[FEELER] C12 Clone Project

[Winetree]

Great timing.
Just finished a pair of D-U67s
so I  appriciate that fact we can use the supplied PSU Parts on this project.
I'll get started on PSB's and power supplies
As soon as I get a 3 sets of boards. " 3 months "
Thanks for the great job on making this possible.

 

[yosh]

Looks awesome! I'd like 4 headbaskets please!

Thanks!

Josh

 

[Melodeath00]

I may have missed it, but about how much will the turnkey package cost?

 

[chunger]

I may have missed it, but about how much will the turnkey package cost?

It's looking like somewhere just south of $1000.

 

[Scrappersa]

I may have missed it, but about how much will the turnkey package cost?

It's looking like somewhere just south of $1000.

How about headbaskets alone?

 

[chunger]

Please move all sales and pricing discussion to the white market per forum rules.

http://www.groupdiy.com/index.php?topic=50015.0

Most pricing and availability questions are updated on the 1st post there.

 

[chunger]

Looks like Matador is headed out of town for a little bit, so the task of final pcb verification falls on me  .  I might as well do the final build documentation at this time, so I've started doing some legwork to package a few parts kits and get everything looking like the final kit configuration for the photo set.

A couple of super small details are still pending, but I'm looking to start very soon.  I did not realize until I opened up all the parts and combed through everything that I needed 2-56 or M2 screw, nut, lock washer to mount the fuse holder and a couple of other really small details.

Anyways, getting close.  If anyone was planning to do this build, has prototyping technical knowledge and has parts already in hand to quickly proceed, please let me know and I can pre-release the pcb set.  Might not hurt to have a couple more eyes on the board before shipping out whole bunch.

 

[mwrichardson]

I have 2 mic bodies and all the parts. I would like to beta test your boards.

 

[chunger]

Just spoke with Oliver at AMI, and put in an order for a stack of T14 transformers and a handful of T13 and T67.  They should be shipping Monday.

As for transformer optimization, I discussed the boosted bass T14 winding with Oliver and we both decided it would be optimal for adjustments (if necessary) to be made at the capsule and leave the T14 stock, so that is what we did.  He also had some detailed information regarding the Ela M251 meshing which actually has gone through several iterations over the years, but was kind enough to provide me with some specs so i can get my headbasket set up correctly.

Always a pleasure to deal with AMI.

 

[Melodeath00]

Chunger,

Why did you want to boost the bass? Or is this some sort of alternate historic T14 that had more bass?

 

[HellfireStudios]

The older C12 transformer was much larger, and considered by many to have a better bass response.

-James-

 

[micaddict]

The AMI T14 is a copy of the big Hiller tranny, not of the later small Haufe T14/1.

 

[ioaudio]

And the third transformer used, the "Henry Radio"  V 2148 with a larger core than t14 and t14/1
http://www.saturn-sound.com/images%20-%20microphones/akg%20c12%20transformer%20types.jpg

 

[micaddict]

Thanks for chiming in, Max.
I knew about the Henry Radio (and posted about it earlier in the thread), but I thought it was very similar to the Hiller and I wasn't aware of the larger core in the HR.
When you talk about transformers, I listen.
Come to think of it, when you talk I listen anyway. 

 

[chunger]

Final revision build in progress in the official support thread:

http://www.groupdiy.com/index.php?topic=51377.0

Feel free to heckle and continue debating the pcb color choice.  Once that build completes and tests out, pcb's will be made available ob the webstore.

 

[3nity]

when will the Headbasket be available?
Thanks.

 

[chunger]

At minimum 2 months.  . . assuming the prototypes check out.  If not, we go through another revision.

 

[HellfireStudios]

Will the headbaskets have the cardioid symbol indicating the front of the mic? If so, I vote for stamped or engraved so I can paint the headbasket in a finish to match the rest of my mic, and still see the symbol clearly.

-James-

 

[chunger]

Will the headbaskets have the cardioid symbol indicating the front of the mic? If so, I vote for stamped or engraved so I can paint the headbasket in a finish to match the rest of my mic, and still see the symbol clearly.

-James-

Hi James,

No plans for markings or engraving right now.  I'll have to see how much cost it would add to the quote we have going.

 

[HellfireStudios]

Thanks. Keep us posted.

-James-