I had a problem at first when I discovered the device required 12vdc from a cable box which I didn't have so I called King and was told I could Buy a King 12V DC power supply for a small fee. It only took me a few days to get 12V DC, but when I plugged in 12V DC the device still didn't work. Then I pulled out my trusty multimeter to check that the 12V DC power supply was faulty and not producing any power at all. I then called King to send a replacement 12V DC power supply. After receiving this power supply I connected it to my King Premium antenna (OA8501) and am now quite happy. It does a great job even though I'm quite a distance from cities like Philadelphia, Pennsylvania, Baltimore, Maryland, or Vineland, New Jersey. Delaware has nothing of its own. Anyway, thank you king.
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