17 replies to this topic

[piplan1966]

My dish antenna is 80 feet away from my room.
The length of the cable from the receiver to the LNB is 85 feet.
Does this length make a difference to the signal or not?

[Trial]

Hi,

only if you have pro equipment for measurement. If you have cable with good shield a lot mor is possible.A good cable has a high dB value in the specs.

 

Ralf

Edited by Trial, 29 September 2022 - 07:35.

[WanWizard]

Indeed, it depends on the quality of the cable, the connectors, the wall plate and whether or not you have couplers in the cable.

 

About 10 year ago I had almost 50 meter end-to-end, with one coupler at about 15 meter from the receiver. Wasn't a big problem. If I remember correctly it was Hirshmann Koka 9 cable.

[piplan1966]

Hi
Please name a good quality cable,
which every shopkeeper has,

[WanWizard]

There is not a single product in the world that "every shopkeeper has".

[piplan1966]

There is not a single product in the world that "every shopkeeper has".

You are absolutely right

[WanWizard]

Hirschmann KOKA 9 TS (for inside) and KOKA 799 (for inside/outside) is pretty widely available.

 

If you can't get hold of it, contact a reputable satellite shop and ask for advice for your specific situation?

[el bandido]

A good quality cable for satellite will be swept tested to 3 GHz and have a solid copper core or solid copper center

A Poor Quality cable will have copper coated steel core or copper coated steel center.

[piplan1966]

A good quality cable for satellite will be swept tested to 3 GHz and have a solid copper core or solid copper center

A Poor Quality cable will have copper coated steel core or copper coated steel center.

I think what you said is correct

[zeros]

Good cable is AL113 PE/A/100m/HQ113 1,13Cu, ÖREN 17dB/100m

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[piplan1966]

Good cable is AL113 PE/A/100m/HQ113 1,13Cu, ÖREN 17dB/100m

thanks

[zeros]

BTW, a suitable F-connector for this cable is F-connector 7.0mm/4,5/20mm (AL 113, AL 112, with two inner threads).

You probably are not happy if you don't have the right connector, I can put a photo, but it looks like the F connector still. The dimensions are important.

Edited by zeros, 2 October 2022 - 18:44.

[MiLo]

My dish antenna is 80 feet away from my room.
The length of the cable from the receiver to the LNB is 85 feet.
Does this length make a difference to the signal or not?

Bit old, but still, I'd want to respond...

 

80 feet is about 25 metres. Which is basically "peanuts". At distances like that, the cable doesn't matter much. Good quality cable then means that it won't become brittle when exposed to sunlight, that water doesn't creep into it and that it's thick. Below say 100 meters it won't really matter whether the cpre is steel or copper (just ask google for the difference in resistance).

 

Several years ago someone, in response to a similar mail from me, even tried using about 20 metres of telephone wire, and that didn't only just work, the sigal was about the same as from a "quality brand" coax.

 

Connectors usually have more effect, as they cause damping and reflections. Try to limit the number of F-connectors.

 

Keep in mind that the signal has already travelled over 70000 kilometers through the air (and vacuum, mostly) when it arrives at your dish

[el bandido]

Copper coated steel coax is usually made using cheap or inferior materials. The outer jacket of steel cored coax may crack or allow water to be absorbed quicker than coax with a solid copper core. Any coax used for satellite tv should have an outdoor or direct burial rating.
 

Copper coated steel will also corrode and rust in the presence of any moisture. The corrosion or rust  may run down the coax a few millimeters or more. Shown below is an example of a corroded and rusted copper coated steel coax.
 

 IMG_20221016_110746.jpg   50.28KB   3 downloads

[piplan1966]

 

My dish antenna is 80 feet away from my room.
The length of the cable from the receiver to the LNB is 85 feet.
Does this length make a difference to the signal or not?

Bit old, but still, I'd want to respond...

 

80 feet is about 25 metres. Which is basically "peanuts". At distances like that, the cable doesn't matter much. Good quality cable then means that it won't become brittle when exposed to sunlight, that water doesn't creep into it and that it's thick. Below say 100 meters it won't really matter whether the cpre is steel or copper (just ask google for the difference in resistance).

 

Several years ago someone, in response to a similar mail from me, even tried using about 20 metres of telephone wire, and that didn't only just work, the sigal was about the same as from a "quality brand" coax.

 

Connectors usually have more effect, as they cause damping and reflections. Try to limit the number of F-connectors.

 

Keep in mind that the signal has already travelled over 70000 kilometers through the air (and vacuum, mostly) when it arrives at your dish

 

thanks

[piplan1966]

Copper coated steel coax is usually made using cheap or inferior materials. The outer jacket of steel cored coax may crack or allow water to be absorbed quicker than coax with a solid copper core. Any coax used for satellite tv should have an outdoor or direct burial rating.
 

Copper coated steel will also corrode and rust in the presence of any moisture. The corrosion or rust  may run down the coax a few millimeters or more. Shown below is an example of a corroded and rusted copper coated steel coax.
 

IMG_20221016_110746.jpg

thanks

[MiLo]

Yep, cable "quality" is typically about insulation (water and sunlight resistance) and strength, seldom about the conductive properties.

 

I wouldn't have expected them to use steel. Aluminum would be a far better choice, since it's a better conductor, only oxidizes at the outer layers and is probably cheaper than steel too. You wouldn't even need to coat it with copper.

[piplan1966]

Yep, cable "quality" is typically about insulation (water and sunlight resistance) and strength, seldom about the conductive properties.

 

I wouldn't have expected them to use steel. Aluminum would be a far better choice, since it's a better conductor, only oxidizes at the outer layers and is probably cheaper than steel too. You wouldn't even need to coat it with copper.

thanks