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alkizmo

join:2007-06-25
Pierrefonds, QC
kudos:1
reply to leibold

Re: Hopeless or possible? HDTV OTA

said by leibold:

That would not be an issue. The pre-amp is powered through the coax cable with a power injector inside the house.

Ah.
But what is best? preamp near the antenna or near the TV/Splitter?
edit - Not thinking of putting it in the tree, but I gotta know for when I do setup my ... setup.


leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:10
Reviews:
·SONIC.NET
said by alkizmo:

But what is best? preamp near the antenna or near the TV/Splitter?

Pre-amp inside the antenna (some antennas are designed for that) is best, followed by pre-amp near the antenna. You want to boost the received signal before subjecting it to the losses in the wiring.

I'm lucky enough to get a 73 mile distant station without the need for a pre-amp (LOS, directional antenna).
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alkizmo

join:2007-06-25
Pierrefonds, QC
kudos:1
said by leibold:

Pre-amp inside the antenna (some antennas are designed for that) is best, followed by pre-amp near the antenna. You want to boost the received signal before subjecting it to the losses in the wiring.

A preamp in the antenna and a preamp near the antenna seems like a bit much.

Im thinking of getting the CM7778 (or 7777). If i place it within 10-20 feet of the antenna, then run 40 feet to my splitter, would that be okay?

Bob4
Account deleted

join:2012-07-22
New Jersey

1 recommendation

No, he's saying first choice is an amp in the antenna. Second choice is an amp near the antenna. You wouldn't do both.


Jack_in_VA
Premium
join:2007-11-26
North, VA
kudos:1
Reviews:
·Millenicom
reply to alkizmo
said by alkizmo:

said by leibold:

Pre-amp inside the antenna (some antennas are designed for that) is best, followed by pre-amp near the antenna. You want to boost the received signal before subjecting it to the losses in the wiring.

A preamp in the antenna and a preamp near the antenna seems like a bit much.

Im thinking of getting the CM7778 (or 7777). If i place it within 10-20 feet of the antenna, then run 40 feet to my splitter, would that be okay?

If you use a CM-7777 the preamp goes right at the antnenna and the power supply in the house. You need to put your splitter after the power supply as the coax is the circuit to power the preamp. I have a 7777 and it works great.


leibold
Premium,MVM
join:2002-07-09
Sunnyvale, CA
kudos:10
Reviews:
·SONIC.NET
said by Jack_in_VA:

If you use a CM-7777 the preamp goes right at the antnenna and the power supply in the house. You need to put your splitter after the power supply as the coax is the circuit to power the preamp.

You could use a splitter with "DC pass through" if you have to split the cable prior to the power injector but then you have to pay attention how you connect it (the DC pass through is only one of the splitter outputs).

It is best to do it like Jack_in_VA See Profile said but sometimes there is no power near the first split in the antenna cables. That is especially likely if you are using a splitter/combiner on the roof to combine the signal from the two antennas (to bring only one coax into the house).
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alkizmo

join:2007-06-25
Pierrefonds, QC
kudos:1
said by leibold:

It is best to do it like Jack_in_VA See Profile said but sometimes there is no power near the first split in the antenna cables. That is especially likely if you are using a splitter/combiner on the roof to combine the signal from the two antennas (to bring only one coax into the house).

Well, the cable would go from the antenna to a space under my basement stairs where my network cables and coax cables meet. So the split would be there, and I can put the power injector JUST before the splitter. (well, between the antenna and the splitter, whichever means before or after).

The second antenna would also go directly to that location, as both antennas would be a good 40 feet away from each others and that space under the stairs is between them.