Radio frequencies have been a critical part of communication and entertainment for over a century. Whether you’re a radio enthusiast, a professional in broadcasting, or simply curious about the invisible waves carrying news and music into your speakers, understanding radio frequencies opens up a fascinating world.
This blog post dives into five specific radio frequencies—98.7, 87.8, 85.9, 90, and 97.6 MHz. We’ll break down their significance, typical uses, and licensing regulations. You’ll also discover tips for exploring these frequencies and a few remarkable examples of broadcasts that have made history.
What Are Radio Frequencies, and Why Are They Important?
Radio frequencies (RF) are electromagnetic waves that transmit signals over the air. These signals make it possible for us to enjoy everything from music on FM radios to mobile phone communication. Radio frequencies are measured in megahertz (MHz) and divided into segments, each with unique applications and rules for use.
FM frequencies, such as the ones we’re focusing on, fall within the 87.5–108 MHz range, commonly used for broadcasting music, news, and talk shows. These frequencies connect vast audiences to information and entertainment key to daily life. But what makes specific frequencies like 98.7 or 90 MHz so interesting? Read on to find out!
Breaking Down the Frequencies
98.7 MHz
This FM frequency is a popular spot for entertainment and community broadcasting. Commercial FM stations often use 98.7 MHz to air music, podcasts, and regional news. Many large cities broadcast hit radio stations or niche genres like jazz or classical music at this frequency.
Notable Example:
Loved around the globe, New York’s 98.7 FM station “ESPN New York” serves as a central hub for sports fans. It offers live commentary, game coverage, and expert opinions, creating an engaging space for listeners seeking all things sports.
87.8 MHz
87.8 MHz, part of the lower edge of the FM band, is utilized less frequently for high-profile broadcasting. However, it’s valuable for low-power stations, experimental broadcasts, and community-driven projects. This frequency is particularly appealing to hobbyists and small broadcasters who want to reach niche audiences.
Notable Example:
Local towns in rural Australia use 87.8 MHz for community radios, helping drive local initiatives while preserving regional identity.
85.9 MHz
Technically outside most FM-radio tuners’ typical range, 85.9 MHz is less often used for consumer broadcasting. That said, this frequency is part of spectrum bands often assigned to public safety broadcasts, aviation systems, or specialized communications. It’s not the go-to for traditional FM entertainment, but it demonstrates RF’s diverse applications beyond just music and talk shows.
90 MHz
90 MHz is a frequency often associated with public radio. Many nonprofit and publicly funded stations, such as those run by universities or educational organizations, broadcast here. These stations often feature cultural programs, classical music, and news analysis.
Notable Example:
NPR (National Public Radio) affiliates often call the 90 MHz range home. With programming that includes in-depth news reporting and enriching arts and culture content, stations on 90 MHz are a treasure trove of information and civilization.
97.6 MHz
Situated near the upper-middle portion of the FM spectrum, 97.6 MHz features a mix of commercial broadcasting and specialty channels. It’s a versatile frequency often chosen for specific formats or blended programming to cater to diverse listeners.
Notable Example:
Stations in this range often play top-40 hits or genre-driven features, like “97.6 Triple You” of Melbourne, which balances cutting-edge pop with indie music for a broad audience.
The Regulatory Framework Behind the Frequencies
Radio frequencies aren’t a free-for-all; specific uses are regulated by national agencies such as the Federal Communications Commission (FCC) in the US or Ofcom in the UK. These organizations ensure frequencies aren’t overcrowded, misuse is minimized, and the spectrum is allocated effectively for various needs.
When it comes to FM radio, stations must adhere to licensing requirements. Hobbyists aiming to experiment with lower-power broadcasts, such as in the 87.8 MHz range, may need special approvals. Some frequencies are protected for emergency services and aviation communication, meaning unauthorized use could have severe consequences.
Tips for Exploring and Experimenting with Radio Frequencies
Radio enthusiasts and hobbyists can legally explore and enjoy the world of RF with the following steps in mind:
- Get a Quality Receiver
Invest in a high-quality radio receiver or software-defined radio (SDR) device. These tools allow you to tune into a wide range of frequencies accurately.
- Research Local Frequency Allocations
Every country has specific laws and allocations for its frequency bands. Research what’s permissible in your area to ensure compliance.
- Experiment with Antennas
A versatile antenna can vastly improve your ability to capture signals. Experiment with designs to boost your reception, especially if listening at the edges of the FM band at frequencies like 87.8 MHz.
- Join the Community
Connect with fellow hobbyists online through forums or local radio clubs. Sharing knowledge and discoveries can make the experience more rewarding.
- Consider Licensing for Low Power FM Broadcasts
If you’d like to create your own broadcasts, explore licensing options for low-power FM transmissions. These allow you to operate within legal bounds while sharing your passion with a local audience.
Case Studies and Historical Highlights
The Rise of Community Broadcasting
Stations operating on 87.8 MHz in New Zealand were instrumental in raising awareness for regional environmental issues. Through a mix of music, town-hall meeting replays, and educational shows, these low-powered stations mobilized action while offering a unifying listening space.
98.7’s Influence on Iconic Moments
Stations like California’s “The Wave” at 98.7 MHz have pushed boundaries by airing exclusive artist interviews and live sessions, strengthening connections between musicians and listeners.
Educational Utilization at 90 MHz
Campus broadcasters on frequencies like 90 MHz revolutionized journalism and creative storytelling by giving students hands-on opportunities to produce content enjoyed by their surrounding communities.
Why Understanding Radio Frequencies Matters
Whether you’re a hobbyist, a tech enthusiast, or a broadcasting professional, understanding radio frequencies like 98.7 or 85.9 MHz enables you to unlock the richness of radio communication. These frequencies connect cultures, entertain us, and sometimes save lives.
