From Phil Stenholm:
Another look into the History of the Evanston Fire Department
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KSC732 IS ON THE AIR!
In June 1952, the Evanston Fire Department made a significant leap forward by purchasing two-way FM radios for $13,000. These radios were installed in all fire stations and on most EFD vehicles. The funding came from a 1951 bond issue, but the system faced some early challenges with interference from a local taxi company’s radio signals. Fortunately, the issue was quickly resolved by engineers from Motorola working on the project.
The introduction of the radios led to the adoption of the 20-series numbering system in 1952. This change helped avoid confusion with other nearby fire departments that shared the same frequency. For example, Engine 1 became Engine 21, Truck 2 became Truck 22, and so on. A new pumper/rescue unit was designated as Squad 21. Chief Henry Dorband used the call sign “F-1,†which he had previously used on the police department’s frequency after receiving a two-way radio-equipped car in 1951.
The Evanston Fire Department shared its frequency with several neighboring departments, including Wilmette, Winnetka, Northfield, Glencoe, and Highland Park. Unlike the Chicago Fire Department, which used repeaters on its frequencies, the suburban departments did not, leading to occasional interference between transmissions.
In 1951, the Evanston Police Department received the FCC-assigned call sign KSA580 for its base station. The Fire Department followed suit in 1952 with KSC732. The main station, located at Station #1, was known as “KSC732 – the desk.†Stations #2 through #4 had call signs KSC733, KSC734, and KSC735 respectively. Station #5, which opened in 1955, was assigned KSD841.
Daily radio tests were conducted at 8:00 AM and 8:00 PM. Each station had to confirm receipt by stating its call sign. If units were out responding to calls, the test could be delayed or canceled during major incidents.
Company officers were responsible for tracking the status of their counterparts. For instance, the officer of Engine Co. 24 needed to know if Engine Co. 23 was in service, as this could affect response areas. Changes in status were acknowledged over the radio, often using the station’s call sign or just the last three digits.
Initially, both police and fire radio consoles were located on the second floor of the police station, near the stairway to Fire Station #1. Later, they were moved to the first floor, closer to the police complaint desk and farther from Station #1.
Communication operators, who were civilian employees under a police sergeant’s supervision, split their pay between the police and fire departments. Before 1975, these roles were held mostly by men, often retired officers or firefighters. Good memory, clear speech, and multitasking were key skills—typing was not required.
All fire calls, inhalator alerts, and details were broadcast over the EFD radio. Operators announced emergencies like fires, automatic alarms, car or trash fires, while a firefighter at Station #1 handled non-emergency calls such as lock-outs, gas checks, or odor investigations.
A unique four-second horn tone was sounded before any emergency call or daily test. It was activated by a button similar to a doorbell and couldn’t be stopped once started. It would cut through any ongoing conversation. Only two buttons controlled it—one in the police room and one at Fire Station #1’s desk.
Operators didn’t assign companies to calls. Instead, they announced the type and location twice, then gave the time and call sign. The radio would then become a conference line. Responding companies were expected to acknowledge, and the platoon commander ensured the right units responded.
This old-fashioned dispatch method, dating back to 1952, remained in place until 1982!
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