Helge Lund Posted June 11, 2003 Share Posted June 11, 2003 I've got an Eden Metro with a tube in one of the preamps. How often should this tube be replaced? And how do I know it's time to do this? Could I use any 12ax7 tubes, or should I order factory's own? Is there a big difference in tubes of one type (12ax7)? Many Q's, but I hope I can get some A's for some of them.....! Helge Link to comment Share on other sites More sharing options...
PJR Posted June 11, 2003 Share Posted June 11, 2003 Originally posted by Helge Lund: I've got an Eden Metro with a tube in one of the preamps. How often should this tube be replaced? Most single tube preamps go fairly easy on the tube......it should last 1-3 yrs depending on usage. And how do I know it's time to do this? It will sound bad. Sometimes in extreme cases- glassy, almost phasy sounding. Could I use any 12ax7 tubes, or should I order factory's own? Should be able to use any 12ax7. There are good number of choices out there though.....ranging from a few $$ to $100 plus. Is there a big difference in tubes of one type (12ax7)? I believe so. YMMV Many Q's, but I hope I can get some A's for some of them.....! Helge I've gotten my tubes from Here One Bassist's opinion . PJR 5CentMary Link to comment Share on other sites More sharing options...
alexclaber Posted June 11, 2003 Share Posted June 11, 2003 I'm still trying to decide what tube to put in my SWR Grand Prix - the original tube in there is definitely past its best. I've found quite a lot of info on the web recommending good tubes for this preamp, particularly 5751 tubes but they're all NOS and I've yet to find anyone that stocks them. Has anyone got any recommendations for tubes for this preamp design that are still available? Pete, what have you got in your SWR head? Alex Barefaced Ltd - ultra lightweight, high ouput, toneful bass cabs Link to comment Share on other sites More sharing options...
Tom Capasso Posted June 11, 2003 Share Posted June 11, 2003 Helge, I'm not a tube person. Here is another thread where we talked about tubes. It's not exactly an answer to your questions, but may have some other insight. And it includes luthier Jack Read's funny bit on how to tell when a tube is bad. Tom www.stoneflyrocks.com Acoustic Color Be practical as well as generous in your ideals. Keep your eyes on the stars and keep your feet on the ground. - Theodore Roosevelt Link to comment Share on other sites More sharing options...
PJR Posted June 11, 2003 Share Posted June 11, 2003 Originally posted by C.Alexander Claber: ....Pete, what have you got in your SWR head? AlexMy SWR Mo Bass came stock with a Groove Tubes 12ax7. I snatched that baby outta there quicker than a weasel snatching eggs in a hen house, and put in a Telefunken ECC83. But alas, I see they are very hard to come by nowadays. The Telefunken added much warmth and depth to the Mo...vs the stock tube. Well worth the $110 bucks IMO. PJR 5CentMary Link to comment Share on other sites More sharing options...
Helge Lund Posted June 11, 2003 Author Share Posted June 11, 2003 Thank's for all the A's...! Helge http://www.balanz.no/bassist.jpg Link to comment Share on other sites More sharing options...
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