I was doing Lighting Control.

I was doing Shade Control.

Somebody else was doing A/V.

It's all there in my post for you and everyone else to see.

Apparently you are a tad illiterate, but I accept your apology in advance.

The standard CCS (copper clad steel) coax (RG6 or RG11) works just fine because it is carrying an RF signal over the center conductor. (it's got some "Skin" in the game - look it up)

Once you try to distribute a Baseband Signal (like component video, composite video, S-video, or any type of "X-over-Coax") the CCS center conductor is a problem.

Take CCTV for example. It's typically run over RG59. But the type of RG59 is not CCS but rather solid copper. Did you ever wonder why CCTV cameras and recorders use BNC connectors (named after the two geniuses who invented this wonderful bayonet connector - Neill and Concelman)? Well, as you know, copper is soft and doesn't work well with an "F" connector - it bends.

I suspect you were in such a hurry to state this basic fact that all of us should already know, that you forgot to add an important qualifier: this is true for all signals above about 5 MHz. A non-technician would be told it's true for all cable company and antenna signals (not quite true, but close).

Yes. The signal is no longer all on the skin, so some of the signal goes over the skin at its velocity, while some goes through the steel, which has a higher resistance and lower velocity of propagation... so some of the signal is delayed at the other end. "Can be" is the literal truth, but "can be" is enough to disqualify it from EVER being used for these signals.

Here you're a tiny bit off the beam. CCS RG6 is made so that cable company drops won't stretch over short distances, since the steel will keep them from stretching. (Over longer distances, an additional wire [called a "messenger"] is siamesed onto the RG6 to provide more structural support.)

Sorry, but no. It's because BNCs were used in situations where they might need to be removed, but had to be very secure. This was firstly in the lab.Also, the center conductor of the BNC connector could be gold crimped to RG59's copper for a connection to the socket better than you'd get with copper.

Is the center conductor of RG59 too soft to work well with F connectors? No. Before I switched ALL my FM and TV antenna systems to RG6 in 1985, all my systems used RG59. After all, at that time we didn't really care much about UHF, so it was not yet cost-efficient for us to use RG6.

Anybody want to buy a few hex crimp F connectors for RG59? I still have a few around somewhere. They were DEFINITELY used for antenna system wiring!

But these are not baseband signals you would be trying to transmit through a coax in an HDMI extender are they? Just like they are not baseband signals being sent through Cat6 HDMI adaptor. Why can't an HDMI extender manufacturer create a codec as fast as a cable company who can change boxes at any time?

I was able to cut sheetrock and/or chip out 75' of plaster, install Cat6, patch, paint and throw a house warming party faster than i could have read all the posts in this thread.

Come on man. Self flagellation is what we do.

You should have ran fiber