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GrahamGunn

Resonance From Dt25 Valves

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For all options I-IV on my DT25 there is a resonance with any C# note on the guitar. (It's not the guitar, or the player!)

Any ideas?

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Is this a plate rattle? maybe...If so, you might can verify it better with a pencil...tap each tube with a pencil, if you hear it...you have some microphonics and you need new tubes...if the amp is less than 90 days, I think Line 6 has a 90 day warranty on the tubes...

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I am getting a similar problem with my spider valve when I play a B maj chord. I hit the chord, then mute the guitar and a resonance note at 192Hz just sings out and wont go away until I turn the standby off. Very annoying as I start in a new band next week.

 

I can send a sound file if need be.

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The amp had (Russian) Electro Harmonix EL84 valves that needed to be replaced. In the end I replaced them with ones from Watford valves. Much better.

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Also, spaceatl, the pencil test worked much better when the amp was on!

However it then sent the whole amp microphonic. Still, as I said, much better now.

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