On open rural land with good antenna height you can expect 25kW EIRP to reach 170km, maybe a little more. In a dense city like New York with tall buildings made of steel and concrete, this would cause great attenuation to the signal and reduce the coverage area by 10 times, you could expect only a few miles. So, the transmission distance really depends on many factors. If you send us the GPS coordinates of your antenna site and the antenna height, we can make a plot of you using satellite elevation data of where the signal can be received. We have a great example of this HERE
To achieve 25kW EIRP only 2kW of transmitter power is needed if the correct antenna is installed with high grade coaxial cable. The 2kW of transmitter power comes from 2 separate 1kW amplifiers that are driven by a distribution amplifier and Veronica® 1W PLL driver. All our big systems above 10kW EIRP are configured this way using more than just a single 1kW amplifier. Due to this a complete shutdown or signal failure can only occur if the 2 amplifiers (1kW each) go down at exactly the same time, this is nearly impossible with super high odds. So if you need system reliability and a station on air, always, with no breakdowns, 2 or more if possible, 1kW amplifiers are perfect.
The 100KW, 50kW, 25kW, 12.5kW and 10kW all use this same 8 way folded dipole broadband antenna. The simple reason is, because it's simply amazing. It has high bandwidth with an SWR or less then 1.2 from 87.5 to 108 MHz, most dummy test loads struggle to manage this. Many coaxial cable lengths, especially the cheap Chinese rubbish struggles to maintains less than 1.2. So this is the reason this antenna is gold, metaphorically speaking, made out of aluminum and stainless steel. I forget to mention, it does not rot or corrode even in coastal areas. But most important, it MAGNIFIES the signal radiating to the horizon by over 15 times !!!
As an optional extra this transmitter is available with dynamic and programable RDS fitted. If you want RDS option please ADD TO CART above
|1||FM Stereo Driver with Audio Processing|
|1||Distribution Splitter Amplifier|
|2||1000W FM Power Amplifier|
|2||LMR600 40m /131ft Cables|
|1||All Other Connecting Cables|
|8||Broadband High Power Folded Dipole Antenna with Tower Mounting Clamps|
The coaxial antenna cable used on this system is LMR600. This is super low loss with only -1dB of loss over 40 mt (at 100 MHz). This is the reason that most of the power developed by the amplifiers is transferred with ease to the huge gain antenna stack. The cable is robust but at the same time flexible with an external diameter of about 13mm / 0.5 inch. Both ends of the cable are fitted with high powered Teflon DIN7-16 connectors.
The FM signal starts in the internal Veronica PLL which produces the super low noise and highly stable FM signal. You can find more info on this at in our 1W Exciter (PLL driver). Then the internal stereo coder and audio processor boards provide a loud and crisp audio signal on the listeners radio. If your more of an expert, you can if you want use an external processor such as Orban, Inovonics or PC generated MPX/RDS, the limiter and stereo coder we supply can be completely disabled.
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.
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
This graph is based on average customer reports in some directions. Basically this shows the typical ranges really ever recorded. Most of the reports were radio station listeners that phoned, texted, WhatsApp etc. into the radio station programs operated by our customers. Range is very difficult to predict as there are many factors that effect it. More info on FM Transmission Range