Neumann M269c Clone : D-M269C Tube Microphone Build Thread +(sample)

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poctop

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D-M269C Build thread


All of the info here : http://www.groupdiy.com/index.php?topic=49675.0

Attention R14 (plate) = 100K

Schematic Here :  https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a04d0a.pdf

PSU Schematic : https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a04d18.pdf
Note : the Toroidal tranformer secondary is wired in parrallel to get 120V at the input of the psu

The 20Vac traffo for Europe will not fit as per the current BOM please replace it with this one or an equivalent ,
http://www.mouser.com/ProductDetail/Hammond-Manufacturing/186B20/?qs=sGAEpiMZZMvwUzoUXIIvyQPvPmwnNFGyR%2fQB%252b1BzrOY%3d
also The fuse will be 0.1A instead of 0.2 for America


IMPORTANT:
You Should always have the SHLF Jumper in position in the PSU PCB ,  this will ensure that your cable shield is tied at both end of the cable and connect to 0V
you Should Also have the 0V star grounded to your case and then from there to you IEC earth ground ,



For More Information on Grounding
https://www.dropbox.com/s/6y121dasm3iw4ba/Sound_System_Interconnection.pdf?dl=0

Cabling connection From PsU https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a04d39.jpg

D-M269C Overall Connection :  https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a04d5c.jpeg

Another Piece of advice : when soldering the Tube to the Turret make sure you use the gravity in your advantage so the turret does not comes out of the hole when heating.


The Safety Manual and Considerations.https://cdn.groupbuilder.com/groupdiy/u/39511/58d1402a04d6c


Note :  Not in BOM Styroflex Capacitor 100pf/630V    and Stryoflex Capacitor 270pf/630V

BOM Needed

U67 Mic part :        http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=83ad963d23
M269 b or C option http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=6bb38c7d28
PSU :                       http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=532017ac2f

this errata also aplies to M269c please consult the U67 thread as the same correction applies,
Errata Feedback winding polarity  http://groupdiy.com/index.php?topic=50021.800 reply # 814

for AMI T67 only Corrected Wiring to main microphone pcb

From transformer board to mic PCB

Pad 5 ----->  mic pcb pad T1212
Pad 12 -------> mic pcb pad T55
Pad 1 --------> mic pcb pad T44
Pad 4 --------> mic pcb pad T11
Pad 7 --------> mic pcb pad T1010
Pad 10 ------> mic pcb Pad T77



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Wiring Guide for the M269c for pattern and Low Cut and Pad Follow the direction in this thread here they apply to both the M269b and the M269c
  Right here in the Build part 2 section  http://www.groupdiy.com/index.php?topic=51350.0




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micaddict

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I suggested this on the 4th of January. Now I wish I'd kept my big mouth shut. I already have the D-U67 and I will be strong. I will be strong. I will be strong. I will be strong. I will be strong. I will be strong. I will ............
 

poctop

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micaddict said:
I suggested this on the 4th of January. Now I wish I'd kept my big mouth shut. I already have the D-U67 and I will be strong. I will be strong. I will be strong. I will be strong. I will be strong. I will be strong. I will ............

you put me up to it ,  ;) , can i take my promised break then  8),
Best ,
D
 

micaddict

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you put me up to it ,  ;) , can i take my promised break then  8),
Best ,
D

I must confess, on the 14th of February I urged you to do the c-version, too. I couldn't help myself.  :-[
And yes, you were promised a break in return.

Well, OK then. But keep it short.  ;)
 

poctop

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Spencerleehorton said:
Hi All,

I was told a Mullard CV465 tube would also be good for this circuit? any one have any points of view regards this?

regards

Spence.

I would say that there is anything like trying it  ;) and find out ,
Best,
DAn,
 

poctop

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here is with Ac guitar  a budy came down here at improvist and sampled that for me ,

https://cdn.groupbuilder.com/groupdiy/u/39511/58d0281993c74.wav

Best,
Dan,
 

micaddict

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Dan, do you still have that D-67/AMI you built?

Also, what did you do with S2 (40 Hz high pass) in this here D-269c built?
Perhaps it's visible in the pictures.

Finally, the SYT-5 body has the pattern switch, but the PSU for the M-series has, remote, variable patterns, too.
Any comment on that?


Henk
 

poctop

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micaddict said:
Dan, do you still have that D-67/AMI you built?

Also, what did you do with S2 (40 Hz high pass) in this here D-269c built?
Perhaps it's visible in the pictures.

