Neumann U 47 Clone - A DIY Bachelor Thesis

[Zottel]

@rock soderstrom: I resized the pictures you should be fine now

I've never been to gearslutz so sorry I'f im provoking any bad feelings. I think that some guys would like to do a "uncolored" test. You all know the name game and the psychological effects of it. So I'll stick to my plan 

 

[Zottel]

Piano:
A = original
B= DIY

Acoustic Guitar:
A = original
B= DIY

Drums:
A = DIY
B= original

Vocals:
A = DIY
B= original

Feel free to tell me what you think.

 

[ln76d]

I only was wrong with the vocal, and with this i had problem during listening

 

[Zottel]

What where your feelings about it? Less Bass with my build seems to be something i could verify in the first few abx tests.
Although my testers told me they liked the top end of my build a more.

 

[ln76d]

I can't say much about low end because i still didn't listened smples on the speakers.
Personally i prefer much more  top end like in original.
It doesn't mean that u47 out of factory had exactly same frequency response like this used for comparison
To get true opinion i will have to test it by myself, but i will try in a free time listen your tracks on the speakers and then maybe i'll be able to say something  more
Anyway! Great build!

 

[Zottel]

Thanks I apprichiate your kind words 

 

[Pip]

So how did you damage the heater circuit of the SS tube? Was it heat or over voltage?

 

[Zottel]

Not sure about that. Even Andreas was kind of puzzeld about it.

I didnt change anything. Pluged a new tube and from then on its working very fine.

 

[Matt Nolan]

Not sure about that. Even Andreas was kind of puzzeld about it.

I didnt change anything. Pluged a new tube and from then on its working very fine.

Mechanical shock perhaps? Especially if it happened when the tube filament was hot.

 

[Zottel]

We turned it off and waited for ~15 minutes to pack it into my bagpack. It's a very cosy backpack and the wooden box looks good as well!  ???

 

[Zottel]

Just one more picture  :

 

[Zottel]

Hey! Does anybody know what kind of material was used in the making of the original bodys/headgrills of a U47?
Does somebody know where they where made? Cant find anything neither in literature nor in the web.

 

[micaddict]

OK, let's start with the body (sleeve).

Most were aluminum, but the very first were brass or maybe actually a gun metal alloy which would be more towards bronze.
Heavier than aluminum in any case.

 

[Andriejus]

Hey,

I have also information (i am not sure it is right), that body tube and the bell were made from duraliuminium.
Headgrille - brass
Mesh - brass

Best,
Andrew

 

[Zottel]

Hey guys,

just wanted to let you guys now that I got my results for the bachelor thesis. It went extremly well!

So thanks again for all the countless support!

 

[Andriejus]

Congradulations!