pwik Posted March 5, 2016 Share Posted March 5, 2016 My DT25 head is making a popping noise. It just started happening. It takes a couple minutes after turning it on but does it whether I am playing or not. Also can hear it when the volume is turned down. The head is about 18 months old and used regularly for band practice. Any ideas? Tubes maybe? Thanks! Quote Link to comment Share on other sites More sharing options...
pwik Posted March 5, 2016 Author Share Posted March 5, 2016 Well I pulled the tubes out of my DT25 combo and put them in the head (and the head tubes in the combo). No popping with the head anymore but the combo started so I guess it's the tubes. :) Quote Link to comment Share on other sites More sharing options...
DarrellM5 Posted March 5, 2016 Share Posted March 5, 2016 Yep, popping noises that begin once the tubes warm up a little is a pretty good sign that they're on their way out or not seated very well. Cool that you had another DT to experiment with. Quote Link to comment Share on other sites More sharing options...
spaceatl Posted March 9, 2016 Share Posted March 9, 2016 The tube pins can become oxidized and you can get some "bug zapper" sounds in the back ground. pull the tubes, clean the pins and the sockets and re-insert them...Just make sure that you do it when the amp is unplugged from AC and you note the sockets the power tubes came from so the bias adjustment stays in check. Quote Link to comment Share on other sites More sharing options...
psarkissian Posted March 9, 2016 Share Posted March 9, 2016 Make sure the tubes get properly biased. Quote Link to comment Share on other sites More sharing options...
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