Pris er for et parret par/ Price per matched pair!

The EML 300B Mesh is a wonderful and most amazing tube. The use of this tube requires some care, because it is not a Plug&Play replacement for any 300B. However excellent sound quality is possible with this tube.

With all tubes, there is the balance between best sound and highest output power. There is no way to get both out of a tube at the same time, and 300B is no exception.

For this reason, some 300B amplifiers work at a lower output power, to provide more delicate sound for speakers or applications which do not need output power in the first place. These can be horn speakers, head phones, pre amplifiers, or driver tubes. Some extreme amplifiers produce simply highest possible output power for speakers with low efficiency, up to a level where also tube life gets compromised.

Most normal amplifiers are somewhere in between, and each type has it's own justification. We just need to understand what that justification is.

So We really need to look at how the amplifier design is presented. When we have a 'muscle' type of 300B amplifier, claiming to get so and so many Watt out of a standard 300B tube, it is obvious, what the design compromise here was: High power at the cost of best sound.

Data Sheet

The 300B-Mesh can replace a standard 300B-Mesh in several cases, but not in all cases. So please read this data sheet carefully.

It is nor always possible, simply plug & play a 300B-Mesh into a 300B amplifier. If not checked with care, overheated anodes may result, and such a damage is not covered by the guarantee.

The 300B-Mesh can replace a normal 300B tube, if the following conditions are met:

1. Bias and Anode dissipation must be reduced to typical 22 Watt, or to absolute maximum of 28 Watt. (see below table)
2. Filament current of minimum 1.4 Ampere must able to supply by the amplifier. This is very important. Otherwise, heater voltage will drop below 5V, and the tubes may fail.
3. The larger length of the tube glass is no problem. (like with closed amplifiers).

The 300B-Mesh is a 'long Anode' version,. The Anodes are 25% longer as with normal 300B-Mesh we build. The physical size of this tube, inside and outside is the same as the larger 300B-XLS tubes we make, so it is larger than you may expect from a 300B. Check the dimensions at the end of this Data sheet.

The heat dissipation of the wire mesh is lower than for Solid Plate anodes. So the maximum Anode dissipation of the 300B-Mesh for continuous use must be limited to typical 22Watt, or absolutely maximum 28Watt. This is however a classical use condition in several Japanese products. Though many other amplifiers exceed this number, so it is important to check with your amplifier manufacturer first, if you are not sure about the Anode dissipation.

Læs mere HER