Description
Yaesu MH-31A8J Dynamic Hand Microphone for HF Transceivers
The MH-31A8J microphone is Yaesu’s dynamic hand microphone for HF transceivers. Yaesu names it as the supplied hand mic for models such as the FT-450D, FT-857D, FT-897D, FT-817ND and FT-991A. It carries a PTT switch and UP/DWN keys on the front, plus a tone switch on the back. CQFF Radio Communication supplies the MH-31A8J microphone for wholesale and B2B orders.
Product Overview
The MH-31A8J is the talk unit that ships in the box with many Yaesu HF radios. It sits in the hand or hangs from a clip on the desk. One large push-to-talk bar handles transmit and receive.
Two keys above the PTT bar give you UP and DWN. Yaesu’s FT-991A manual tells operators to use those very buttons on the supplied MH-31A8J hand microphone. The FT-891 manual labels the same controls “MH-31A8J Microphone Key Buttons”. So the keys are an official feature, not an aftermarket addition.
A small tone switch sits on the back of the microphone. The FT-857D and FT-897D manuals describe it in plain terms: it alters the transmit sound quality. The switch gives you two positions, and Yaesu’s own technical sheet measures both of them.
The suffix on the model number matters. Yaesu lists a separate part, MH-31B8, in its accessory pages for the FTDX9000 and FT-2000 series. That is a different member of the same mic family for radios with a different socket. Always match the part number to the radio in front of you.
A note on the connector. Yaesu’s MH-31A8J technical sheet does not print a connector type. Distributor listings describe the plug as 8-pin modular, RJ-45, and cross-list the part as “same as supplied”. Treat that as dealer guidance, not an official figure, and check the MIC jack on your own radio first.
One more practical point. Sellers disagree about what is in the box. Some list a mic clip, others list only the microphone and a windscreen. Tell us the market you ship to and we will confirm the bundle contents with the factory before you order.
CQFF Radio Communication supplies the MH-31A8J microphone for wholesale orders. Dealers often buy it together with the MH-36E8J DTMF microphone, spare curl cords and desk stands, so send the full list.
Technical Specifications
- Model: MH-31A8J
- Brand: Yaesu (Vertex Standard)
- Product type: dynamic hand microphone for HF transceivers
- Microphone type: Dynamic
- Microphone impedance: 190 ohm ±30% at 1 kHz (tone 1)
- Microphone sensitivity: -78 dB ±3 dB at 1 kHz, 0 dB = 1 V / 0.1 Pa (tone 1)
- Audio tone response: tone 1, full range; tone 2, -14 dB ±3 dB at 100 Hz
- Weight (approx.): 183 g
- Front panel: PTT switch and UP/DWN keys
- Rear panel: tone switch with two positions. It alters transmit sound quality
- Official name in Yaesu documentation: “DYNAMIC MICROPHONE MH-31A8J”, from the MH-31A8J Technical Supplement (©2003 Vertex Standard Co., Ltd.)
- Officially referenced by Yaesu as supplied with: FT-450D, FT-857D, FT-897D, FT-817ND, FT-991A. Yaesu’s FT-450D product page marks it “Included”
- Listed in Yaesu accessory tables as “Hand Microphone” for: FT-450D and FT-891
- Also listed by dealers for: FT-817, FT-818, FT-857, FT-897, FT-891, FT-991. Confirm the MIC jack on your own model
- Related model: MH-36E8J, the DTMF microphone that Yaesu lists alongside the MH-31A8J for the FT-450
- Consumable listed in the official parts table: curl cord assembly
- Not published by Yaesu for this part: connector type, cord length, water rating and body dimensions. Ask us and we will confirm the details with the factory before you order
Contact Us
Wholesale and B2B buyers are welcome. Tell us the radio models you service, the quantities you need and the market you ship to. We will send a tailored quotation.
Sales Manager: Kevin
WhatsApp: +852 60731163
WeChat: +8616623617128
Email: fengfanannie@163.com
Browse our radio range, or read the B2B buyer guide before your first bulk order. Tell us your radio model and we will confirm the matching microphone and clip.
