Guest lime ruined my life Posted June 20, 2005 Report Share Posted June 20, 2005 how much, and where do people reccomend? X-( Link to comment Share on other sites More sharing options...
sonhenry Posted June 21, 2005 Report Share Posted June 21, 2005 depends on what's wrong with it. what kind of amp is it and are the symptoms? Link to comment Share on other sites More sharing options...
Guest lime ruined my life Posted June 21, 2005 Report Share Posted June 21, 2005 fuse blew, and i think at least one power valve blew too.maybe everything fried. i don't know. Link to comment Share on other sites More sharing options...
craig deadenstereo Posted June 21, 2005 Report Share Posted June 21, 2005 Just order a new pair or quad of valves (important top get them matched, valve amps work with valves in pairs) and buy a new fuse or two and stick 'em in. it's real easy, and your amp will work again. If it is still fucked after that, then take it to a tech. Link to comment Share on other sites More sharing options...
sonhenry Posted June 21, 2005 Report Share Posted June 21, 2005 yeah, get some new tubes. but do this first, before you try the new tubes.1. Take ALL the tubes out.2. Put in a good fuse3. Power it up.If the fuse blows take it to get repaired- you've blown your power tranny or some of the parts in the power supply and the voltages are running away. If it doesn't blow the fuse then try it with new tubes.Oh, don't try this with a valve state or hybrid solid-state amp. It's got to have pre-amp and power amp tubes. Link to comment Share on other sites More sharing options...
David Posted June 21, 2005 Report Share Posted June 21, 2005 if a fuse blows, i wouldnt worry straight away, first replace it with a new fuse (make sure its the same ratings) if it works then cool, fuses blow sometimes, if it blows again take it to a techDavid Link to comment Share on other sites More sharing options...
Guest DustyDeviada Posted June 22, 2005 Report Share Posted June 22, 2005 Be careful if you don't know what you are doing, they can be quite dangerous. Link to comment Share on other sites More sharing options...
sonhenry Posted June 22, 2005 Report Share Posted June 22, 2005 if a fuse blows' date=' i wouldnt worry straight away, first replace it with a new fuse (make sure its the same ratings) if it works then cool, fuses blow sometimes, if it blows again take it to a techDavid[/quote']Normally I'd agree, but he's also got a power valve that's fried too. So, one of several things has gone wrong. Here's at least 3:1. The tube is bad. No problem, a new fuse and a new tube and you're all set.2. The power transformer is bad. 3. One of the resistors that stablize the valve is old and blown.Before you risk a valve and a couple of fuses, pull all the valves and put in a new fuse. If it runs off standby without popping that fuse, all you need is a valve. If it's #2 or #3 you're going to eat the replacement valve. Save the money.BTW, an amp doesn't blow a fuse because the fuse was bad. The fuse blows because it's seeing too much current. The problem is why. If you're uncomfortable taking advice like this off a forum check out Gerald Weber's 'Desktop Reference to Hip Vintage Amps' or Aspen Pitmans 'Tube Amp Book'. Either one can walk you through some basic troubleshooting. They're great references and may save you an un-needed trip to a tech. You don't need to be an electrician to read them either. Link to comment Share on other sites More sharing options...
Guest lime ruined my life Posted June 24, 2005 Report Share Posted June 24, 2005 it doesnt have a "standby" switch. it blew because i had all 3 gains turned to 10. Link to comment Share on other sites More sharing options...
sonhenry Posted June 24, 2005 Report Share Posted June 24, 2005 it shouldn't do that......probably a tube, er, valve. valve, probably a valve3 gains and no standyby? what kind of amp is this? . Link to comment Share on other sites More sharing options...
Guest lime ruined my life Posted June 25, 2005 Report Share Posted June 25, 2005 burman 501. Link to comment Share on other sites More sharing options...
Pudenfuhrer Posted September 9, 2008 Report Share Posted September 9, 2008 Biased InformationHey -You should have started to hear a few less pleasant sounds from your amp if the valves were getting tired -However it may well still be power tube going popDepending on the type of valve amplifier however it may not be of the modern self biasing type - (that is an automatic circuit). Usually you have to use a screwdriver on a pot or two and a meter setup on 350-450 Volt rails - something that it's worth paying a tech to do. The purpose in this is that we want the two or four matched valves to draw together equally and within their operating limits. Anyone who has a Class A type amp does not use this matched pairing of amplifier valves (push-pull/ back to back) operation and this becomes less of an issueThe joy of valve amps is the ability to rebias most of them to take heaps of different valves based around the same pinout.http://www.watfordvalves.com/pdfs/guitaristv02-01_biasing.pdfA nice starter for people not sure what to expect from valves -Marshall Amps :: The Secret Life Of Valves Link to comment Share on other sites More sharing options...
GraemeC Posted September 9, 2008 Report Share Posted September 9, 2008 I suspect this problem was solved long ago as the post was in June 2005!!! Link to comment Share on other sites More sharing options...
neepheid Posted September 9, 2008 Report Share Posted September 9, 2008 This place is one of the worst I've seen for thread resurrection. Link to comment Share on other sites More sharing options...
unbroken Posted September 9, 2008 Report Share Posted September 9, 2008 close thread please. Link to comment Share on other sites More sharing options...
GraemeC Posted September 9, 2008 Report Share Posted September 9, 2008 This place is one of the worst I've seen for thread resurrection.Yes and then people keep posting to it pointlesly...o_O Link to comment Share on other sites More sharing options...
Lemonade Posted September 9, 2008 Report Share Posted September 9, 2008 Link to comment Share on other sites More sharing options...
GraemeC Posted September 9, 2008 Report Share Posted September 9, 2008 close thread please.why...?? Link to comment Share on other sites More sharing options...
Chris Posted September 9, 2008 Report Share Posted September 9, 2008 This place is one of the worst I've seen for thread resurrection.It has been this week, dunno why.I think considering the person who posted the initial query doesn't even post here anymore probably means the thread has served it's purpose. Link to comment Share on other sites More sharing options...
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