Hi. i am new to sdr. i am trying to find my local emergency sirens frequency. i know from the manufacturer that it can be either UHF or VHF activation via DTMF codes. now, this is the yagi antenna mounted on the siren its self. dose it Looks like its tuned to UHF or VHF? trying to get a Direction where to scan...
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In which country or state do you live? You can try to figure out what horns are used, what their size it is and determine the yagi element sizes. Then use an online yagi calculator to find out the frequency.