About Walnut Grove Police Frequencies
- 5 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
- 1 conventional channel uses a digital mode (DMR), which needs a scanner that decodes that mode.
- Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 4 talkgroups. A trunking scanner is required, and it must support the system type shown.
- To follow a trunked system, program a control channel first. For Walnut Grove, start with the Gilson site of STARCOM21 Statewide Illinois, about 14 miles away. Its control channels: 851.875, 852.4, 857.2125 MHz.
Knox County channels that also cover Walnut Grove
Dispatch
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Knox County Sheriff Old | Knox County Sheriff – Dispatch (Simulcast SC21 TG 1926) | 155.5350 In 158.9100 | 136.5 PL | FMN | KSC430 |
Tactical
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Knox County Sheriff Old | Mobile Extenders | 151.1450 | FMN | KSC430 | |
| Knox County Sheriff Old | Knox County Sheriff – Alternate | 155.4900 | 136.5 PL | FMN | KSC430 |
Jails & Corrections
| Agency | Description | Frequency (MHz) | Tone | Mode | FCC |
|---|---|---|---|---|---|
| Hill Correctional Center (Galesburg-Knox) [K-29] | Operations | 453.6250 In 458.6250 | 127.3 PL | FMN | WNEB976 |
| Hill Correctional Center (Galesburg-Knox) [K-29] Unconfirmed | Operations | 453.8750 In 458.8750 | 127.3 PL | FMN | WNEB976 |
| Knox County Sheriff | Jail (TG 1/2) | 159.1575 In 153.9425 | CC 1 · TG 1 · SL * | DMR | KSC430 |
STARCOM21 Statewide Illinois
| Agency | Description | Talkgroup | Hex | Mode |
|---|---|---|---|---|
| Knox County Sheriff | Knox County Sheriff – Dispatch (Dispatcher simulcast on 155.535) | 1926 | 786 | D |
| Knox County Sheriff | Knox County Sheriff – Dispatch – Secondary | 1927 | 787 | D |
| Knox County Sheriff | Operations | 1928 | 788 | D |
| Knox County Sheriff | Operations | 1930 | 78a | D |
Nearest trunked radio sites
Distances are measured from the center of Walnut Grove.
Gilson · STARCOM21 Statewide Illinois
RFSS 2 · Site 45 (hex 2D) · NAC 14B · about 14 mi away
Control 851.875, 852.4, 857.2125
Voice 851.35, 855.8625
Andover · STARCOM21 Statewide Illinois
RFSS 2 · Site 39 (hex 27) · NAC 14D · about 14 mi away
Control 852.9625, 853.4875
Voice 852.4375, 858.2125
Kewanee 700 · STARCOM21 Statewide Illinois
RFSS 1 · Site 17 (hex 11) · NAC 140 · about 15 mi away
Control 774.34375, 774.78125, 775.09375
Voice 770.96875, 773.04375, 775.30625, 775.55625, 855.9375, 856.3375
What do these numbers mean?
- Control channel
- The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
- Voice
- The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
- Site
- One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
- RFSS (Radio Frequency Sub-System)
- A group of sites run by the same controller. Large Project 25 systems can have several.
- NAC (Network Access Code)
- A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
- Talkgroup
- A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.