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Search: Posts Made By: ADTech
Forum: Help With Reception 11-Nov-2014, 1:56 PM
Replies: 8
Views: 5,996
Posted By ADTech
Many commercial door openers back in the day used...

Many commercial door openers back in the day used X-band radar for motion sensing. Used to set off the radar detector from a 1/4 mile away from supermarkets and the like.

I haven't used a...
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