Alle mesh kommer da vel ikke fra samme fabrikk. Disse kina-rørene er jo ikke ekte mesh engang slik som f.eks Emission labs er.
Fra deres side:
300B Mesh
Here is something nice we want to report about. It is the new 300B-Mesh, and we have it ready for shipment by Mid December 2007. This tube is a real woven wire mesh tube. Please take good note that Emission Labs is the only company building mesh tubes that are indeed Mesh tubes. The Chinese companies produce lies about this! They offer fake mesh tubes, that are no mesh tubes at all. When you look at them under the microscope, you quickly discover the fraud. You will see they use simply solid plate tubes with tiny holes punched into it, and tell to you these are mesh tubes. These fake Chinese mesh tubes provide you only the nice optics of a mesh tube, but again they not mesh tubes at all.
The EML 300B Mesh is a long plate version, it's plates are 25% longer than normal 300B. Like this we could increase the plate dissipation up to a point which is useful for SE amplifiers. So the EML 300B Mesh has 28 Watt continuous dissipation, and has a peak power of 35...40 Watt. Since a true high end 300B design runs the tube at 22...28 Watt anyway, and not at 36 Watt, the EML300B Mesh sure has it's applications. It is only at this level, that any 300B tube develops the sweet sound characterized by this operating point. Consequently at this operating point the 300B Mesh will add the maximum of what it has to offer.
On the other hand, when you have a 300B amplifier on steroids, like the kind that proudly gets "so an so many" Watts out of a normal 300B, then the poor tube is likely to be biased at 35...38 Watt. Still there is the never changing rule with tube amplifier design, that highest output power, and finest sound do not combine well. So with a "muscle" amplifier, the sound quality is not optimized, but the output power is. For this, the 300B Mesh is not intended. This kind of amplifier will benefit most from a tube like 300B-XLS, because the 300B-XLS doesn't have to work very hard at a plate dissipation of 35...38Watt. (since 50Watt is even a piece of cake for the 300B-XLS). This brings the design back to basics, where it says that a tube sounds best when biased slightly above medium plate dissipation, and not close to maximum plate dissipation.
:
