If you toob guys would stop with all the "rolling" you wouldn't have these problems. Perhaps SS is the way for you to go...
RW's response is not helpful. Many of us roll tubes with tube pre's and enjoy the variety without incident, and obtain the benefits of a tube pre over SS.
Is there a US rep or dealer for Dared in US you can contact? Email dared in China? Don't give up just yet. I am no expert, but how can fuses be hardwired? How would you replace a blown one?
If RL was trying to be funny, my apologies :o) But I was really frustrated and looking for real help and did not read that as very funny. I do not know what happened for sure.
Here was the scenario...I got home with some tubes I got from a friend, and before I turned on the pre (obviously)
I pulled one 12AX7 to start, and upon firing up the pre, it
made the big loud noise out of the right speaker and it went away and left only he left speaker playing,right side totally dead. I turned it off and put the stock tube back in and turned it on and still...right side totally dead. In a fast panic, I turned every thing off and plugged every thing back into my Emotiva XDA which can be used as a preamp also, and everything was fine. WHEW!!! Anyway, I thought the pre either blew a fuse and did not think it was a tube issue since the stock one did not make a difference either. So I was bummed of coarse and posted my post.
About 4-5 hours later, I decided I would hook it all back up and try the left side tube (which is an AT7 tube) just to see if for some reason it controlled the right ch, and "it" had gone south. But when I turned it back on, everything was fine like nothing had happened??? Been sounding great from that moment on last night and all through the day today. No issues, not problems and sounding fantastic. I put in another AT7 tube and been enjoying it.
So, bottom line is, I think the AX7 tube was bad (lost it's vacuum??) and not sure it makes sense, but something in the pre "reset" itself??? A protection circuit??
Again, to RLwainright...I'm sorry if I read your reply wrong. Long week. :o)