Siemens / EF804S-SIEMENS

EF804S-SIEMENS Click on image(s) above to view larger

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Siemens are a huge German owned manufacturer that has made and developed some of the worlds best vacuum tubes. Siemens first patented the x-ray tube On March 24, 1896. Siemens have made some of the best sounding audio valves that have become highly sought after for their sound and build quality.
The Siemens EF804S was made by Telefunken and was a selected for use in high end electronics and studio equipment. The S designation meant factory selected for the best possible S/N ratio with low microphonics for exacting applications with a 10,000 hour life expectancy.

The German Telefunken company was the only company that made the EF804S.These items are made and selected by Telefunken and are branded Siemens. These have Telefunken diamond mark on the base. Specially made for the professional recording industry where it was used in microphones and microphone preamps such as the V72. These come in the original Siemens boxes and are a very high quality item.



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