Aalin Posted January 1, 2018 Share Posted January 1, 2018 Hello I was wondering what could be the lifespan of the tube of the préamp Taka TB10. As, if the tube blow, there is no more sound coming out from the bass, to avoid this problem I was wondering if I buy and carry a spare one in my bag. I think that the original tube is: Electro Harmonix 12AU7 EH. Thank's for your answers Alain Quote Link to comment Share on other sites More sharing options...
Treb Posted January 2, 2018 Share Posted January 2, 2018 Replace if the mirror silver top inside the tube shows discoloration or turns milky white (vacuum compromised). it produces high pitched ringing sounds when tapped (gone microphonic). it has been used 10,000+ hours (end of life) Quote Link to comment Share on other sites More sharing options...
Aalin Posted January 8, 2018 Author Share Posted January 8, 2018 Thank's Treb for your answer Quote Link to comment Share on other sites More sharing options...
chris_b Posted January 8, 2018 Share Posted January 8, 2018 Change the valves if they are faulty or adversely affecting your sound. Power amp valves wear out, pre amp valves usually don't. Quote Link to comment Share on other sites More sharing options...
Maude Posted January 8, 2018 Share Posted January 8, 2018 I'm only guessing but I reckon a spare one kicking about in your gear bag would be knackered before the one safely tucked up inside the bass goes duff. Quote Link to comment Share on other sites More sharing options...
Hellzero Posted January 8, 2018 Share Posted January 8, 2018 N'importe quelle 12AU7 fera l'affaire, mais tu auras revendu ou échangé ton instrument avant que cette lampe ne soit en fin de vie... Quote Link to comment Share on other sites More sharing options...
Aalin Posted December 13, 2019 Author Share Posted December 13, 2019 (edited) To return to the subject and in case of breakdown of the tube, although this breakdown is very rare, it is always possible to change on the preamp the input of the pickup bridge to put it in the aux input., the socket next to the bridge pickup. That way, you bypass the tube, (and equalize if I can remember), and the sound is coming out of the bass. You can play. Edited December 14, 2019 by Aalin Quote Link to comment Share on other sites More sharing options...
Hellzero Posted December 13, 2019 Share Posted December 13, 2019 That's called a fast answer, urm, almost a year later. 🤣 1 Quote Link to comment Share on other sites More sharing options...
Aalin Posted December 14, 2019 Author Share Posted December 14, 2019 Well Hellzero, it's just an advice. If that can help. 😀 1 Quote Link to comment Share on other sites More sharing options...
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