Vacuum Tube - 5AR4 / GZ34, JJ Electronics
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.
JJ Electronics Part Number:
GZ34S - 5AR4
|Body Height||79.0 mm|
|Filament Current (If)||1.9 A|
|Filament Voltage (Uf)||5 V|
|Item Diameter||33.3 mm|
|Item Height||93.0 mm|
|Packaging Dimensions||1.6 in. × 1.6 in. × 4.8 in.|
|Weight (Packaging)||0.1063 lbs.|
|Specification Sheet||All Models|
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2 answers I'm trying to determine if my rectifier tube is bad, or is it the power transformer? I'm getting 300 VAC on pins 4 & 6 of my 5AR4 and B+1 measures 350Volts. I've new filter caps and new resistors on the all the caps in the dog house. Any ideas? I do not have a tube tester. Any help would be appreciated. If it's not the rectifier, I guess the power transformer? Funny, I had higher than normal voltages on V1 pin 2 + pin 6 and so on up the circuit., now it is lower than normal, 180, should be 210. I have a Super Reverb. thanks and Happy New Year!!
Asked by Anonymous on 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.
5AR4 rectifiers are direct filament rectifiers. When they get old, their output voltage takes a hit. That isn't true for transformers. Either they work or they don't an open winding on a tranformer means you get nothing, zip, nada. A shorted primary on a transformer means the transformer hums like a harmonica and quickly overheats and self-destructs. A shorted secondary on a transformer will lower the output, but that is so rare, I've never seen it. I've been a service tech for 50 years. If I've never seen it, it may not even exist. Theoretically, it can happen. If that's what you've got, it will be the first time.
1 answers Will this rectifier tube replace a full wave rectifier In a fender pro sonic?
Asked by Anonymous on February 13th, 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.
1 answers I have a Fender Vibrolux amp. Want to change the 5u4gb with a 5ar4 rectifier. Will it be ok?
Asked by Anonymous on September 28th, 2017.
According to our tube substitution handbook, the 5AR4 is not a substitute for the 5U4GB.
The following items can be substituted for this product. While not necessarily exactly the same, they will function as replacement items in your project.
Great product. better price than any where else I looked. works great and good quality for the amount paid. will buy my tube from amplified parts.
I had put in completely new J&J tubes. Come to find out, the J&J rectifier Tube was constantly burning out my fuse. I found this out when I took my Orange amp into a, recommended by orange, amp repair site, technicians. They stated J&J isn't the best tubes for this amp. "Orange TC AD30 combo".
Also to be clear I brought the amp in for other maintenance issues and repairs after I replaced the tubes with a complete set of J&J Tubes. The Rectifier was noted after all other repairs were completed and the Rectifier tube was determined to be blowing out the fuses. He replaced it with a Sovtec tube
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.
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.
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!