Power over Coax?

I have some CCTV cams with ground loop issues and isolators aren't helping. I'd like to move the power supplies back to the video switcher's power circuit.

I have existing RG-6 runs.

Is there an injector/pick-off pair of adapters available? I'm having no luck with search. Maybe using the wrong terms.

TIA!

This company turns up a lot on searches:
http://www.cocoontech.com/portal/articles/news/42-events/480-isc-west-2011-exclusive-update-miscellaneous-display-booth

no idea on cost though... but it should be doable. Satellite sends power for the switches over the coax; and the old school antenna rotators used to send power for the motor over the coax - so it should be pretty doable.

Yes there are ways to do it. As Wrok2Play said they do it all the time with satellite.

here is one example I could quickly find http://www.atvresearch.com/vap-1000power-up-coaxadaptors.aspx

mustangcoupe said:

Yes there are ways to do it. As Wrok2Play said they do it all the time with satellite.

here is one example I could quickly find http://www.atvresear...axadaptors.aspx

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I used to have DirectPC in my old house and disconnected the RG6 while it was plugged in and it arced. So I would say not only is it possible over RG6 but you can send significant voltage over it for a decent distance (50+ feet).

Thanks guys. As I suspected, my search phrasing was bad. I buy stuff from ATV Research and will go that way.
I knew it had to exist. Years ago, I used Radio Shack coax-powered RF amps to boost antenna reception.

I recall using a special splitter for the sattelite lines that let you merge in a standard antenna signal. I believe the thing that was special about them was the power pass-through versus no pass-through on the different connection terminals. You might be able to use those in reverse to merge power on then take it off at the other end. You would need to do more research on that as I am speaking from memory on something I did once 10 years ago.

Edit: this is what I was talking about. http://cgi.ebay.com/TWO-DIPLEXER-SPLITTER-COMBINE-CABLE-TV-SATELLITE-SWITCH-/380335179054?pt=LH_DefaultDomain_0&hash=item588dbe452e

It appears that this should allow you to merge power on to a coax and then pull it off at the other end.

I'm not sure how well a CATV coax power injector will work with a composite (baseband)video signal. which is what CCTV is. You may want to look further in to this before possibly burning up a camera or worse, a DVR input.

gatchel said:

I'm not sure how well a CATV coax power injector will work with a composite (baseband)video signal. which is what CCTV is. You may want to look further in to this before possibly burning up a camera or worse, a DVR input.

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You will need to block the signal at all locations including the end of the run.

For $7 I would say it is worth giving it a try. Plug it all up but don't attach the camera or dvr. Then test for any voltage leaking out.

Understand and appreciate your suggestions and concerns and am evaluating.
Since I already have the quad shield installed with existing holes, I have options.
Landscape lighting 2-conductor wiring carrying the cams' 12 VDC would fit thru the exiting holes.
The AVI Research solution. I can phone him but it looks like line level/baseband compatibility to me.
CAT5E baluns with POE (I have one but haven't tried it). This would also fit thru the exiting holes.

depends on the device you hooking up. If you use the device has 10/100 baseT speed, the pair 3+4 are not used. So you can use pair 3 and 4 for sending power by making a special cable youselves.