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Homemade amp...why not? (contains cheating)
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@scot Nice one! I think I saw that model just recently. Driver was a lady with old school helmet and glasses.
Anyway I had a little bit problem with tube rattle. I fixed that by screw between tube and chassis. But that's not "clean solution". Would new tube help? And with brand of power tube is the best?
Today I made just small feature. Cover to transformer. Is that safe? It's open from both sides.
There are "tube dampers" that can help somewhat with mechanic rattle. Like this one
Or the the tube/s could be bad. Can you try a different guitar cabinet? So you can rule out if it's something going on with your cabinet or it's the tube/s and amp itself. Next thing you can do is turn on the amp and use a pencil, the side with eraser to lightly tap on the tube and see if one in particular makes a bad rattle. If you find one, replace it.
@Buco I'm pretty sure that it's power tube or it's socket. When I hold it down rattle stops. Screw between chassis and tube helps. It's net ideal but it works. I will mabye try buy a new tube. Can I just swap that or is there necessary set up amp for it? Thanks for help!
If it's preamp tube, you can just replace it. If power tube, the amp should be biased with the new tube. Or maybe your amp is self-biasing design. Can you ask the people you bought the amp from?