Neumann U47FET Clone: D-U47 FET Microphone Project PCB Build thread

[acdc-angus]

Two happy FETs waiting for a stereo recording.. 

Cheers!
//Michael

You painted it by yourself? Beautiful mics !

 

[mgronroos]

Thanks, acdc-angus!

No, I did not do it myself.
I had them powder coated here in Stockholm.

Considering the total cost of a project like this, I think it is worth the little extra cost to powder coat instead of using normal spray color. The finish and durability is so much better.

//Michael

 

[burn4ever]

Hey fellas,
did I have to use the jumpers? But how?

 

[poctop]

s1a s1b ,  jumper in both places  1 direction = pad
no jumper both position you can place the jumper only in 1 pin to let them hang there = no pad

LC = jumper on = low cut ,

Best,
Dan,

 

[burn4ever]

Thanks for the patience and quick reply Dan 

Is it right that I have to use the 1000pF Capacitor instead the 2200pF for C1?

 

[poctop]

Thanks for the patience and quick reply Dan 

Is it right that I have to use the 1000pF Capacitor instead the 2200pF for C1?

use the 2200pf,
Dan

 

[acdc-angus]

Sorry, what the difference between "pad" and "no pad"? I'm a noob... Ahaha ;D

Mouser orders done ! But Molex 2 headers wasn't available... So, I must wait until 20th March...

 

[acdc-angus]

Hi,

I have some wire from a JMP 2203 project. Can I use these for the U47Fet? (TR32 22 Awm 600v) XRL to PCB and link both side?

Thanks

That's my project for now

 

[poctop]

Hi,

I have some wire from a JMP 2203 project. Can I use these for the U47Fet? (TR32 22 Awm 600v) XRL to PCB and link both side?

Thanks

That's my project for now

Nice Picture,
have you been using the 30M + 100M in the Z region connecting the fet ?
i see the R5+ spot is empty if you did then you are fine
you can use teflon isolated 26-27 gauge wire this is the best stuff ,
if not regular 26-27 gauge wire will do fine ,
if you use too big wire you will be missing the flexibility of the wire
Best,
DAn,

 

[acdc-angus]

Nice Picture,
have you been using the 30M + 100M in the Z region connecting the fet ?
i see the R5+ spot is empty if you did then you are fine
you can use teflon isolated 26-27 gauge wire this is the best stuff ,
if not regular 26-27 gauge wire will do fine ,
if you use too big wire you will be missing the flexibility of the wire
Best,
DAn,

Thanks !

Yes it's 30M and 100M. I wanted the minimum possible of composants. More easier to soldering

So, I can use my wire? If I don't need buying others, it's good ! Ahah

If not, I have this (picture below), can I take the wire on it to use in mic?

 

[burn4ever]

Two happy FETs waiting for a stereo recording.. 

Cheers!
//Michael

Looks very nice!
Were did you build these custom badges?

 

[burn4ever]

Hey guys,
does anybody knows what kind of screws I need to fix the pcb to an GT-2B body?
The screws from this mouser list
http://www.vintagemicrophonepcbkit.com/DU47FET.html
are to big:
http://www.mouser.de/Search/ProductDetail.aspx?R=9300virtualkey53400000virtualkey534-9300

And what kind of cable diameter do you use to connect the components, like the transformer, to the pcb?

 

[poctop]

Hey guys,
does anybody knows what kind of screws I need to fix the pcb to an GT-2B body?
The screws from this mouser list
http://www.vintagemicrophonepcbkit.com/DU47FET.html
are to big:
http://www.mouser.de/Search/ProductDetail.aspx?R=9300virtualkey53400000virtualkey534-9300

And what kind of cable diameter do you use to connect the components, like the transformer, to the pcb?

I Am under the impression that the screws should come with the GT-2B body but I may be wrong ,
the bracket and screw inside this current BOM is for the New version of the D-47FET pcb that will adapt the U47 style Mic
body,  if you don't need them you can skip them out of this BOM
IIRC the screws for the pcb to gt-2b are 2mm screws (M2).

Best,
Dan,

 

[burn4ever]

Hey Dan,
thanks.
No screws to mount the pcbs comes with the GT-2B body, but I think  to buy 6 extra screws is in my budget 

 

[MicDaddy]

Is it possible to buy the Neumann k47, since now they are reissuing the mic?  Price?

The k67 is not very expensive, so if the k47 is in that range I'll go for the Neumann for #2.

I have one of ChuckD's m7 in my first, but he no longer offers the m7 to DIYers.

Thanks

 

[poctop]

Is it possible to buy the Neumann k47, since now they are reissuing the mic?  Price?

The k67 is not very expensive, so if the k47 is in that range I'll go for the Neumann for #2.

I have one of ChuckD's m7 in my first, but he no longer offers the m7 to DIYers.

Thanks

I have one of ChuckD's m7 in my first, but he no longer offers the m7 to DIYers.

I am Hoping To be soon able to fix this problem,
See Here:
http://groupdiy.com/index.php?topic=58663.0

 

[kidvybes]

I am Hoping To be soon able to fix this problem,
See Here:
http://groupdiy.com/index.php?topic=58663.0

...and some of us continue to wait patiently...

 

[burn4ever]

I have a question to the position (mount) of the capsule.
This is a realy nice build from a member here, but
looks like the capsule sits to high, or am i wrong?

And does anybody have experience what kind of mound from Thiersch http://thiersch-mic.de/en/estm_produkte.html will fit into the GT-2B body? Mounts from Thiersch have hights from 52mm - 58mm. But I think these all to high for the GT-2B body.

 

[micaddict]

It sits pretty high in the original and there's a theory why that is.

I'll see if I can post the picture I have in mind.

 

[micaddict]