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Post subject: Tube Rattle
Posted: Fri Apr 23, 2010 9:21 pm
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Hobbyist
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Joined: Sat May 02, 2009 11:45 pm
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I just put in all new tubes in my Fender HRD. However, I do get some rattle from the tubes when certain notes are hit, not all the time. Overall the amp sounds great for home practice. Is my amp ok?? Or is this just Normal?? By the way.. the amp is from '98 so I dont have the foam pieces the new ones have around the tubes. What can I use?


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Posted: Sat Apr 24, 2010 5:51 am
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Roadie
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Joined: Sat Mar 21, 2009 8:02 am
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go to your local auto parts store and get some "o" rings for each size tube and with the amp off and cool slide them around the tubes. one per pre amp tube and maybe two for the power tubes, be sure they fit snug. most of the rattle is from pre amp tubes but some power tubes have a tendency to rattle too. the auto parts store sells o-rings that can take a large amount of heat, more than what a tube can produce and it WILL NOT HURT THE TUBE unless you break it your self. good luck.


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Posted: Sat Apr 24, 2010 9:07 am
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Joined: Fri Jan 02, 2009 3:17 pm
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Had a similar problem withmy blues deluxe and pulled the foam down to the center of the tubes.Problem solved.


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Posted: Sat Apr 24, 2010 12:42 pm
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Rock Star
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Don't get plain old rubber "O" rings. They will either melt, rot or both. They need to be high temperature silicone rated to at least 400 degrees.
Use something like these

http://cgi.ebay.com/8-VACUUM-TUBE-AMP-D ... 563b1fa345

I used a pair from Herbie's Audio. hey were a bit different and a lot more expensive. The Ebay rings will be fine. They have a lot of them. Just search Tube Dampers.


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