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[Oleh Malyy]

Which capsules was used in Neumann U47 microphone?
In the web are a lot of information that M7 and K47 was used in U47.

But in documents "docu0101_Mictab_E 10-2009.pdf" and "docu0100_Mictab_D 10-2009.pdf" from Neumann we can see, that in U47 was used M7, K49 and M48 capsules.

And K47 in U47FET microphone.

Where is true?

[klaus]

Neumann used two capsules as original equipment in commercially available U47 (tube) microphones:
First the M7, from 1948/9 to ca. late 1959, and thereafter the K47/49. The latter was also used in the U47fet (and is still used in the M149, and M147.) 

The K47 was also used since 1960 as replacement capsule, when a U47 with defective M7 came in to Neumann repair facilities.

The "M48" you mentioned was the KM53 small diaphragm omni capsule installed in the short-lived Philips (U47p) model (ca. 1954 to 1955). It had detachable (bajonet) heads equipped with  M7 or K53 capsules.