Trouble with t47 build

[Jayy]

Hello!
I've just completed my first diy mic build but it's not turned out so well so far.
It's a t47 kit from micparts, all the parts have been installed in the right spot I guess, when I plug the mic in the preamp, it can work allright for some time, then for no particular reason sounds fade and dies.

I've made all the measurements in the troubleshooting section of the manual but they seem normal.
Do you guys have a clue what might be going on?
Thank you

 

[Drosselmeier]

Publish a circuit scheme.

 

[Jayy]

It actually was the capsule that didn't function properly. The mic behaves correctly with a new one.
How can I close this thread?