ping I re-examined your situation and believe you should carefully investigate the Yagi antenna you have. The lactic acid bacteria Yagi is a three-element Moksen Yagi, with a gain that should not be less than 6dB. A 90cm long car antenna and a 1.2m glass fiber antenna also have a gain of only 5.5dB. Therefore, it's important to first determine whether the Yagi you have is functioning correctly, including its correct orientation and whether it's pointing in the right direction. The orientation of the Yagi is very important.