Icom SM-50 Desktop Microphone
Instruction Manual
Thank you for choosing this Icom product. READ ALL INSTRUCTIONS carefully and completely before using this product.
The SM-50 is an unidirectional, dynamic microphone designed for base station operation with an Icom transceiver.
Precautions
- CAUTION: NEVER expose the microphone to rain, snow or any liquids. The microphone may be damaged.
- CAUTION: NEVER let metal, wire or other objects protrude into the microphone or into connector.
- CAUTION: NEVER touch or operate the desktop microphone with wet hands.
- CAUTION: NEVER use harsh solvents such as benzine or alcohol when cleaning, because they will damage the microphone's surfaces.
- CAUTION: USE with specified Icom transceivers only. Other manufacturer's transceivers have different pin assignments and may damage the transceiver or microphone if attached.
- DO NOT operate or place the microphone in direct sunlight or in areas with temperatures below -10°C (+14°F) or above +60°C (+140°F).
- DO NOT place the microphone in excessively dusty environments.
- Always place the microphone in a secure place to avoid inadvertent use by unauthorized person.
About CE: The SM-50 complies with the essential requirements of the 2014/30/EU directive for Electromagnetic Compatibility and the 2001/95/EC directive for General Product Safety.
Disposal: The crossed-out wheeled-bin symbol on your product, literature, or packaging reminds you that in the European Union, all electrical and electronic products, batteries, and accumulators (rechargeable batteries) must be taken to designated collection locations at the end of their working life. Do not dispose of these products as unsorted municipal waste. Dispose of them according to the laws in your area.
Specifications
- Microphone type: Unidirectional dynamic microphone (preamp built-in)
- Output impedance: 55 Ω ±30% (at 1 kHz)
- Sensitivity: -30 dB ±4 dB (at 1 kHz, 0 dB=1 V/Pa)
- Power requirements: 5-10 V DC (supplied from the transceiver)
- Cable length (approximate): 1 m, 3 ft 33/8 in
- Weight (approximate): 730 g, 26 oz
All stated specifications are subject to change without notice or obligation.
Part Names and Functions
Front View
The front view of the SM-50 microphone shows a flexible gooseneck supporting the microphone head. On the base, there are four distinct buttons labeled [UP]/[DOWN], [LOW CUT], [PTT], and [PTT LOCK]. The microphone head has three small circles, likely indicating microphone elements or indicators.
- Frequency Up/Down Switches [UP]/[DOWN]: Push to change the frequency. Hold down to change the frequency continuously.
- Low Cut Switch [LOW CUT]: Push to cut out the low frequency components of input voice signals.
- PTT Switch [PTT]: Push to transmit, then release to receive.
- PTT Lock Switch [LOCK]: Push to transmit continuously. The transmission continues until pushing this switch again.
Bottom View
The bottom view of the SM-50 microphone base reveals a circular control knob labeled 'MIC GAIN' for adjusting the microphone's output level. Use this control as an adjunct to the microphone gain setting of the connected transceiver.
NOTE: Rotating the control too far clockwise may result in over-modulation and transmit signal distortion.
Plug Pin Assignments
The diagram shows a connector with pins numbered 1 through 8. The pin functions are:
- 1 Microphone output
- 2 5-10 V DC input
- 3 Frequency up/down
- 4 No connection
- 5 PTT
- 6 GND (PTT ground)
- 7 GND (Microphone ground)
- 8 No connection
Important Information
Icom is not responsible for the destruction, damage to, or performance of any Icom or non-Icom equipment, if the malfunction is because of:
- Force majeure, including, but not limited to, fires, earthquakes, storms, floods, lightning, other natural disasters, disturbances, riots, war, or radioactive contamination.
- The use of Icom transceivers with any equipment that is not manufactured or approved by Icom.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in the United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries.
Icom Inc.
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan
© 2008-2016 Icom Inc.
