Scanner Information

Frequency Information:

Fire Departments in McHenry County have transitioned from their Analog VHF systems to the Starcom21 Statewide Illinois network, which spans across Illinois and some parts of Iowa. The technology uses a more well known digital system called Project 25. By being on Project 25, specifically Starcom21 Statewide Illinois, our departments can travel to any location in the state and their radios will still work not only with local dispatch, but also other agencies.

Click here for a full list of Starcom21 frequencies and talk groups

Click here for a full list of other frequencies in McHenry County

Click here for more information about Starcom21 Statewide Illinois

What We Monitor

Channel DescriptionFrequency / Talk Group
McHenry County Control Frequency:851.7375 MHz
Fire South QuadDispatched by SEECOM
Huntley Fire Dispatch:1179
Huntley Fire Ops 1:1180
Algonquin-LITH Fire Dispatch:34107
Algonquin-LITH Fire Ops 1:34153
Crystal Lake Fire Dispatch:34108
Crystal Lake Fire Ops 1:34155
Fire North QuadDispatched by MCSO
Fire North Dispatch:1143
Fire North TAC 1:1145
Hebron FPD Ops:1147
Richmond FPD Ops:1148
Spring Grove FPD Ops:1149
Wonder Lake FPD Ops:1150
Fire West QuadDispatched by NERCOM
Woodstock Fire:154.13 MHz
Marengo/Union Fire:155.5725 MHz
Harvard Fire:155.5575 MHz
Fire East QuadDispatched by NERCOM
Fire East Dispatch:34655
Fire East Ops 1:34656
Fire East Ops 2:34657
Fire East Event 1:34658
Fire East Event 2:34659

Device Information

Analog scanners and many early digital scanners do not work on this system as it is very complex. A P25 Phase II Simulcast compatible scanner is required for this system. The downside is that these scanners are very expensive (The Uniden SDS100 is $650). However, there is an affordable solution! Our scanner is provided by several $30 RTL-SDRs which when paired with a computer, can "show" the computer the RF signals coming over the air. A free program on the computer called SDRTrunk then converts that digital signal from the control frequency, and can simultaneously monitor all active voice channels. This program then pushes each individual "call" to the Broadcastify Calls platform, as well as the respective Broadcastify Stream. The setup is relatively technical however the documentation on the SDRTrunk wiki is pretty helpful to get started!

Starcom21 Map