A rotary control for Up/Down and Fast/Slow frequency tuning. Wiring Pinouts The MD-100 uses a standard Yaesu 8-pin configuration. Wire Color 1 2 3 4 Fast (on some models) 5 6 7 Mic Ground (Shield) Shield/No Color 8 Documentation Resources
The schematic shows this involves a network that boosts frequencies in the 1kHz to 3kHz range, adding a "bright" sound that helps in cutting through atmospheric noise. 3. Control Stage: PTT, Scanning, and Powering Yaesu Md 100 Schematic
What specific are you connecting to the MD-100? A rotary control for Up/Down and Fast/Slow frequency tuning
Low-cut and High-Emphasis switches that shape the frequency response. The base houses a large Push-to-Talk (PTT) switch
The base houses a large Push-to-Talk (PTT) switch and a smaller Lock switch. The schematic shows these are simply grounding the PTT or Lock line in the cable connector. C. Cable Connector Wiring (RJ-45 and Round 8-Pin)
