Oktava MK-12 resources

• Youtube: how microphone phantom power works
• RT-012 - Remodel of the Oktava MK-012 PCB
• Discussion about the Oktava MK-012 preamp
• Oktava MK-012 rebuild project
• Repairing an Oktava MK-012
• Oktava MK-12 circuit discussion - good explanation in post by PRR