My name is Gunter Wagner and I am specialised in tube microphone technology since more than 40 years...
The more I learned about tube microphones in the following years, the more I respected the U47 design...
Considering that it was designed 1948/49, shortly after WW2 - at a time when it was hard to find sources for unusual parts and materials in Germany - its historical impact on the recording industry from the early 50's until today is undisputed and truly remarkable.