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Re: Insufficient cable TV wiring bandwith..

Our home was wired for cable TV when we built it18 years ago using RG59

>cable installed before the sheetrock went up. I installed a current >state of the art cable TV distributution amplifier to make sure we had >sufficient signal to drive the 6 cable outlets, and it worked fine. > >When we upgraded to digital TV this year, I had to buy a new 900 Mhz >distribution amplifier, but now the higher numbered channels are >noticably snowy on the two longest cable runs, when viewed on "cable >ready" sets without a digital set top box. > >I could replace those runs with wider bandwith cables, but the only >reasonable way to do that will be to punch through to the outside of our >home's walls and run the cables around that way, dammit. > >Are there reasonably priced cable TV booster amplifiers with adjustable >bandwith slopes on the market? I think that could provide a way to live >with the existing RG59 for a while longer, without overloading the lower >channels. I don't have access to an RF lab anymore, so I can't easily >DIY this project. > >Thanks guys, > >Jeff

Try ChannelPlus. I seem to vaguely remember mention of "tilt" in their literature.

Is your existing cable routed through an attic? If so use the existing RG59 to "pull" good dual(or quad)-braid RG6. The loss difference is substantial.

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  Jim-T@analog_innovations.com  Fax:(480)460-2142  |  Brass Rat  |
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Reply to
Jim Thompson
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In article , Jim- T@analog_innovations.com mentioned...

I'm not sure if you mean replace the whole cable or just the accessible part. Replacing the part that is accessible would help, even tho it's only a fraction of the total run. Or else a 6dB per octave high pass filter that cuts down the level of the lower channels.

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Reply to
Watson A.Name - 'Watt Sun'

If you can, crank up the gain on the 900Mhz head amp, then fit attenuators on the wall plates of the short runs to compensate for overloading (or even at the head amp end) - these attenuators are only a buck or two so this inelegant solution might work.... Andrew Vk3BFA

Reply to
Andrew VK3BFA

Jeff, I had the same problem about a year back, and none of the suggested solution worked for me. Long run of the old RG59 are simply too lossy at high frequencies to be readily compensated.

My eventual solution was to run the new cable by whatever means was available. Fortunately my home has air conditioning ductwork, so most of the cable ended up running though the A/C ducts to the attic, then were fished down the walls. Sometimes I did have to cut though the sheetrock, but with a little effort sheetrock is trivially easy to repair, spackle, and paint. Wall-paper is equally easy to deal with.

Harry C.

Reply to
Harry Conover

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