Members guitar_dude45 Posted July 14, 2009 Members Share Posted July 14, 2009 Hi: I'm about to buy new tubes for my laney, and might need a rebias....the thing is i don't know how to do it. I know where the internal bias pot is...but don't know what/how to mesure and what things should be done. (I don't want to spend 200 on a bias rite) I know how to discharge caps. Thanks! sorry for the noobness Link to comment Share on other sites More sharing options...
Members chakosh Posted July 14, 2009 Members Share Posted July 14, 2009 Well, the reason that the Bias Rite's are the price they are is because you really need something like that to bias it unless your Laney has some sort of test point somewhere. Did you look up schematics? If I were you, I'd take it to a tech if you're not sure what you're doing. The last thing you want to do is do something bass-ackwards and fry your amp. Link to comment Share on other sites More sharing options...
Members guitar_dude45 Posted July 14, 2009 Author Members Share Posted July 14, 2009 there are no bias test points in my amp. The thing is NO ONE in PR works on biasing amps. Link to comment Share on other sites More sharing options...
Members guitar_dude45 Posted July 15, 2009 Author Members Share Posted July 15, 2009 bump Link to comment Share on other sites More sharing options...
Members BluesMan60 Posted July 15, 2009 Members Share Posted July 15, 2009 Get a bias probe. It's well worth the one time cost. Bias Rite, Bias King, Compu Bias are all units you can use. Probing for the points internally can be dangerous to you, the amp, and your meter. Mike K KCA NOS Tubes www.kcanostubes.com Link to comment Share on other sites More sharing options...
Members wixedmords Posted July 15, 2009 Members Share Posted July 15, 2009 Your going to need to bias the GH100L GD, with any tube change. There is such a variance in tubes that even if changed to the exact same power tube model, a bias will be needed. PM incoming. Link to comment Share on other sites More sharing options...
Members marauder6666 Posted July 15, 2009 Members Share Posted July 15, 2009 This may help http://www.laney-posse.co.uk/theposse/viewtopic.php?f=5&t=98 Don't kill yourself! Link to comment Share on other sites More sharing options...
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