[Mr.T]

"Iain Churches" wrote in message
ti.fi...
The Neumann M47, M49 and M50 tube mics are still used by major
classical recording companies. Many of those that were converted to
FET in the 1970s have been converted back again.

But I can't think of one measurement mic that uses tubes.
Have you ever considered accuracy is not always what the sound engineer is
after?

MrT.