Finally, the SYT-5 body has the pattern switch, but the PSU for the M-series has, remote, variable patterns, too.
Any comment on that?


Henk

yes i do have those aMI 67 build ,  i will try when i have time to swap the neumann capsule in them and take some shoutout,

on the recorded sample the S2 is engaged as the normal operation ,

the switch on the SYT-5 will work exactely as the original M269  wich is that you have to switch on the micbody to the (F) pattern for 8 and omni and then switch it on the PsU,  like the original worked at the time , since it is a simpler switching design a simple toggle switch could also be used for the pattern as well,

To be continued,

Best,
Dan,
 

poctop

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Here is a alternative for the 1000pf cap for the D-M269C build  200Vrating will work fine , it has been added to the bom cause the order part suddently changed in minimum qty  :eek:,


Here is the part number,

http://ca.mouser.com/Search/ProductDetail.aspx?R=WMF2D1K-Fvirtualkey59850000virtualkey598-WMF2D1K-F
 

micaddict

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Yes!  :p

Another home run for Dan.

I really like what I'm hearing. (As always on this forum, I'm not talking about the song or performance, as nice as they may be. But do thank your friend from me!)
Of the earlier, related, samples, I very much liked the D-67 with the Neumann K67 capsule (there were two Neumann capsules tested actually and one was better or better preserved maybe than the other).
The sample of the D-269b (fixed bias) with the Peluso K67 I liked a little less (although I simply loved the D-49b with the Peluso K47).
This D-269c (self bias) with the Neumann capsule sounds great to my ears. It is somewhat brighter than the typical U67 sound and the self bias may play a part in that. Different tube and setup, too. But the esses are pretty precise (I'm sensitive to that) and the mic is in no way harsh sounding. It sort of sounds like a cross breed between a U67 and a Brauner tube microphone. The latter has a K67-family capsule too, as well as a 5840 tube. But Brauners have a more straightforward circuit, AFAIK without any negative feedback at all, let alone tricks with transformer windings.
Still, some of that velvety, musical compression I hear in U67s is still present here, albeit with a little less thick midrange character and some extra air on top. So it's not just the EF86 in the U67 causing that velvety compression. It's the nature of the U67 family of microphones. The EF86 (and fixed bias) only adds to it.
In contrast, the M49 sounds smoother, creamier.

The U/D-269c is possibly even more versatile than the U/D-67. With the added air it should be brilliant for more distant recording, too. And up close, it sounds more modern than a U67 (i.e. without EQ).
Desert island microphone?


 

poctop

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Here is some  alternatives for the 5*11mm caps needed specifically for the M49bc square and round,  also in the U67 and 269c mic,


http://www.alliedelec.com/search/searchresults.aspx?dsNav=Ntk:primary|MKT1813310405|3|,Ny:True,Ro:0&dsDimensionSearch=D:MKT1813310405,Dxm:All,Dxp:3&SearchType=0


http://canada.newark.com/vishay-roederstein/mkt1813310405g/capacitor-film-0-01uf-400v-axial/dp/26M1636?Ntt=MKT1813310405

http://canada.newark.com/vishay-roederstein/mkt1813-310404/capacitor-poly-film-0-01uf-400v/dp/18M2494?Ntt=MKT1813310404

http://fr.farnell.com/vishay-roederstein/mkt1813310405g/condensateur-0-01uf-400v/dp/1166851?Ntt=MKT1813310405

 

poctop

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For those that will be building the mic project that needs the 0.01uf  capacitor in the package 5*11mm  i have been able to change mouser minds to offer a 10% variation at a minimum qty of 1  ;),

here is a link for it ,
http://ca.mouser.com/ProductDetail/Vishay-Roederstein/MKT1813310405/?qs=N5kmjX/bzE4Fjs7uA0EePA==

i aslo went over my BOM and added in the customer part number cell some nice subsitution for the parts that went back order , should be all good now ,

Best,
Dan,
 

Spencerleehorton

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HI Guys,

Got the M269c all fired up finally, followed the M269b thread for wiring in the switches which helped no end.
This really is a fantastic mic, fully bodied, sits perfect in the mix, really blown away with the sound, now to make a few more!!!
I kept the 150k R14 and didnt change it to 100k, im building another PSU now with 100k pot for going though all polar patterns.
best advise is get this one going people!!!! you wont regret it.
Ive used the microphone part RK7 capsule, 5:1 transformer from here:
http://www.ebay.co.uk/itm/200923375342?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
very much like the peluso transformer, sounds great

regards

Spence.
 
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