This system worked fine until security became an issue because remotes were developed to quickly run through all frequencies in the 300 400 mhz range thus finding the correct frequency to open a given garage door.
Us garage door frequency.
Your garage door is likely using a frequency clustered around the 2 4 ghz band that s been designated the ism band otherwise known as the industrial scientific and.
Electric garage door openers did not become popular until era meter company of chicago offered one after world war ii where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.
It s a good thing we can only hear a limited range of audio frequencies 20hz to 20 000hz because if we did hear everything in the radio frequency range it would drive us crazy.
The purpose of this is to ensure that your garage door opener s frequency doesn t interfere with your neighbor s favorite radio station or the airplane flying overhead.
All work is 100 guaranteed.
Johnson in 1926 in hartford city indiana.
Us garage doors are licensed with the california contractors state license board.
Us garage doors work with top leading brands and products to ensure high quality and reliable work for years to come.
The electric overhead garage door opener was invented by c g.