Leftbass Posted October 19, 2009 Share Posted October 19, 2009 Is it possible to tell when the pre amp valve is on its way out? What are the signs? Audible or visual Quote Link to comment Share on other sites More sharing options...
umph Posted October 20, 2009 Share Posted October 20, 2009 [quote name='Leftbass' post='630309' date='Oct 19 2009, 01:08 PM']Is it possible to tell when the pre amp valve is on its way out? What are the signs? Audible or visual[/quote] if it starts to squeel when you tap it or flashes, then thats a sign its on its way out. pre amp valves can last a very long time, i've got some in my beck amp that've been going near on 60 years! Quote Link to comment Share on other sites More sharing options...
skankdelvar Posted October 21, 2009 Share Posted October 21, 2009 (edited) If you even [i]suspect[/i] it's on the way out, go buy a new one. We're only talking a tenner or so for a decent 12AX7. Depending what it's function is in your amp, you can also take the opportunity to try one with different characteristics. Edited October 21, 2009 by skankdelvar Quote Link to comment Share on other sites More sharing options...
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