These forums are read only, please use our new forums here.

Main :: DT50/DT25



DT 25 Has anyone changed their own tubes?
by ahrens on 2013-01-31 14:18:36

I've got the dreaded, crackle and pop, and volume drops.  I called tech support and they said check your tubes.  I did and sure enough one of the poweramp tubes sounded out when I tapped it.

Have any of you changed your own tubes without having someone else "bias" them and actually had success? 

Thank you in advance,  Rick



Re: DT 25 Has anyone changed their own tubes?
by spaceatl on 2013-01-31 14:29:05

I always change my own tubes...I have not done my DT25 head yet, but I know it is much easier than the SVs that you have to take the chassis totally out and risk frying yourself...You can get a the test points and the balance pot pretty easily in the head without having to open it...much safer...These things can kill you dead...Not sure if the combo is the same way or not...



Re: DT 25 Has anyone changed their own tubes?
by ahrens on 2013-01-31 15:43:11

Thanks,

Well I went for it.  I went to Guitar Center and bought 2 poweramp and 1 preamp tube(s)- Groove Tubes.  No more crackling, hurray!  The sound is also noticably spongier/chewier, freakin sweet!

I'll keep my fingers crossed that it stays this way for a long time.  I don't plan to have it "biased".  Foolish? Maybe...



Re: DT 25 Has anyone changed their own tubes?
by Krontab on 2013-01-31 15:55:41

What bias values did you set it to? You can have a bit of control of the breakup depending where you set the value in the tolerance range.



Re: DT 25 Has anyone changed their own tubes?
by ahrens on 2013-01-31 15:58:17

I don't know, I simply put new tubes in there...



Re: DT 25 Has anyone changed their own tubes?
by sparkyERTW on 2013-02-01 07:09:58

A description of the biasing process can be found here: http://line6.com/support/message/335828#335828">http://line6.com/support/message/335828#335828">http://line6.com/support/message/335828#335828.

You should probably do it. It should sound better and the tubes will last longer (assuming the bias is actually out).



Re: DT 25 Has anyone changed their own tubes?
by ahrens on 2013-02-01 08:22:24

Maybe I will, it looks like multi meters don't cost too much.




The information above may not be current, and you should direct questions to the current forum or review the manual.