Takatsuki TA-274B

The Takatsuki TA-274B is a precision-manufactured 274B directly heated rectifier tube made entirely in Japan, the rectifier companion to the TA-300B, built to the same cleanroom standards and individual traceability that have made Takatsuki's power tubes among the most respected in the world. Available as a single tube or matched pair, each ships with a test report and storage box.

Type and Technology

Directly heated twin diode rectifier, 274B type. Kovar glass envelope, lead-free, heat-resistant above 300°C, with matched-expansion Kovar lead-wire for elimination of vacuum leakage. Proprietary tri-metal anode construction. High-purity tungsten grid wires controlled to 1 micron accuracy. Nitrogen storage of all components between production steps to prevent oxidation. Laser-engraved serial number on upper mica for complete lot traceability. Hand-assembled by skilled artisans in cleanroom conditions. Rated lifespan of approximately 7,000 hours when used with a first filter capacitor of 10µF or less after the rectifier, staying within this specification ensures stable long-term performance.

Sound Character

Rectifier tube quality directly affects the character of the B+ power supply and therefore the entire amplifier's tonal character, the TA-274B brings Takatsuki's manufacturing precision to rectification, producing a stable, consistent, and low-noise high-voltage supply that allows the power tubes downstream to perform at their best. A natural partner for TA-300B equipped amplifiers, or any 274B-compatible design.

Best For

274B rectifier owners looking for a premium Japanese-made replacement with exceptional manufacturing quality and lot-to-lot consistency, particularly suited to amplifiers using the TA-300B.

Please note: The TA-274B is rated for approximately 7,000 hours lifespan when used with a first filter capacitor of 10µF or less after the rectifier. Check your amplifier's first capacitor value before purchasing.

What's in the Box

• Takatsuki TA-274B tube (single or matched pair)
• Individual test report
• Storage box

Specifications