Vacuum Tube - 5AR4 / GZ34, JJ Electronics

JJ Electronics
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Vacuum Tube - 5AR4 / GZ34, JJ Electronics

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The JJ Electronic GZ34 / 5AR4 is rugged rectifier at a reasonable price. JJ has a reputation for building sturdy tubes and this one is no exception. Users report that the JJ GZ34 / 5AR4 is a reliable rectifier in their Vox, Fender, and hifi amplifiers.

RoHS Compliant
Item ID:
JJ Electronics Part Number:
GZ34S - 5AR4
JJ Electronics
Product Measurements by Type
Body Height79.0 mm
Filament Current (If)1.9 A
Filament Voltage (Uf)5 V
Item Diameter33.3 mm
Item Height93.0 mm
Packaging Information
Packaging Dimensions1.6 in. × 1.6 in. × 4.8 in.
Weight (Packaging)0.1063 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet460.63 KB

Questions and Answers

Click each question to see its answers.
Asked by Anonymous on February 13th, 2017.
Matt H
February 15th, 2017
If your amp calls for a 5AR4/GZ34 then these should work. I would consult your manual or examine your amp to see what type of rectifier tube it has in it.
Asked by Anonymous on September 28th, 2017.
Matt H
September 28th, 2017
According to our tube substitution handbook, the 5AR4 is not a substitute for the 5U4GB.
Asked by Anonymous on January 3rd, 2018.
Matt H
January 3rd, 2018
We are not techs and can not help you troubleshoot your amp. The best thing to do is take your amp to a qualified tech.

Product Reviews

5.00 out of 5 based on 3 reviews
- February 2nd, 2021
5 out of 5

I haven’t put in my tubes yet but the service, education and advice I received during my call to Amplified Parts will keep me coming back. It was my first time buying tubes and the salesperson made it super simple. They were also the only place that had all the tubes for my Sky King. Everywhere else I had to use multiple sites to piece together the order. Tube were shipped quickly and packaged well. Getting together the order for my Fargen Blackbird next.

- January 11th, 2021
5 out of 5

This JJ 5AR4 works just like it should and Amplified Parts is the place I get my tubes because they are honest. Fast, accurate service is what you get here.

- October 6th, 2009
5 out of 5

Who has the $$$ to buy an NOS 5AR4? I never realized how much a rectifier tube can effect tone. I have a SUNN 200S bass head that has been having some issues. I replaced the old Amperex 5AR4 with a JJ and now my amp is much louder and has more punch. Granted, I don't know if this tube will last 40 years in the same head, but it's good to know that there is a high quality rectifier being made today. Highly recommended!

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.