CVBS security cameras causing interference

[snackattack]

Hi All,
I am pretty new to the hobby of ham radio and I am looking into building a dipole antenna for the 20m ham band and a few questions have come up while surveying where to build it.
First, will running the antenna almost perpendicular to and on top of an old style CVBS camera cable cause any interference to the radio while recieving?
Also, will transmitting at 100 watts on the antenna interfere with the camera or damage it? The cable used seems to be unshielded and also carries a power wire for the camera. Is it worth rerouting the camera cable?
Finally, I was also wondering what the minimum spacing between the antenna and a parallel power line should be.
This antenna is around 35 feet long and the camera cable is a similar length going at a 60 degree angle across the antenna.
Thanks in advance.

 

[Ubbe]

Anything electronic can generate interference and a cable attached to it, that doesn't have decoupling capacitors and chokes, will act as an antenna.

I have a surveillance camera on ground floor that generate a 148.500MHz signal and sidebands that I receive from a roof antenna and I was out on my yard trying to direction find it and ended up at my own window with the camera behind it. I pulled its power and the interference where gone. I have one 445.500MHz with the same type of interference with sidebands that comes from own main work computer.

With all the electronics that exists in a home today there will always be a risk of getting hit by your own, or a neighbors, RFI signals.

/Ubbe

 

[kb5udf]

I think you can get a reasonable Idea of your first question with a little testing inside the shack. Hook up some coax to your HF rig connect it to any kind of antenna you have or no antenna (but don’t transmit obviously). Put the coax from the HF rig on or near the cable(s) for the camera and power up the camera and check your reception.