The Mercer Island Radio Operators (MIRO) is the volunteer team that provides auxiliary technical and communications support for the City of Mercer Island and its Police and Fire Departments in the event of natural or man-made emergencies.
MIRO operates under the authority of the City of Mercer Island Department of Emergency Management and reports directly to the City’s Emergency Manager, Amanda Keverkamp at 206-275-7795 or amanda.keverkamp@mercergov.org.
MIRO is one of several Emergency Preparedness volunteer teams on Mercer Island, and not a “ham radio club”.
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Meetings
Emergency Practice Net: Second Thursday of the month at 7:00 PM
The net is conducted on the MIRO VHF repeater frequency of 147.160 MHz positive offset tone 146.2 Hz. The check-ins are by assigned neighborhood region. After announcements the net shifts to the UHF repeater 440.150 MHz positive offset tone 103.5 for a role call of those who have checked in on VHF. The purpose is to practice shifting frequencies.
In the event of a repeater failure, the net will switch to the simplex frequency of 147.440 MHz.
Monthly Meeting: Third Thursday of the month at 7:00 PM
The MIRO meetings are typically held at Mercer Island Fire Station 91 at 3030 78th Ave SE.
All MIRO members, prospective hams, and visitors are encouraged to attend. The monthly MIRO Newsletter will specify meeting location and subject.
Repeaters and Operating Frequencies
| 2 Meter Repeater (VHF) | 147.160 MHz, +0.6 MHz offset, 146.2 Hz tone, Narrow band (NFM), EchoLink W7MIR-R |
| 70 Centimeter Repeater (UHF) | 440.150 MHz, +5 MHz offset, 103.5 Hz tone, Narrow band (NFM) |
| 2 Meter Simplex | 147.440 MHz |
| 2 Meter Simplex | 146.600 MHz |
| 70 Centimeter Simplex | 445.900 MHz |
| 70 Centimeter Simplex | 445.925 MHz |
MIRO Winlink Support
SYSOP: MIKE SEDGWICK K7PI – bipi@comcast.net, Cell phone: (206) 228-1792
Effective May 2025
RMS Gateways
| Frequency (MHz) | Data Rate/Baud (Mode) | Callsign-SSID | Antenna | Location |
|---|---|---|---|---|
| 145.030 | 9600 (VARA FM Wide), 1200 (Packet FM) | W7MIR-10 | Vertical | Water Reservoir |
| 430.825 | 9600 (VARA FM Wide), 1200 (Packet FM) | W7MIR-11 | Vertical | Water Reservoir |
| 144.950 | 9600 (VARA FM Wide), 1200 (Packet FM) | W7MIR-12 | Vertical | Fire Station #92 (South End) |
| 144.950 | 9600 (VARA FM Wide), 1200 (Packet FM) | W7MIR-13 | Vertical | Fire Station #91 (North End) |
| 145.030 | 9600 (VARA FM Wide), 1200 (Packet FM) | W7MIR-14 | Vertical | MICEC (Mercer Island Community Center) |
Station Addresses
| Winlink Address | Location | Phone Number |
|---|---|---|
| W7MIR@Winlink.org | Radio room at MICEC (Mercer Island Community Center) | (206) 275-7875 |
Note: Winlink transmitted or destined messages require “//WL2K” in the subject line to avoid being screened out by the Winlink Spam filter.