Originally Posted by rastan
I believe any true 75 ohm video cable /component video cable constructed of RG-6 should be able to handle 1080p (I believe even RG-59 is spec'ed to carry 1 GHz). They may not be spec'ed as such, but RG-6 can more than handle 150 MHz. Cheaper cables usually use smaller wire guage so that would affect the bandwidth they can carry, but a good component cable, not necessarily an expensive one (Monoprice makes some very good ones that are reasonably priced), should be able to transport full 1080p.
You validate my point... the generalizations made in your statement are incorrect assumptions on all counts. And let me just clarify, I'm not one of them "cable snobs" you find in places like this. I'm just a bit more educated on the subject and what you're saying isn't correct.
There is nothing that specs a RG-6 or RG-59 for any bandwidth. Some can handle 20MHz, other 1GHz, and others 3GHz. This all depends on what the manufacturer wanted. RG-59 and RG-6 are very similar, but different. RG-6 most likely has aluminum braided and foil shileds, and larger components, usually rated for higher frequencies and longer "outdoor" uses because of the construction, conductor, and shielding. RG-59 lacks the extra shielding, but uses different shielding material. It does come in extra shileded flavors (as does RG-6) but RG-59 is thinner and more flexible and better for indoor use, at shorter distances.
Many of these cables can pass HD signals, but you can't make a generalization about any cable like that. Even worse, judge by the cable thickness. If you really believe what your are saying you'd be happy to use the coax-R-W-Y coax AV cables in place of the R-B-G coax component cables. You can't just judge a cable by it's name or size. Every cable from a manufacturer has its own specs. Belden alone must have 80 RG-6, and as many RG-59s. Each cable (not type) had its own electrical, shielding, and signal charastics. If you've studied electronics you know this. There are so many different flavors of cables, just searchhttps://edeskv2.belden.com/Products/#s=RG-6&r=0https://edeskv2.belden.com/Products/#s=RG-59&r=0
This is just one manufacturer!
Belden does list the sweep tests for each cable, I did find tha most RG-6 were 5MHz-1GHz, with one going to 4.5GHz. Most RG-59 were listed 5MHz-3GHz.
But, you can see the aren't all the same based on RG-59 or RG-6.
And yes, there are "cheap" cables that perform as well, or better than some of the expensive counterparts. Again, every cable is unique and you gotta know the specs of the cable before you buy. You can do sweep tests yourself, if you have access to the equipment and see with your own eyes. I know those crapy pack-in compoent cables aren't much better than the AV coax cables, but many people think that because they have the G-R-B caps they are all the component cable they will need, but I'm only happy to use those for analog audio.