"Ultimate" Multipattern Tube Mic Build?

Help Support GroupDIY:


New member
Jan 9, 2016
Hi all,

I've been lurking here for years, and I have now decided to come out from the shadows. Before I ask my questions, I will provide just a bit of background about myself.  I am just a small home studio engineer and musician, living and working in Manhattan, KS. While I am a professor at Kansas State during the day, I love gear. I love fixing it, modding it, selling it, buying it, and most of all using it. If you need any Child Development advice, ask away! I have a B.S. in Psychology from Indiana University, Bloomington and an M.S. and a Ph.D. from Virginia Tech in Human Development.

However, I am relatively inexperienced when it comes to electrical engineering. While I can barely muddle through a schematic, I don't really know how to properly use my multimeter to troubleshoot electronic circuits. I have modded several mics, including capsule swaps, cap removal and replacement, and have completely built an Apex 460 using the microphone-parts Fox 460 kit. What I'd like now is to build the very best multipattern tube mic I can.  So I have several questions:

1) Tim Campbell seems to make the best capsules this side of Germany. Are there any others I should consider?
2) I have an Apex 460 that I LOVE, but what are opinions about which model to build next? I mainly record stringed instruments and mostly male vocals.  I have no shortage of good mics (e.g. Schoeps, Vintage AKG, Advanced Audio, Royer), but I want to really create a no holds barred, top notch quality, no compromises tube mic.
3) Is there such a mic that has been built by many others who could provide me with the PCB and BOM?
4) Any other advice or critiques?

I would also like to make this mic so I could eventually drop in a vintage C12 capsule, which I know is not cheap!

Thanks in advance for the help.

The Dewd

Carl Cress

Well-known member
May 30, 2015
Take a look at http://store.studio939.com Matador C12. I'm currently building a matched pair and I'm sparing no expense on caps, tubes and a Tim Campbell CT-12 capsule.  I ordered the PCB, parts kit and alctron ht-11 with the c12 open style head basket. Capsule, tubes, 0.5uf capacitor and AMI T14 are ordered separately. There is also an Elam 251 version.


Well-known member
Aug 11, 2012
If you like the design, if it's something which gives you  fun, then why not?
Anyway C12 circuit is possible to build with original apex/alctron PCB :)