Wireless RF Coaxail

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cbarronx23

New DJ
Dec 12, 2006
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I'm doing a gig for a school who's celebrating being on the news. They want to have me put the live feed up on my projector when it airs, about halfway through the party. The problem is that the closest spot in the building with cable is the office.

Now, I know that there are kits out there that enable you to send Coaxail video signal wirelessly. I am curious to know, however, if anyone has expierience with any of them.

Please Let Me Know A.S.A.P.

Thanks,
Chris B.
 
If nothing else discuss it with the local cable company. Many of them do in-house installation work such as this for free or darn cheap. There might be cables running right by your location, just not tapped -- never know.
 
awdj said:
If nothing else discuss it with the local cable company. Many of them do in-house installation work such as this for free or darn cheap. There might be cables running right by your location, just not tapped -- never know.
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Thats the way I would do it. I know the local cable company here would run the wire in a house for $19.00 and if you told them its for a school you might get it for free

And even though you didnt ask....:sqrolleyes:

I would record the live feed for playback later on also
 
As for the wireless 2.4 gigahertz transmitter/receiver units, they will work well up to about 150 feet as long as you have a clear line of sight between them. Forget about through the wall, people etc. they will fade in and out.

I use them from time to time they don't like blockage of any type.
 
Yes, check with the schools cable provider - they will probably give you a solution.

But hey - a 1000' spool of RG6 and an RF DA are both relatively cheap.
 
for the price of a rental of a wireless solution, you'd prob be better off with the raw cable then putting BNC ends on 'em (BNC's are professional grade connectors) then all you will need is some bullets or BNC to composite adapters.
 
Remember KISS!

If you have to do it yourself -

Regardless of what is a “pro” grade connector you need to connect to what exists on each end. If it is a cable TV install, it will be a male F connector. The RF input on the cable box will be a female F connector. For a temporary connection (in the office) get a F female-female connector to connect to the cable you remove from the back of the cable box. Run your cable and put a male F on both ends and hookup the cable box. In all likelihood there will be RCA jacks on the back of the box for the video and audio or maybe an S-Video DIN connector. Just be sure you have the right adapters to get from their cable box to your gear.

You will most likely be able to get away with RG-59 cable which is cheaper. The RG-6 is a more robust cable that will pass up to 2 Ghz which is necessary for satellite dish connection to the LNB. It will not hurt to use the RG-6 but if you need to save a buck and have no intention to reuse the cable, RG-59 will get you by especially if you aren’t going to run 1000'. The F connectors for each are different diameters so be sure you have the right ones for the cable you bought.

You will not need a distribution amp because this will be a temporary connection. You’re not adding ports, just temporarily moving one. Besides, the RF signal is most often at a much higher amplitude than is usually necessary. An inexpensive splitter is all that is necessary in most cases if you were going to add cable outlets.

Don't forget the gaffer's tape to eliminate the tripping hazards.
 
Think outside the box on this one. There's really no reason that you need to show the event as it happens. Simply setup a VCR to record the broadcoast in the office. Once it's over, bring the VCR to your room and hook it to the projector.

Does it really matter if it's live or 5 minutes later? Also, there's no need to buy ANYTHING this way.
 
Daa???

Daa? Do you think that might work? Just say it's live? Fib a little, its cheaper.

It isn't the same thing if people are on the cell phones asking if they're watching it now. Still it is a simple attractive and cheap solution.
 
Balanced Line said:
You will most likely be able to get away with RG-59 cable which is cheaper. The RG-6 is a more robust cable that will pass up to 2 Ghz which is necessary for satellite dish connection to the LNB. It will not hurt to use the RG-6 but if you need to save a buck and have no intention to reuse the cable, RG-59 will get you by especially if you aren’t going to run 1000'. The F connectors for each are different diameters so be sure you have the right ones for the cable you bought.
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You are correct in that the diameters are different -- however -- I have NEVER seen RG-59 cheaper. It's usually two or three times more, in fact. RG-6 runs around $45-50 + shipping usually, for 1000'.

RG-59, without double-checking, runs around $150-200 I believe.
 
I stand corrected

awdj said:
You are correct in that the diameters are different -- however -- I have NEVER seen RG-59 cheaper. It's usually two or three times more, in fact. RG-6 runs around $45-50 + shipping usually, for 1000'.

RG-59, without double-checking, runs around $150-200 I believe.
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I did a quick check to see what deals I could find. The prices I found were closer to $100/1000' for the 59 and $80/1000' for the 6. None the less you are correct. I haven't had to buy this stuff in many years. Back when I did the RG-6 was more expensive. It may be the combination of material and volume. The RG-59 is usually if not always copper braid in addition to a copper center. The RG-6 is an aluminum foil and braid, only the center is copper. Copper has gone up dramatically. RG-6 has become very common so it is no longer the specialty item it once was.

Thanks for the info.
 
well, the gig was the 21 of april, so heres what happened.

i offered to come by the school the day before and see what I could do. I put traced the cable line to a service room, and found that the way it went out to the street, it ran through the wall in the gym. sooo, I pulled off a power outlet cover, did some fishing, found the cable line, and tapped into it. then plugged the cable box in and all went well.
 
Balanced Line said:
It may be the combination of material and volume. The RG-59 is usually if not always copper braid in addition to a copper center. The RG-6 is an aluminum foil and braid, only the center is copper. Copper has gone up dramatically. RG-6 has become very common so it is no longer the specialty item it once was.

Thanks for the info.
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One thing to keep in mind is that I've seen a lot of websites saying that the aluminum braid doesn't work well for running composite (yellow RCA) video over -- it's mainly for CATV signals.

We pulled approx. a 150' run of aluminum RG-6 to be used for composite (yellow RCA) video signal and it seems to work just fine. Maybe greater distances don't work well?

A good place to check for bulk cable is www.deepsurplus.com. I've had good luck with them in the past.
 
Yes, I saw that too

Yes, I came across that information too. It didn’t make sense to me so I dug a bit deeper. The outfit I worked for used RG-6 quad shield for interconnects all the time. As long as you don’t bend it a lot it will work fine. They probably shouldn’t have used it for connecting the RGBHV signals on plasmas with movable mounts but oh well. You have to install what they give you to work with.

The Belden cable site is a treasure trove of information. The foil vs. copper braid decision breaks down to what frequencies you are trying to block. If you are concerned with shielding your signal from RFI (Radio Frequency Interference, 50MHz and up) pick the foil shield. If you are concerned with EMI (Electro Magnetic Interference) pick the braid. There is also a spiral braid that is very flexible but it is only recommended for audio work.

So it goes if you're trying to ship high frequencies you need to worry more about RFI. When shipping the lower frequency signals you need worry more about EMI. Still, the braid's protection from EMI is not complete. For the best isolation put the run in EMT (Electro Metalic Tubing) aka conduit or pipe.

Thanks for your info awdj.
 
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