Members ed_sped2 Posted February 9, 2010 Members Share Posted February 9, 2010 Anyone know? I'm trying to figure out why my silverface Twin keeps blowing fuses, and I want to see if its a problem with the power tubes. Link to comment Share on other sites More sharing options...
Members wiseblood Posted February 9, 2010 Members Share Posted February 9, 2010 Go ahead it will be ok. Link to comment Share on other sites More sharing options...
Members ed_sped2 Posted February 9, 2010 Author Members Share Posted February 9, 2010 I guess the next question is how I isolate the bad tube? Link to comment Share on other sites More sharing options...
Members Sixtonoize Posted February 9, 2010 Members Share Posted February 9, 2010 If you have a bad power tube, you should replace them all. Link to comment Share on other sites More sharing options...
Members ed_sped2 Posted February 9, 2010 Author Members Share Posted February 9, 2010 Oooo....pricey. Link to comment Share on other sites More sharing options...
Members pioneerprogress Posted February 9, 2010 Members Share Posted February 9, 2010 Oooo....pricey. it's like headlights on your car.Sure you'll save the money now, but you'll end up paying more money again very soon anyway.Just replace the set. Link to comment Share on other sites More sharing options...
Members ed_sped2 Posted February 9, 2010 Author Members Share Posted February 9, 2010 So, I power up the amp with no power tubes in, and it doesn't blow a fuse. Problem identified, right? Bad power tube section. Is there a way that I can be sure its the power tubes without blowing a brand new quad of matched 6L6's? Link to comment Share on other sites More sharing options...
Members /pepi\ Posted February 9, 2010 Members Share Posted February 9, 2010 So, I power up the amp with no power tubes in, and it doesn't blow a fuse. Problem identified, right? Bad power tube section. Is there a way that I can be sure its the power tubes without blowing a brand new quad of matched 6L6's? Yes there is ... Take it to a tech. The new tubes need biased and the old tube(s) shorted may have opened up the bias circuit. Price you have to pay for a good tube amp Link to comment Share on other sites More sharing options...
Members ed_sped2 Posted February 9, 2010 Author Members Share Posted February 9, 2010 Yes there is ... Take it to a tech. The new tubes need biased and the old tube(s) shorted may have opened up the bias circuit. Price you have to pay for a good tube amp Would these be things that I could check out on my own with a multimeter? Link to comment Share on other sites More sharing options...
Members Sixtonoize Posted February 9, 2010 Members Share Posted February 9, 2010 Not to be a jerk or anything, but if you could, you wouldn't need to ask. For your own safety, take the amp to a tech. Link to comment Share on other sites More sharing options...
Members knucklefux Posted February 9, 2010 Members Share Posted February 9, 2010 something to keep i mind is that without the power tubes loading the power supply, the B+ voltage can increase substantially. if it happens to exceed the rating of your filter caps, you have to spend more $$$$ to fix it. i'd suggest only power the amp on without tubes for very short periods of time, if at all. Link to comment Share on other sites More sharing options...
Members MRAAJR Posted February 9, 2010 Members Share Posted February 9, 2010 My girlfriends brother did this to my Mark IV without realizing it.....for like 10 minutes....no problem. CSB Link to comment Share on other sites More sharing options...
Members knucklefux Posted February 9, 2010 Members Share Posted February 9, 2010 i'm not saying that it WILL cause a problem, just that it CAN. it varies from amp to amp. Link to comment Share on other sites More sharing options...
Members stringsNstuff Posted February 9, 2010 Members Share Posted February 9, 2010 it will turn into a flying car Link to comment Share on other sites More sharing options...
Members Curtis.Fagan Posted February 9, 2010 Members Share Posted February 9, 2010 it will make women want you, men envy you and children pop like zits should you will it. -Curtis Link to comment Share on other sites More sharing options...
