Can I put jj GZ34 instead 5U4GB?

[tofisi]

Can I put jj GZ34 instead 5U4GB? Now Im running my mark V with 4x el34 sed C.

 

[Anonymous]

Call mesa.......

 

[eudaimonia02912]

Call mesa.......

Mesa will say, "Don't put anything other than our tubes in, as it will void your warranty." So, they won't be helpful.

 

[Anonymous]

Call mesa.......

Mesa will say, "Don't put anything other than our tubes in, as it will void your warranty." So, they won't be helpful.

that's a good point..... at the same time, mesa carry both tubes GZ34 and 5U4GB rectifier type. it will be a question of compatibility between GZ34 and 5U4GB.

 

[MrMarkIII]

If it blows, don't blame me:
http://acruhl.freeshell.org/mga/main/rectifiers.html

All things being equal, a GZ34 supplies more voltage than the 5U4GB. Perhaps only Mesa can tell you if that is safe.

The only direct experience I can offer is with the Heartbreaker. You can run EL-34s with the 5U4GB, but the manual says only at 60 watts vs. 100 (two tubes are off). So maybe the Mark V would tolerate the 5U4GB in the 45 watt mode.

I'm sure Mesa will sell you their brand of 5U4GB, so the real question is if the amp design will accommodate the 5U4GB.