New 22mm (km184/kk105 style) Capsule

[pmfalcman]

I can't believe no one asked this, but how did you cut such a precise ring out of Sctch tape?

Aaah! Good you mentioned this! Thanks a million!
I meant to at least a dozen times. But was in no position to post at the moment when I remembered.
@kingkorg ! Please do tell!

 

[jp8]

I'm curious about kk's method as wel, but here's how I did it:

1) Stick the tape on the backplate. Tape width >=20mm. I used Mylar tape, but with 50um thickness, it is actually too thick.

2) With a pair of scissors, remove the tape sticking out from the capsule.

3) With a sharp knife, and working under my microscope, I cut out the center piece of the tape along the edge of the brass inner part of the backplate where it meets the plastic insulator ring around the backplate.

As I said, the mylar tape was too thick. Sensitivity dropped by 10 dB. So I removed the tape an assembled the capsule again. Sensitivity was still not back to the original value and Frequency Response a hilly landscape. The only positive thing I achieved was the removal of the deep trough.

Good luck....