i'm doing a 84 security camara in dominican republic. i've been presently problem with the BNC conection because the video signal from the computer always get loose or tight enough. i would like to know if there is any way that i can use any other conector than BNC to work more effective. thank you

sounds like you are using twist on connectors or the cable you are using is cheap/thin.

you can use compression or crimp conectors...............