I need help with tubes.

bigarm

Member
Messages
122
I took the chassis out of my Ceriatone OTS mini to put a piece of copper on the bottom as a shield. I took the tubes out first to make sure I didn't break one but when replacing noticed the very top of the tube was broken off. It is a Ruby 12AX7ACZ HG. There are 3 of them in the amp. This was the one in the middle. Do I need to replace all 3 at the same time? I only want to order once. Also, do you have recommendations on places to order from that will deliver quickly? Thanks
 

Roccorobb

Member
Messages
1,666
You can order just one preamp tube. Power tubes should be replaced together at the same time.
 

hogy

Silver Supporting Member
Messages
14,962
The tube might not even be bad. That nipple is where they melt the glass shut after they draw a vacuum. You could loose some of it without causing an issue. Sometimes. Sometimes not.

Typically, a tube that has lost its vacuum will turn a hazy white inside. If you don't see that, I'd go ahead and simply try the tube. You're not likely to do damage to the amp even if it is bad.
 




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