KrIVIUM2323
Well-known member
Hi,
following message in this thread:
https://groupdiy.com/index.php?topic=67343.40
it is worth to have one dedicated entirely to the subject of microphone body and mechanical issues and possible answer.
There is now a lot of knowledge about electronic design, choice of components, acoustical properties of headbasket, capsule, etc,etc, but not many things about body and related issues.
With the offer of medium priced chinese body we have really nice looking body to house our circuit and this is really nice.
But there is differences to the classic mic we try to clone most of the time.
Thanks to internet this is easy to spot and it is interesting to take a look at classic mic to see how things was done in the 'glorious old days'. ;D
Let's start with the grandfather of classic German mic, U47:
http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Neumann-Mikro/U47/U47.htm
Then, the Elam 251:
https://scontent-sea1-1.cdninstagram.com/t51.2885-15/s480x480/e35/14515633_357879077935382_2219332665541132288_n.jpg?ig_cache_key=MTM1MzYwMDY1MDk0ODQxMzMzMQ%3D%3D.2
http://www.coutant.org/akgc12/251-3.jpg
http://www.saturn-sound.com/images%20-%20microphones/telefunken%20elam%20251%20microphone%20-%20inside.jpg
http://www.klemm-music.de/telefunken/ela_m_251e_stereo/photo/ela-m251-stereo05.jpg
http://www.klemm-music.de/telefunken/ela_m_251e_stereo/photo/ela-m251-stereo12.jpg
Then Neumann m367 (special version of m269c with u67 headbasket build for ORTF):
http://www.infernalemachine.com/DATAPANIK/Neumann_M367_SN8324_0.jpg
http://www.infernalemachine.com/DATAPANIK/Neumann_M367_SN8324_8.jpg
https://medias.audiofanzine.com/images/normal/neumann-m-367-479503.jpg
Ok i think this is ok for now...
So what do they have in common from a mechanical/architectural point of view?
_First thing which strike me is that All this classic mic have a complete headbasket which is "closed" and don't have holes or other entry to the body tube.
_the u47 and the Elam are point to point using turret board and acrylic/perspex to mount components. The m367 too but it use pcb too.
_All tubes are 'decoupled' from mechanical structure: using rubber mount and elastic in u47, rubber mount for Elam and using 'coiled' wire for the m367.
Well... not what we have in most of our build using chinese body and pcb...
following message in this thread:
https://groupdiy.com/index.php?topic=67343.40
it is worth to have one dedicated entirely to the subject of microphone body and mechanical issues and possible answer.
There is now a lot of knowledge about electronic design, choice of components, acoustical properties of headbasket, capsule, etc,etc, but not many things about body and related issues.
With the offer of medium priced chinese body we have really nice looking body to house our circuit and this is really nice.
But there is differences to the classic mic we try to clone most of the time.
Thanks to internet this is easy to spot and it is interesting to take a look at classic mic to see how things was done in the 'glorious old days'. ;D
Let's start with the grandfather of classic German mic, U47:
http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Neumann-Mikro/U47/U47.htm
Then, the Elam 251:
https://scontent-sea1-1.cdninstagram.com/t51.2885-15/s480x480/e35/14515633_357879077935382_2219332665541132288_n.jpg?ig_cache_key=MTM1MzYwMDY1MDk0ODQxMzMzMQ%3D%3D.2
http://www.coutant.org/akgc12/251-3.jpg
http://www.saturn-sound.com/images%20-%20microphones/telefunken%20elam%20251%20microphone%20-%20inside.jpg
http://www.klemm-music.de/telefunken/ela_m_251e_stereo/photo/ela-m251-stereo05.jpg
http://www.klemm-music.de/telefunken/ela_m_251e_stereo/photo/ela-m251-stereo12.jpg
Then Neumann m367 (special version of m269c with u67 headbasket build for ORTF):
http://www.infernalemachine.com/DATAPANIK/Neumann_M367_SN8324_0.jpg
http://www.infernalemachine.com/DATAPANIK/Neumann_M367_SN8324_8.jpg
https://medias.audiofanzine.com/images/normal/neumann-m-367-479503.jpg
Ok i think this is ok for now...
So what do they have in common from a mechanical/architectural point of view?
_First thing which strike me is that All this classic mic have a complete headbasket which is "closed" and don't have holes or other entry to the body tube.
_the u47 and the Elam are point to point using turret board and acrylic/perspex to mount components. The m367 too but it use pcb too.
_All tubes are 'decoupled' from mechanical structure: using rubber mount and elastic in u47, rubber mount for Elam and using 'coiled' wire for the m367.
Well... not what we have in most of our build using chinese body and pcb...