I had this capsule lying around, so i decided to do a mod to it based on b&k paper. The capsule is a k67/k47 hybrid, but the principle is the same for almost any capsule.
This one can "easily" be modded, as the diaphragm is glued to the tensioning ring, and won't collapse when detached.
The science behind is that increasing diaphragm damping will smooth out the resonant frequency peak. Which was the goal here. Like with 3U audio's smooth k67 or Neuman's TLM103 the goal was to reduce the count of blind holes on the backplate, which increases damping. I closed 28 blind holes (if i counted correctly) and made the capsule almost flat! I used epoxy. I dropped tiny drops using a needle. I tried to do it as random as possible. But nothing scientific. I polished it with sandpaper, and needless to say removed any excess dust remaining.
Here's the capsule link:
https://www.ebay.com/itm/34mm-mylar-capacitor-microphone-large-diaphragm-capsule-mic-cartridge-core-/303850450014?_trksid=p2349624.m46890.l49292
B&K paper:
https://www.bksv.com/media/doc/be1447.pdf
This one can "easily" be modded, as the diaphragm is glued to the tensioning ring, and won't collapse when detached.
The science behind is that increasing diaphragm damping will smooth out the resonant frequency peak. Which was the goal here. Like with 3U audio's smooth k67 or Neuman's TLM103 the goal was to reduce the count of blind holes on the backplate, which increases damping. I closed 28 blind holes (if i counted correctly) and made the capsule almost flat! I used epoxy. I dropped tiny drops using a needle. I tried to do it as random as possible. But nothing scientific. I polished it with sandpaper, and needless to say removed any excess dust remaining.
Here's the capsule link:
https://www.ebay.com/itm/34mm-mylar-capacitor-microphone-large-diaphragm-capsule-mic-cartridge-core-/303850450014?_trksid=p2349624.m46890.l49292
B&K paper:
https://www.bksv.com/media/doc/be1447.pdf