CK12 capsule on ALCTRON HST11A

[modulay]

Hi everybody.

I want replace the capsule of mi ALCTRON with a teflon CK12.
This is the mic actual schemo:



It shows the voltages at the 4 points I measured.

And this is the capsule with its 4 connection points:



Points 1 and 2 are the backplates, aren't they?
The old capsule has only three connection points, so...How should I connect the CK12 in the circuit?
Another question is about de capsule voltage...
I read around here that the voltage should be 60V, but....In which point in the mic schematic?

Thanks a lot

 

[pasarski]

Polarization voltage is measured before the polarization resistor resistor, your 65V should be fine. Just connect both back plates together, little hard to tell from the picture but probably pins 1 and 2.

 

[modulay]

Hi, pasaski.
Then...Connect backplates together and wired to C4 and R10?

 

[pasarski]

Yes, they work as a single backplate that way.

 

[modulay]

The mic os working.
Thanks pasarski