Vacuum Tube - 5U4GB, JJ Electronics

Vacuum Tube - 5U4GB, JJ Electronics

JJ Electronics
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The JJ Electronic 5U4GB is an excellent choice for an economically priced tube rectifier. Used in many Hi-Fi and guitar amplifiers, JJ delivers a robust and solidly built tube. This full wave rectifier will work in any 5U4 application.

Item ID:
JJ Electronics Part Number:
JJ Electronics
RoHS Compliant
Body Height105 mm
Filament Current (If)3 A
Filament Voltage (Uf)5 V
Item Diameter38 mm
Item Height120 mm
Packaging Information
Packaging Dimensions1.6 in. × 1.6 in. × 5.6 in.
Weight (Packaging)0.1323 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet486.21 KB
Questions? Contact us at [email protected], or give us a call at 480-820-5411

Product Reviews

5.00 out of 5 based on 6 reviews
Ken Stiles - October 31st, 2023
5 out of 5

The JJ 5U4GB works great in my 20 watt audio amp, replacing a physically smaller Russian full wave rectifier tube. Check the measurements to ensure a fit in your application.

Surfer - May 13th, 2022
5 out of 5

Good long lasting replacement tube.

Henry Spadoni - March 5th, 2022
5 out of 5

Got these to replace tubes damaged in transit inside an amp. Identical replacements that work as expected. Shipment and delivery were timely and quick, and well packed.

Gary Cunningham - July 28th, 2020
5 out of 5

Great tubes, great price and fast shipping! These guys are the best!!

Jeff Medwin - October 9th, 2018
5 out of 5

Very nice sounding tube, sorta' luscious, sweet, and full range. My NOS favorite 5U4GB used to be a Tung Sol, but this out-performs NOS tubes in my two stage direct coupled amps. I LOVE what a DIRECTLY heated rectifier tube does. I have been told the Electro Harmonix 5U4GB ( handled by Antique Electronic, and reasonably priced !! ) has a little more " snap " to it, dynamically, but I was also told it takes 200 Hours of playing to break-in to full bloom. This JJ takes maybe only 15 hours to break in - in my DC SET amp circuits. Amazing, two modern tubes that each beat the old timers.

gary frazier - August 17th, 2018
5 out of 5

i bought this tube for a 68 fender bandmaster reverb works great .

Substitute Products

The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.