Is an amp?

Hello,
Difficult to give a favorable opinion. Is it due to a possible defect in the received model?
Whether output or community antenna (especially not recommended): the result is zero or worse. I have an excellent signal reception in individual and even lemployant in the other direction (I thought of an error made in this article) connection: Nothing! No improvement, no signal worse!
Either I am a black cat, or an ignoramus sat in transmission or ...