Wogster
Thanks for the info but my thrust was the misleading advertisement of this "jagi" antenna with directors, a total of 5 plastic, useless pieces. A normal antenna of this size would have about 6 to 9 dB gain, then this can be amplified to overcome cable loss or insensitivity of the frontend tuner. The basic folded dipole has 1.5 dBi gain, not very much to amplify.
I will stick to directive/gain antenna with known rf patterns and if needed add the external mast mount amplifier with required gain & noise figure (2 dB at least), cheap amps are 5dB noise figures and not too good on weak signals.