JJ GZ34 / 5AR4 Vacuum Tube

Glad this tube (5ar4) was available and at a reasonable price. Some dealers are asking $75.00 or more for tubes today. The Fender amplifier I have is in demand and it should be able to be repaired at a reasonable cost. I purchased filter capacitors for this amplifier also from Tube Depot. They were also reasonably priced. My 1963 amplifier works like new. The orders came promptly without any errors.

A+

JJ tubes are reliable and good value. I used this as a replacement rectifier for the NOBSOUND amp. Worked great!

Works great, fast delivery from AmplifiedParts - wish they were still selling it, I want to order a backup!

Items arrived in great condition, as described, on time!

These tubes where exactly what the 64 Fender VibroVerb needed

This rectifier tube got my Dynaco ST-70 up & running again soon after the old one failed, in other words as soon as I could order & receive this tube and plug it in, which was a very short time.What's not to like? It's a necessary tube and it works.

Sounded great in my Lafayette KT-310... For the EIGHT (8) hours that it lasted. There were some strange, intermittent popping noises when I first fired up the amp. Then they went away. All of a sudden on day two- The fuse blew. OK. I replaced it, turned the amp back on and watched. 10 seconds later, there was a flash of light in the GZ34. Fuse pops again. I took the GZ34 out, replaced the fuse, and powered back up. Power tubes kicked on, 5 minutes, no flashes, no pops, no blown fuse. I put the rectifier back in, took the power tubes out, powered up- Less than 10 seconds, flash of light in the rectifier, fuse blows. If it lasted a week, I'd have given it 2 stars. A month, maybe three stars with some understanding. But this rectifier couldn't even give me 24 hours of service. Very poor. I might have considered it a fluke, but I have read that these are terribly unreliable, so this is obviously a plagued rectifier. The JJ power tubes on the other hand are still kicking on day four.