Vertex Standard MH-31A8J dynamic microphone

The MH‑31A8J is a genuine dynamic handheld microphone from Vertex Standard (Yaesu), engineered for reliable performance across a wide range of HF and VHF transceivers. It features an ergonomic grip, built-in tone control buttons, an 8-pin modular (RJ45) connector, and a durable coiled cable.

Technical Specifications:

• Microphone Type: Dynamic

• Impedance: 190 Ω ±30 % at 1 kHz

• Sensitivity: –78 dB ±3 dB at 1 kHz (0 dB = 1 V/0.1 Pa)

• Tone Frequency Response: Full-range on Tone 1; –14 dB ±3 dB at 100 Hz on Tone 2

• Connector: 8-pin RJ45 modular plug

• Weight: ~183 g (7 oz)

• Dimensions: ~63 × 114 × 31 mm (2.5 × 4.5 × 1.25 in)

• Included Accessories: Microphone clip and mounting screws