Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: tubesornothing on March 06, 2011, 06:18:38 pm
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I have been stocking my 18watters with JJ EL84s. I like the sound, they can handle a little higher voltage and they are reliable.
However, an amp came back the other day because of this tinkling sound when playing at bedroom volumes. After a lot of work and swapping tubes I tracked it down to ALL of my JJ el84 tubes. It really shows up when playing the 4/5 string past the 12th fret.
Anyone else ever notice this?
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I havn't noticed that but I have noticed that about 50% of the JJ's I have bought over the past year have been bad .
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I have noticed that at least once with the JJ EL84 tubes.
It came up with a certain note only.
/Leevi
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Are you using these tubes in a combo or head? Combo's create all sorts of problems due to vibrations.
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However, an amp came back the other day because of this tinkling sound when playing at bedroom volumes. After a lot of work and swapping tubes I tracked it down to ALL of my JJ el84 tubes. It really shows up when playing the 4/5 string past the 12th fret.
Anyone else ever notice this?
Can you describe this "tinkling sound" a little more in detail please?
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Are you using these tubes in a combo or head? Combo's create all sorts of problems due to vibrations.
I agree. I struggled with this myself. Take the head out of the cab and see if you still hear it. Although usally it's more pronounced when the amp is louder.