My JCM900 should arrive today!!

[greendy123]

Re: My JCM900 should arrive today!!

so i need 2 el34 valves and 2 12AX7 valves and 1 12X7 valve. correct???

can i use any brand? can i fit them myself or so i need to take them in to a professional?

It's 3 12ax7 tubes and for el-34's I heard JJs, Svetlana, and Sovteks are good. The 12ax7's are pre-amp tubes, these you can install on your own. The power tubes need to be brought to amp tech to bias and install. Biasing just means setting the current going through the tubes, this part requires you go inside the amp where the wiring is and is really dangerous to play around. Also check the vault section a pre-amp tubes for high gain are recommended there.

 

[SepultuRick]

Re: My JCM900 should arrive today!!

It's 3 12ax7 tubes and for el-34's I heard JJs, Svetlana, and Sovteks are good. The 12ax7's are pre-amp tubes, these you can install on your own. The power tubes need to be brought to amp tech to bias and install. Biasing just means setting the current going through the tubes, this part requires you go inside the amp where the wiring is and is really dangerous to play around. Also check the vault section a pre-amp tubes for high gain are recommended there.

I have the 50 watt combo which i think uses jus tthe 2 el34 tubes