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  • PS-274B Audio Vacuum Tube Glowing

Preferred Series 274B / 5U4G

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Product code: PS-274B

Availability: Usually ships within 24 hours.

USD $‎31.95 Each

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1 – 4USD $‎31.95
5 +USD $‎29.95
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  • The Preferred Series 274B tube is a full-wave rectifier that is very similar to the classic 5U4G. This 274B tube's filament draws 2.5A of current. This current draw makes it acceptable for many amps originally designed for a 5AR4/GZ34 tube. Our PS-274B tube is a beautiful large coke bottle shaped rectifier tube with large black plates. The installed height is 5 inches. It's width is 2.5 inches at the widest point. Space may be an issued in some amps so be sure to check this.

    This tube is produced for us in China by the Shuguang factory. A new evacuator is utilized for a much longer time period increasing vacuum over 100 times more than their current 5U4G tube. A new cathode coating process provides a much smoother finish improving electron flow and they are burned in at high voltages for a much longer time for improved stability. The end result of utilizing these new production materials, techniques, and equipment is a premium rectifier tube at a much lower cost than the NOS Western Electric 274B.

    As a Preferred Series tube these are further tested on our digital high voltage equipment to make sure the tubes selected for you will provide outstanding tone and performance.

    Warranty: The Preferred Series 274B tubes carry a 6 month extended warranty.

    Preferred Series tubes Other Preferred Series tubes          5U4 Types5U4 Types
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  • Warranty Information and Return Policy

    Warranty Period: 6 months

    All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

    If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

    - contact us to get a return authorization
    - return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

    Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

    We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

    These guidelines may be updated without notice.


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