Members Disco Cat Posted February 9, 2010 Members Share Posted February 9, 2010 Not to be a jerk or anything, but if you could, you wouldn't need to ask. For your own safety, take the amp to a tech. So unless you're born with the knowledge, it isn't humanly possible? Don't know about anyone else, but there's been a first time for every thing I've ever done in my life, involving a "learn then apply" process. I remember that people told me on this forum that if I had to ask how to bias my amp, that I should take it to a tech :facepalm: Glad I'm smarter than to take such "don't even try to learn" bits of "advice." They probably all come from amp techs hoping to make money off such people, anyhow. Link to comment Share on other sites More sharing options...
Members 17 Tubes Posted February 9, 2010 Members Share Posted February 9, 2010 So unless you're born with the knowledge, it isn't humanly possible? Don't know about anyone else, but there's been a first time for every thing I've ever done in my life, involving a "learn then apply" process. I remember that people told me on this forum that if I had to ask how to bias my amp, that I should take it to a tech :facepalm: Glad I'm smarter than to take such "don't even try to learn" bits of "advice." They probably all come from amp techs hoping to make money off such people, anyhow. Oh. OH! Link to comment Share on other sites More sharing options...
Members hecticone Posted February 9, 2010 Members Share Posted February 9, 2010 I love people like the op. It makes us lots of money. Link to comment Share on other sites More sharing options...
Members Disco Cat Posted February 9, 2010 Members Share Posted February 9, 2010 Oh. OH! I mean nothing harsh towards Sixtonoize, I just think that asking how to do something is a step towards being able to do it, rather than a sign that they can't. Link to comment Share on other sites More sharing options...
Members mbarn3065 Posted February 9, 2010 Members Share Posted February 9, 2010 it will turn into a flying car [YOUTUBE]IsFfBB2W7IA[/YOUTUBE] Link to comment Share on other sites More sharing options...
Members .homewrecker. Posted February 9, 2010 Members Share Posted February 9, 2010 I mean nothing harsh towards Sixtonoize, I just think that asking how to do something is a step towards being able to do it, rather than a sign that they can't. You're missing the elephant in the room. When he said "For your own safety" some how you read that as "you're too stupid to learn how to do it so don't even bother" when in reality he meant "you could kill yourself best leave it to a pro" Link to comment Share on other sites More sharing options...
Members mbarn3065 Posted February 9, 2010 Members Share Posted February 9, 2010 You're missing the elephant in the room. When he said "For your own safety" some how you read that as "you're too stupid to learn how to do it so don't even bother" when in reality he meant "you could kill yourself best leave it to a pro" This! Link to comment Share on other sites More sharing options...
Members Disco Cat Posted February 10, 2010 Members Share Posted February 10, 2010 You're missing the elephant in the room. When he said "For your own safety" some how you read that as "you're too stupid to learn how to do it so don't even bother" when in reality he meant "you could kill yourself best leave it to a pro" Doesn't change a thing. By the same token, a pro could also kill themselves. You missed the "if you could, you wouldn't need to ask" premise that was the rationale for latter advice. And I was told the same thing about biasing my amp, that if I have to ask then I should take it to a tech for my own safety's sake. Nothing was missed on my part, it's just a :facepalm: thing to say. Link to comment Share on other sites More sharing options...
Members .homewrecker. Posted February 10, 2010 Members Share Posted February 10, 2010 And I was told the same thing about biasing my amp, that if I have to ask then I should take it to a tech for safety. Nothing was missed, it's still a big :facepalm: thing to say. I guess our definition of :facepalm:worthy comments are different then. Link to comment Share on other sites More sharing options...
Members Disco Cat Posted February 10, 2010 Members Share Posted February 10, 2010 Obviously, since you equate a person asking how something's done as an indication of an inability to take proper precaution when doing referred to action -which is anther form of a "you're too stupid to..." implication. As I said, by the same token a pro could kill themselves. As long as the OP knows to let the charge deplete from his amp before poking around, and to not touch things like the underside of caps, there's no reason why he'd be any more at risk than a pro. Link to comment Share on other sites More sharing options...
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