PH4B Phantom Power Supply

The Crown PH-4B is a 48-volt phantom power supply for condenser and
electret-condenser microphones. It has four channels for powering up
to four microphones.

As shown in Fig. 1, it supplies 48V DC on mic-connector pins 2 and 3
with respect to pin 1 (complies with DIN standard 45 596). The phant...