis mounting and point-to-point wiring. It is ideally suited for use in high-end tube amplifiers, hi-fi electronics, and demanding DIY audio projects. The insulator is made of heat-resistant white ceramic, guaranteeing excellent thermal stability and high electrical insulation. Thanks to the precise silver-plated fork-spring contacts, you benefit from consistently reliable signal transmission, a secure tube grip, and minimal contact resistance. Whether for building new high-end amplifiers or for the restoration of historic equipment, this socket offers top-tier mechanical and electrical reliability.

Technical Data

Tube Examples

The socket is mechanically compatible with standard UX4 tubes. Suitable examples include:

• Power triodes and rectifiers: 300B, 2A3, 572B, 811A, 866A, 872A, 274A

Note: A shared base system does not guarantee electrical interchangeability. Pinout, heater ratings, and operating values must always match the respective circuit. Alternative designations for this base system include UX-4, 4-Pin, 4-Pin Tube Socket, and 4-Pol.

Chassis Mounting Practice Questions

What mounting distance is required for installation?

For mounting on the chassis, you need a precise hole spacing (mounting centres) of 45 mm. The socket features two practical slotted holes with a width of 4.5 mm, which facilitate installation and alignment.

Which tube types is this socket suitable for?

The chassis socket accommodates classic 4-pin tubes with a UX4 base. Typical representatives are legendary triodes such as the 300B or 2A3, as well as rectifier tubes like the 274A or 866A.

What type of connection does this socket offer?

The socket is equipped with sturdy solder lugs and is therefore perfectly suited for traditional point-to-point wiring in high-quality tube amplifiers.