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1kW EIRP Complete FM Radio Transmitter Broadcasting System
How Far Will 1kW Reach?
Reports vary on 1kW EIRP range, some customers claim up to 90km, others 60km. It's largely dependent on if the two way stacked antenna is 1. on a pole on the top of a building roof or 2. more professionally installed on the side of a large tower. More on FM Transmission Range
250W FM Stereo Transmitter
The crisp clear FM signal starts in this unit which provides 250W super clean output in stereo with audio processing and limiting. For a small, but with a need to be quite powerful radio service, a big town for example, this transmitter is just the ticket with everything required included. More info on the 250W Transmitter
The Aareff 'Plug-and-Play' Advantage
| System Component | Engineering Specification | Broadcaster Benefit |
|---|---|---|
| 1W FM Exciter | Internal Veronica PLL Driver | Ultra-low noise, high stability, and zero frequency drift. |
| Audio Processing | Integrated Limiter & Compressor | Prevents illegal over-modulation while ensuring loud, crisp audio. |
| Dynamic RDS | Fully Programmable via USB | Displays your Station Name and Artist info directly on car radios. |
| Antenna & Cable | 0dB Dipole + 12m RG58/CU | 1:1 match guarantees exactly 1W EIRP radiation (No tuning needed). |
Integrated Dynamic RDS (Radio Data System)
RDS is now included on all stereo transmitters with audio processing. RDS shows your station name and more scrolling across the car radio display.
This RDS is not just ordinary RDS, it is fully programmable dynamic RDS. This means the transmitter can be connected to a PC by a USB cable. The transmitters RDS circuit can be programmed to pick the Artist and Song name from any folder on the PC disk drive. This folder is easy to set up in the DJ playout software, like Zara Studio etc.
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Do You Have A Question?
PACKAGE CHECKLIST
| Qty | Description | Item |
| 1 | 250W FM Stereo Transmitter with Audio Processing |  |
| 1 | LMR400 30m / 100ft Cable |  |
| 4 | Standard FM VHF Dipole |  |
| 2 | Interbay Cables |  |
| 3 | RF Splitter Boxes |  |
| 4 | Mounting Clamps |  |
|
LIMITED WARRANTY |
4 Way Stacked Dipole +7.8dBi
Using the 250W transmitter with this antenna and 30m of cable produces a radiated power of 1kW EIRP, it's that easy. This antenna is broadband and will operate with an SWR or 1.5 or less between 87.5 and 108 MHz. More info on the 4 Way Stacked Dipole
1kW Maximum FM Transmission Range Chart: Real-World Listener Data
Understanding Typical Broadcast Coverage
The following range chart is derived from real-world customer reporting, providing a reliable baseline for expected broadcast coverage. This data reflects the typical distances recorded by professional and community stations utilizing our 1W EIRP systems.
- Data Source: Based on average customer signal reports across various geographical environments.
- Verification: Reports are compiled from direct listener communication (phone, text, WhatsApp) to radio stations operated by Aareff customers.
- Zero-Failure Promise: Because this system is perfectly impedance-matched (1W Transmitter to 0dB Dipole), it ensures exactly 1W EIRP is radiated, maximizing range without equipment strain.
It is important to understand that FM transmission range is influenced by numerous variables (e.g., terrain, antenna height, atmospheric conditions, local noise floor). For a detailed breakdown of the factors affecting signal propagation, refer to our dedicated guide on FM Transmission Range.
FM Stereo & Processing: Loud, Crisp Broadcast Quality
The Veronica® system is engineered to deliver a high-impact audio signature. Whether you rely on our internal high-performance processing or your own external rack equipment, our architecture ensures absolute signal integrity.
| Processing Stage | Technical Advantage & Function |
|---|---|
| The Signal Foundation | Utilizes the renowned Veronica® 1W Exciter. This PLL-driven foundation prevents frequency drift and ensures a super-low noise floor for professional carrier integrity. |
| Internal Audio Chain | Includes an Internal Stereo Coder for wide separation and a Dynamic Audio Processor. These boards apply precise limiting and compression to deliver a 'loud and crisp' commercial sound. |
| Professional Bypass | Engineered for flexibility. The internal limiter and stereo coder can be completely disabled to accommodate external processors such as Orban, Inovonics, or PC-generated MPX/RDS signals. |
| Chief Engineer Control | Allows the station's engineering team to maintain their specific 'processing signature' by providing a transparent path for the external MPX baseband signal. |
DECLARATION OF CONFORMITY
European Union
We hereby declare that this equipment complies with;
• ETS 300384 European Telecommunications Harmonised Standard when used with an audio compressor limiter supplied and tested by Aareff
• EN 301489-11 V1.3.1 (2006-05) EMC Electromagnetic Compatibility when used with 1 meter AC mains cord supplied. If the installation engineer needs to extend this cord, this and the audio input cable should be no more than 3 meters in length to remain in compliance with EMC directive.
• 2006/95/EC Directive (2006-12) LVD Low Voltage Directive.
Equipment compliance is possible using equipment from and in conjunction from other manufacturers, but since this is beyond the control of Aareff Systems, Aareff Systems cannot or be expected to guarantee compliance in this situation.
United States
The following list are the FCC technical requirements for FM broadcasting. We confirm and verify that this transmitter complies with the technical requirements.
47 CFR Chapter I Federal Communications Commission sections:
• 73.1560, 2.1046 RF Power
• 73.1545, 2.1055 Frequency Stability
• 73.317, 2.1049 (e)(3) Emission Limitation, Emission Mask
• 73.317, 2.1057, 2.1051 Emission Limits, Spurious Emissions at Antenna Terminal
• 73.317, 2.1057, 2.1053 Emission Limits, Field Strength of Spurious Emissions
