Splicing an HD antenna into my Comcast cable coax

[jc480]

I have Comcast basic cable. I'm sick of paying for what I can get free over the air.

I also receive Comcast internet service on my cable.

I wish to replace Comcast with an HD antenna...I have a few questions that I hope some of you can answer

- I have a powered signal booster in my attic where the coax comes into the house...should the signal booster be upstream or downstream from the HD antenna?
- I want to turn off Comcast cable AFTER I splice the antenna into my incoming coax line. What will I see at my television when I have Comcast basic cable and a signal from an HD antenna coming on the same coaxial cable?
- Will there be any issues with an HD antenna signal interfering with my Comcast internet as they will both be using the same coax?

Thank you!

[mtbkr]

for starters, i am a comcast supervisor. if you splice the antenna into the cable it can cause upstream noise to be back fed into the cable and then this noise will be amplified by the booster in your attic. this noise can kill your internet and if the noise is bad enough it can cause a internet and phone outage in your node. second, the tech that hooked up that amp in your attic should have never ran your internet line through it, just the t.v signal. i would recommend that you do not try and run the cable and antenna at the same time. hook up your antenna to make sure it works the way you like. if it does then set up a appointment for a tech to come out and make sure that your internet has its own outlet(bypassing any splitters or the amp), then tel him you no longer want the video service and disconnect it.

[mdabb]

Get an A/B switch from Parts Express. That's What I use to switch back and forth between the cable and antenna feed. Another good thing to do is make sure you are using a proper amp, sometimes it can be too weak or too strong, yes too strong !!!


I use to know of a great "how to" antenna website, let me try to find it again.

[mdabb]

Here you go: http://www.hdtvprimer.com/ISSUES/erecting_antenna.html

Should have all the info anyone could possibly need to answer any questions you might have about the realm of antenna's.

[mtbkr]

if he is getting rid of his cable then no a/b switch is needed. 99% of the house amps i run into are garbage. if he already has the amp that comcast gave him then he will not need to buy a new one.

[mdabb]

Originally Posted by mtbkr

if he is getting rid of his cable then no a/b switch is needed. 99% of the house amps i run into are garbage. if he already has the amp that comcast gave him then he will not need to buy a new one.

Overlooked the "getting rid of Comcast" part, sorry bout that. I don't blame him though !!!

Just depends on the amp that's all. I am not familiar with the Comcast supplied amp so I wouldn't know how well it will work in his situation. I will say not using the proper amp for whatever antenna setup he is going with can have a negative effect on the signal. He didn't specify what antenna he is going with, so no use in guessing.

[mtbkr]

+1...all depends on the antenna quality