thewoodbutcher Posted November 12, 2013 Share Posted November 12, 2013 Hi all i own a dream rig pod hd500 dt25 head 4x12 cab and jt variax my concern is what to do if and when the valves/tubes need replacing , hope this never happens at a gig !!!! and it fails how do i replace them never had a valve amp before always used solid state whats biasing etc and should it be done by line 6 service centre etc , but what happens if they fail during a gig ? please help thanks Quote Link to comment Share on other sites More sharing options...
Brazzy Posted November 12, 2013 Share Posted November 12, 2013 Check this out by TheRealZap>>> http://line6.com/support/topic/3327-dt-50-25-tube-biasing-tips/ I just recently asked this question>>>http://line6.com/support/topic/3750-can-a-blown-power-tube-or-tubes-cause-damage-to-my-dt50-head/ Quote Link to comment Share on other sites More sharing options...
ozbadman Posted November 12, 2013 Share Posted November 12, 2013 This has some useful official stuff too: http://line6.com/support/page/kb/_/amplifiers/dt50dt25/dt50dt25-faq-r144 Quote Link to comment Share on other sites More sharing options...
MartinDorr Posted November 13, 2013 Share Posted November 13, 2013 Get a matched set of power tubes for your DT25. Plug them in at home or practice room and check how bad they sound if not biased (it probably won't be bad). Replace them with the original ones you had and store your replacement set in a save box for when you need them and don't worry anymore. Once you really need them get them biased or do it yourselves after you get homw/back from your gig. Quote Link to comment Share on other sites More sharing options...
stumblinman Posted November 14, 2013 Share Posted November 14, 2013 Buy a matched quartet, install one pair and bias. Take the other pair and keep them with you at gigs so you can swap without hassle should a problem arise. Keep your original tubes as emergency backups to your backups. 2 Quote Link to comment Share on other sites More sharing options...
Brazzy Posted November 14, 2013 Share Posted November 14, 2013 That sounds like "SOUND" advice Stumblinman. Thanks Quote Link to comment Share on other sites More sharing options...
MartinDorr Posted November 14, 2013 Share Posted November 14, 2013 Buy a matched quartet, install one pair and bias. Take the other pair and keep them with you at gigs so you can swap without hassle should a problem arise. Keep your original tubes as emergency backups to your backups. Nice improvement to my simple approach ;-). Will keep that in mind Quote Link to comment Share on other sites More sharing options...
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