Eurotubes “EuroDamper” Tube Damper Rings for Octal Base Power and Rectifier Tubes. One Pair.

Helps with any microphonics

I had a horrible experience with power tube rattle in the past on a Deluxe Reverb Reissue. Nothing would make that tube rattle stop, and I'm convinced it was mostly due to the DRRI construction. Fast forward to now, and I have a Mesa TC-50 combo that was getting some slight rattling on a d only. It wasn't horrible, but it was mildly annoying. I ordered these, and they fit perfectly. No more tube rattle no matter how loud I play or how high I turn up the bass EQ. This may or may not fix your problem, but it fixed mine.

They do the job. Bought for a Fender that rattled off bad. They just helped position the tube to have contact with the pad, and pad to the cage around tubes. In a Fender Custom Pro Reverb, this fixed that issue. That particular amp is a newer small 40w 6L6, and a light Creamback speaker. But man can it rattle off some tubes. If that doesn’t solve your issues, then look at tubes or on most new Fender Custom and Reissue the power tube socket holders are responsible. Fender is very cheap and it’s a know issue with the Princeton and some models to get ghost notes and tube rattle at low level vibrations. These only help if you try them first, but is more a bandaid. I’d use these more for gig travel safety on power tubes, and shipping amps. Probably the most practical usage.

Damper rings were easy to install and stopped tube rattle.

They don't fit any size tube. Too smally for KT77 and way too small for KT66. Then, on an ironic note, they are too big for most EL-34's in that they barley grip the tube. Once the tube heats up, they slide all the way down. Like I said, useless. They aren't worth my gas to take them back to the shipping drop-off.

these are the best of all the different variations I have tried and most did absolutely nothing. I did find they worked best in a different position on the tube than recommended (best on center, not over the mica), so move them up or down until you get the least noise - you will know when you hit the spot! These allowed output tubes that had a rattle so bad that could not be used in combo amps, but with these work great without the noise. I have now used on a few amps all solved the problem. Again the only device that has worked so I can see why others say tube dampers do not work - well they have not used these IMHO.

I can't really recommend this product or say you shouldn't try it. I have a boutique tube amplifier that was producing a lot of rattle with the tubes, even on low volume. It was especially bad when I played the key of B, I noticed, anywhere on the guitar. So, I gave these a go, despite the naysayers who scoff at the idea of putting a rubber ring on tubes. I was desperate, and it was cheap enough to try. When I put them on, I was really happy, and surprised honestly because I was prepared for them not to work. I played around in the key of B and most of the rattle was gone...but then I realized that now the key of A produced the dreaded rattle. Sigh. So, I purchased a new pair of tubes, and that did the trick. They still rattle some, but WAY less than they did before. All of that to say that I guess these are worth a try if you're having a rattle issue, but if you can afford to swap out the rattling tubes for a new pair, that's probably your best bet. I can't say anything about whether these rings help with microphonics, as that's not what I was experiencing with my rig.

I got these for my Fender Bassman 59 reissue. I was noticing a lot of rattle from the 6L6 tubes and I searched for remedies for it and found this item. Well worth it. It works. This amp is really loud and can have the house rattling but the 6L6 tubes are silent. They have great customer service. I asked about putting them on and they gave me a great tip. You have to stretch the band out before ton work it on the end of the tube. But once they are on you can slide them really easy up and down the glass tube.