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Strategic Technical Planning for Broadcasters
 

 Headlines:

Effective date April 10.
2016 window translators may be moved again.
2017 has arrived, and with it the promise of new FM translators for AM stations.
LED tower lights can save money on power, but many are invisible to the Night Vision Goggles used by the Coast Guard, civilian operators like Medevac helicopters, and the military.
Save some birds, save a little money - but only if your tower is at least 450' tall.
In its Rural Radio proceeding (MB Docket 09-52), the FCC placed new limitations on community changes. A recent release clarifies some of this.
Want to change your station's community in order to do an upgrade? You must read this.
Many FM broadcasters may benefit from the ongoing downgrades of under-height Class C stations.
With the digital conversion of broadcast television, many stations in the NCE reserved band below 92 MHz may upgrade their facilities.
New power to visualize FM upgrade potential.
The FCC now allows two-step minor-change upgrades and relocations.

LED Tower Light Warning

Oct 15, 2013
LED tower lights can save money on power, but many are invisible to the Night Vision Goggles used by the Coast Guard, civilian operators like Medevac helicopters, and the military.
LED tower lights can save money on power, but many are invisible to the Night Vision Goggles used by the Coast Guard, civilian operators like Medevac helicopters, and the military.

Here's why:

Going all the way back to Edison, incandescent lamps have created light by heating a filament to a high temperature. Visible light is only a very small portion of the energy emitted by the lamp, and most of the energy is given off as heat in the Infra-Red (IR) spectrum.

Night Vision Goggles (NVGs) are tuned to look for heat. They use very sharp optical filters to eliminate energy in the visible spectrum and focus on IR.  This works very well with traditional incandescent lamps.

Enter the highly efficient LED. An LED can be designed to emit in any desired optical or IR band.

The typical tower LED light is an array of LEDs that provides visible energy concentrated in a very narrow band that the eye perceives as red, and almost no heat.

Because LEDs give off minimal heat, NVGs do not see them.

The ideal solution is to mix into the LED tower light array enough IR-emitting LEDs to make the light reliably visible to NVG users. Some manufacturers are already working toward this goal.

But if you have already equipped your tower with LED lighting that doesn't include IR emitters, what are your options?

Some manufacturers have introduced separate IR emitters that can be added to your tower.

It may be possible to re-fit your tower with temporary incandescent lamps.





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