Unknown AKG capsule (diy mic help)

[hajko]

Hi, guys.

I found this capsule on line, but there's no info at all. It's akg ck40. It's 15mm x 6mm in diameter.

I already built a mic based on schoeps circuit (Zapnspark version) and i used J305 fet...it works ok, except a huge high frequencies boost. I will post images of disassembled capsule.
I tried to lower high frequencies by soldering 6.2nf or so...in parallel with drain resistor. It helped, but it needs more taming.

My question is...do i need to build a circuit with polarization voltage for the capsule...Would that help...and is this electret or condenser type?

Thanks.

 

[dotneck335]

According to AKG data sheet, "CK" prefix indicates "Microphone capsule with condenser transducer"
therefore it must be polarized.

 

[Nitrous2000]

use of AKG CK80 capsules

Hi Folks,


I'm at the absolute beginning here... so please take that into consideration 🙂


I see a lot of inexpensive AKG capsules on EBay. They never come with the base. I have looked at the documentation around these modules... they seem to be quite simple in terms of mute/LED etc... but my question is... Can these be adapted to an XLR base with little/no circuitry? I understand that they need a phantom power supply.



Any suggestions would be appreciated. I'm looking for a reasonable quality out-of-frame shotgun microphone for recorded powerpoint presentations.


Thanks again,
Doug

 

[dotneck335]

I seem to recall that Linkwitz had a bit of info on his site about that mic capsule.