Kenwood MC 90 Microphone Manual

The Kenwood MC 90 is a professional dynamic microphone designed for amateur radio and communication applications. Featuring a cardioid pickup pattern, built-in PTT switch, 8-pin connector compatibility with Kenwood transceivers, adjustable gain control, and durable construction. Below are key sections for specifications, features, operation, connections, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to Transceivers 7. Operation Guide 8. Maintenance & Care 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Dynamic microphone element, PTT switch, gain control, 8-pin connector, coiled cable, desk stand mount.

Feature	Description
Microphone Type	Dynamic cardioid
Connector	8-pin modular for Kenwood transceivers
PTT Switch	Push-to-talk button on microphone body
Gain Control	Adjustable microphone sensitivity
Cable Length	Coiled cable extends to 2.5 meters
Frequency Response	300Hz - 3000Hz optimized for voice
Impedance	600 ohms
Mounting	Desk stand with threaded base
Weight	Approximately 350g
Compatibility	Kenwood TS-2000, TS-480, TS-590, etc.

Installation

Unpack and inspect contents. Ensure all components are present.

Connect to transceiver: Align 8-pin connector and insert firmly into microphone jack.
Position microphone: Place on stable surface using included desk stand.
Adjust cable: Extend coiled cable to desired length without strain.
Power on transceiver: Ensure transceiver is powered and functioning.

WARNING! Do not force connector; ensure proper alignment before insertion. Avoid pulling cable excessively.

First-Time Setup

Configure microphone settings for optimal performance.

Connect microphone to compatible Kenwood transceiver.
Adjust gain control: Start at mid-position and adjust based on audio levels.
Test PTT function: Press and hold PTT button to ensure transmit activation.
Position microphone: Place 10-15cm from mouth for optimal voice pickup.
Check audio quality: Have another station provide feedback on audio clarity.

CAUTION! Ensure transceiver is in receive mode before testing PTT function.

Specifications

Type: Dynamic moving coil
Pickup Pattern: Cardioid
Frequency Response: 300Hz - 3000Hz
Impedance: 600 ohms
Sensitivity: -74 dB ± 3 dB (0 dB = 1V/Pa at 1kHz)
Connector: 8-pin modular (Kenwood standard)
Cable: Coiled, extends to 2.5 meters
Dimensions: 180mm (H) x 60mm (W) x 45mm (D)
Weight: 350g (including cable)
Operating Temp: -10°C to +50°C

Controls and Settings

Microphone body features: PTT button, gain control wheel, microphone element.

PTT Button: Press and hold to transmit, release to receive. Located on front of microphone.

Gain Control: Rotary wheel on side of microphone. Adjusts microphone sensitivity: - Lower position: Reduced sensitivity for loud environments - Higher position: Increased sensitivity for quiet environments

Optimal Positioning: Hold microphone 10-15cm from mouth at 45-degree angle for best audio quality.

Connecting to Transceivers

Compatible with Kenwood transceivers featuring 8-pin microphone jacks.

Ensure transceiver power is OFF before connecting.
Align 8-pin connector with transceiver microphone jack.
Push connector firmly until it clicks into place.
Secure cable to prevent strain on connector.
Power on transceiver and test functionality.

Compatible Models: TS-2000, TS-480, TS-590, TS-870, TS-950, and similar Kenwood transceivers with 8-pin microphone connectors.

Operation Guide

Proper microphone technique for optimal performance.

Transmit: Press and hold PTT button, speak clearly into microphone.
Receive: Release PTT button to listen to incoming signals.
Gain adjustment: Rotate gain control based on background noise and voice level.
Microphone position: Maintain consistent distance (10-15cm) from mouth.
Voice level: Speak in normal conversational tone; avoid shouting.
Cable management: Keep coiled cable extended naturally without kinks.

WARNING! Do not expose microphone to moisture or extreme temperatures. Avoid dropping or impact.

Maintenance & Care

Regular maintenance ensures long-term performance.

Cleaning: Use soft, dry cloth to wipe exterior. For grille, use soft brush to remove dust.

Storage: Store in dry environment away from direct sunlight and extreme temperatures.

Cable care: Avoid sharp bends and excessive pulling. Coil naturally when not in use.

CAUTION! Do not use solvents, alcohol, or abrasive cleaners. Do not disassemble microphone.

Regulatory Information

FCC Part 15: Class B digital device compliance. CE marked for European market. Manufactured to Kenwood quality standards. Copyright © Kenwood Corporation. For technical support and service, contact authorized Kenwood service centers or visit www.kenwood.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No transmission	PTT not functioning	Check PTT button operation; verify connector seating
Weak audio	Gain setting low	Adjust gain control clockwise; check microphone position
Distorted audio	Gain setting too high	Reduce gain control; move microphone further from mouth
Intermittent operation	Cable damage	Inspect cable for damage; ensure secure connection
No audio	Connector issues	Verify proper connection; test with another microphone
Background noise	Environmental factors	Reduce gain; use in quieter environment; check grounding

Service: Contact authorized Kenwood service center for repairs. Do not attempt internal repairs.

Support: www.kenwood.com | Kenwood customer service hotline