A Mullard GZ34 might be the last rectifier tube you ever need to buy for your amplifier. Seriously, they seem to last forever. I've worked on blackface Fender amps from the 1960's that still have their original Mullard GZ34 working just fine.
At one time, the Sovtek and Chinese were the only new production GZ34 available. I have personally had mechanical rattle problems with the Sovtek and heard many reliability issues with the Chinese versions. The JJ GZ34, IMO, are the best new ones currently out there.
As far as performance in the short term, you probably won't notice much difference, if any, between any of them. Only time will tell if the JJ will last and last like the Mullard does.
Post by bustertheboy on May 25, 2006 14:27:00 GMT -7
i've used a mullard gz37, which drops the volume about 20v in a vibrolux and it was beautiful and built for life i think there are threads elsewhere here wher people compare mazdas and other rectifiers if it's anything like other tubes, nos always perform better and certainly are longer lasting and closer to original specs i know a rectifier is only supposed to change AC to DC, but i think there might be a bit more magic to it than that- ask myles directly, or even dr z
Strat, Teles, a couple of hollow bodies, lap steel, various resonators
Carmen Ghia head
1x12 cab EV12L
212 cab Red Fang/WGS v30 clone
Lots of pedals, lots of changes
SG, Thanks for your input. Does the Mullard perform better, i.e tone, than the JJ? Rick
What's "better"? You must realize that there's no consensus on what good tone is...otherwise there would be only one type of amp available instead of 2000.
Lot's of my customers feel that Mullards and other NOS 5AR4s sound better than Sovteks. One reason is that most Russian and other new production rectifiers aren't really what their labels say they are, similar, but not the same.
On thing's for sure, a NOS rectifier will sound a lot better (for 20 or 30 years) after your Sovtek dies after 1 or 2 years.
Mike Kropotkin KCA NOS Tubes & Amp Repair The World's Largest Selection of Guitar Amp Tubes www.kcanostubes.com
Well I got my Maz 38 back from Doc Z's surgery. I have a Sovtec GZ34 in the amp. The V1 per Doc's replacement is a E-H12AX7EH. The amp simply stated sounds awesome! So, for grins, I replaced the Sovtec with an older Mullard (from a Fender amp). The Maz tone was still there, however, the over feel was much "stiffer". I swapped the tubes back and bingo! The creamy response is back. I had similar results to the older Mullard with a newer JJ GZ34. So, this Maz keeps the sovtec. Bottom line is, Doc Z knows what works best to keep his amps sounding the best. Rick
GuitarZ: Best Pandemic Comment - Delivery guy shows up. As we're social distancing, I look at myself in brown loafers, black socks, gym shorts, t-shirt and say "I realize this is not my best look". His response "You can wear whatever you want to the apocalypse."
May 1, 2020 14:39:30 GMT -7
roscoenyc: read a newspaper.
May 19, 2020 17:20:32 GMT -7
roscoenyc: You know in school when they talked about "your permanent record"? Well, this is it! Learn to spell! Don't be stupid!
May 21, 2020 8:19:01 GMT -7
premiumplus (Dave): Due or do? Which or witch? Knob or nob? Their or there? Bass or base? Too much time on my hands...
May 24, 2020 6:31:30 GMT -7
roscoenyc: Ah, the incessant tire kickers. oh jeez.
May 25, 2020 6:57:46 GMT -7
GuitarZ: Needed some noise to fill a break in a tune I'm recording. It was too quiet. Just happened to have some High Quality Dr Z Ghia noise to fill the void. "Heal Your Sound with Dr Z! It's not just a guitar tone prescription!"
Jun 13, 2020 8:29:27 GMT -7
GuitarZ: Must be great to be a skunk. Eating bird food about 10' from our sun room. I'm clapping and yelling. At best, it might have given me one "yea what?" look while continuing to dine. At one point, there were two skunks and two racoons.
Jun 14, 2020 18:49:33 GMT -7
captainron (Ron): Hueter Toledo, just another business of today that doesn't care about tomorrow!
Jun 25, 2020 12:51:43 GMT -7
KeithA: Hueter Toledo....that business is gone to the dogs
Jun 26, 2020 8:22:26 GMT -7
easyed: Guitar Z, I encountered to ultimate garbage raiding combo once. We'd been having problems with the garbage cans being raided by raccoons for weeks. Late in the evening I heard rattling at the cans. I went out and found that he'd allied with a skunk. "OK"
Jun 30, 2020 11:40:27 GMT -7
GuitarZ: EasyEd - Someone at work topped us both. The inside of their car had been somewhat ransacked. They were blaming their son. They checked the video. It was a Bear! I'll stick with the racoons, skunks, foxes, and squirrels.
Jul 1, 2020 16:47:50 GMT -7
bigboki: In this age and time when everybody are struggling and especially S&Ms I am amazed to see that kind of ignorance. I am really sorry for your experience dear Dr Z but it is for the better. You don't want to do business with those kind of people anyway.
Jul 4, 2020 8:17:40 GMT -7
GuitarZ: Didn't want to restart the plumbing thread, so I figured I'd ShoutBox this. How the heck does cleaning the aerator on a faucet cause a leak to start under the faucet? Huh? Arggggh!!!!
Jul 10, 2020 7:40:17 GMT -7
The Bad Poodle Experience: well, Mike, it shouldn't have been the cause of a leak. double-check your work.
Jul 10, 2020 12:56:49 GMT -7
GuitarZ: I updated in the Plumbing thread that the Moen website says that a faulty aerator can cause a handle/base leak. Eiyy! I really don't understand how plumbing works. I was ready to double check all connections. But, the leaking stopped with cleaned Aerator.
Jul 11, 2020 18:13:56 GMT -7