Boosts higher frequencies to help audio "cut through" during DX contacts.
Offers two stages of low-frequency attenuation. Yaesu Md 100 Schematic
From a repair perspective, the MD-100 schematic is an invaluable resource for the radio amateur. As these microphones age, components such as the electrolytic capacitors in the amplifier circuit can dry out, leading to reduced audio output or hum. The switch contacts, shown clearly in the diagram, are also prone to oxidation. Access to the schematic allows the operator to trace the signal path, identify test points, and replace faulty components. It transforms the device from a "black box" into a serviceable piece of equipment, extending its lifespan significantly. Boosts higher frequencies to help audio "cut through"