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In the Forum: Audio Discussions
In the Thread: About the life-expectancy of the new production tubes.
Post Subject: Tube vibration soundPosted by drdna on: 2/10/2009
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 Romy the Cat wrote:
The contemporary productions DHT tubes (Russian of Chinese) are superbly firm and have no internal noise when they shacked or hit. The mintage 60 years old tubes what you make the “close to ears” test responses like as somebody threw a bicycle from a roof of Empire State Building to the ground. However, the vintage tubes are not necessary all that rattling project to sound? So, since you have a long experience to correlate the shakable and auditable then I hope you will explore it further.
I have only tested the tubes I have tried. I do not begin to imagine it is only about tube vibration, but I have noticed a pattern in properly functioning, well made tubes. It is NOT that better tubes have no vibration. Instead, the tubes that sound best to me seem to have a sort of springy sound, like the sound of a water drop or the sound of the tabla drum being struck. In any case, the tubes seem to have a specific sound when tapped, which I think reflects HOW the internal structure responds to introduced vibrations.

We will see how the NOS Sylvania 2A3 is when it arrives.

Adrian

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