Sorry for the dumb question, but what polarization voltage does it supply to the capsule?
If it does supply, like the KM84, only "less then 48V" - it will not be suitable for any of the mentioned capsules as they ask for 60V polarization voltage to work to their specifications....
That's a great observation and yes the polarization voltage supplied to the capsule is in the area of "slightly less than 48V" like the KM84 or vintage U87 circuits which both use different capsules biased at that voltage. It is my understanding that the 60V (or perhaps even 70V) polarization spec is a max value before the diaphragm becomes sucked to the backplate due to electrostatic attraction.
The slightly lower polarization voltage does at least two things - It creates slightly less tension on the diaphragm and it slightly reduces the signal level from the capsule into the FET. In my tests the mic is very quiet and has more signal output than a vintage U87.
In reference to capsule specifications and polarization voltages I would like to point out that in many tube mic designs with variable patterns (for instance) that the rear diaphragm will see 0-120V depending on the selected pattern, the backplate will see a fixed 60V, and the front diaphragm will see 0V so if you have one of these tube mic's that uses that type of pattern adjustment and you would like to perform some polarization / sonic tests you could ground the front capsule (instead of connecting it to the grid), and use only the rear diaphragm with the variable bias / rear-diaphragm-voltage.
Cheers!
-jonathan