JJ Electronics Amplifier Tube (T-5Y3-S-JJ)

Decent tube

Jj tubes are the best tubes for the money (period). I use a lot of amps and have all kinds of vintage and NOS tubes and they sound great but JJ tubes do the job and sound good too at a much more reasonable price.

Successfully brought my silverface Fender Bronco bucking back to full volume.

you plug the tube in and it worked, what else can be said...

This tube came to me as a none functional unit that looked wrong from the minute I took it out the box. the top inside of the bulb was crusted with a calcium like deposit, probably never even tested before being sent out. The amp worked before I installed the tube, just made a bad sounding hum after, big waste of time.

Works and performs exactly as a stock NOS 5Y3 tube would in those vintage applications I have employed this in. I have a 1928 RCA Radiola model 62 which originally uses a type 80 rectifier tube. I use this JJ 5Y3 using a removal tube adapter that allows me to use a 5Y3 (which is essentially an 80 tube with an octal base). Using a JJ tube I can spare the fixed supply for 80 tubes using a current production tube. As I prefer to listen to and use my radio collection rather than just show them off, I like to preserve NOS tubes using acceptable electrically compatible substitutes whenever possible. This JJ tube works perfectly in the Radiola, and has given me zero problems in the four months that it has been in use. I have used other JJ brand tubes in other radios (such as 12AT7) and experienced similarly good results. I would trust a JJ tube in place of NOS.

using it as a swap in for an 80 tube, its a great alternative

i like because i need this kind of product

Like most with vintage tube amps, I am a bit alarmed with the so-called 5Y3 rectifiers being sold these days and their higher output voltages. Well, you can relax with this one. I measured it compared with the Made in USA Fender labelled tube in my old SF Vibro Champ and here are the results: with 122VAC line voltage in, the Fender 5Y3 outputs a B+ of 384V and the JJ 5Y3 outputs 382V. That makes them pretty much identical. I have been practicing and gigging with this tube every week for about 6 weeks with no problems either. I just ordered another as a spare and hope JJ keeps making these! Thanks JJ!

Great value, direct replacement high quality part. My HH Scott stereo sounds good as ever!