budget bassist Posted February 5, 2011 Share Posted February 5, 2011 (edited) I know it's not a bass amp, but I thought you tech-heads might know. I bought a little 20W ashdown valve combo used from a local music shop a couple of months ago, and today it's started making a little rattling sound when playing, or if i tap the amp lightly... It's pretty irritating, and it's coming out in recordings as well. It only makes the sound when the amp is on, not on standby or when it's off. Any ideas? I thought it might be a loose valve or something, but seeing as it doesn't happen when it's off, it may not be? EDIT: sorry i just realised this should probably be in technical issues, feel free to move it, mods. Edited February 5, 2011 by budget bassist Quote Link to comment Share on other sites More sharing options...
GarethFlatlands Posted February 5, 2011 Share Posted February 5, 2011 Loose spring reverb unit? Quote Link to comment Share on other sites More sharing options...
budget bassist Posted February 5, 2011 Author Share Posted February 5, 2011 (edited) Hmm possibly, i'm not entirely sure if it's spring reverb or not EDIT: yeah i think it is Edited February 5, 2011 by budget bassist Quote Link to comment Share on other sites More sharing options...
RAY AGAINST THE MACHINE Posted February 5, 2011 Share Posted February 5, 2011 It is a guitar your using? If not, you could've blown it . Quote Link to comment Share on other sites More sharing options...
budget bassist Posted February 5, 2011 Author Share Posted February 5, 2011 yes it is a guitar Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted February 5, 2011 Share Posted February 5, 2011 Microphonic valve. Tap them with a chopstick when it is on. Is most noticeable if it is one early in the signal path, as there is more gain afterward, so if you have no spares, can do some swapping to lessen the problem. Quote Link to comment Share on other sites More sharing options...
budget bassist Posted February 5, 2011 Author Share Posted February 5, 2011 [quote name='Mr. Foxen' post='1117142' date='Feb 5 2011, 10:25 PM']Microphonic valve. Tap them with a chopstick when it is on. Is most noticeable if it is one early in the signal path, as there is more gain afterward, so if you have no spares, can do some swapping to lessen the problem.[/quote] cheers, i'll give that a try Quote Link to comment Share on other sites More sharing options...
GarethFlatlands Posted February 5, 2011 Share Posted February 5, 2011 Tap all your valves with a glass hammer. If they smash, they're a witch. Quote Link to comment Share on other sites More sharing options...
budget bassist Posted February 5, 2011 Author Share Posted February 5, 2011 Quote Link to comment Share on other sites More sharing options...
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