Basic arials

[sellers]

Whats the deal with your typical aerial wiring.

Is it as simple as I'm thinking. Aerial with coax connected. To booster, then from booster with coaxes to every point.

or without booster, using a splitter of some sort.

Thanks

 

[Theorysparky]

if you intend to feed one point in the house then there is normally no need for a booster

if you intend to feed multipoints then a booster with splitter is the way to go

you will have problems splitting the signal without a booster ,, the loss with the splitter can be as much as 3.5 db unless you use a 'tap' which is 1.5 db

something like this is used

http://www.screwfix.com/prods/54224/Electrical-Supplies/TV-Range/Amplifiers-Distribution/Labgear-CA141-S-Compact-Aerial-Amplifier-Single-Input-4-Outputs

 

[Lurch]

Whatever you do, under no circumstances ever use that horrific cheap crap brown low loss coax that the wholesalers give out. Use proper CT100, preferable foam spaced.

I always try and use equipment with F connectors rather than Belling Lees as they're also pretty bad. If you're fitting an aerial always try and get it outdoors wherever possible, and if you're replacing one don;t re-use old brackets and masts.

 

[Apache]

If you use a booster make sure you hide it somewhere, such as the loft and be sure you spur off the lighting circuit if at all possible. Better still box it in so it's invisible.

 

[Lurch]

You can spur off whatever you want. I tend to use line driven amps and stick a power supply behind a TV somewhere.

 

[bil]

I believe I

 

[Lurch]

Satellite cable is coax. Satellite and TV aerial cabling is 75ohm.

The difference between satellite cable and normal coax from the wholesalers is the double screening on the satellite cable. The impedance is still the same.

 

[bil]

Cheers Lurch Applaud Smiley, I know about the screening but didn't know they were the same impedance - if I'd done a quick google search before hand I would have found this.

Just need to correct the person that told me now

 

[batty]

Cheers Lurch Applaud Smiley, I know about the screening but didn't know they were the same impedance - if I'd done a quick google search before hand I would have found this.Just need to correct the person that told me now

A little slap helps.

 

[bassman]

50 ohms is for Radio RF as said by lurch 75 is for video, best place for any amplifier is in the loft easy to get cables to and check if it goes faulty.I always wire them via a FCU 3 amp fuse.

Some nice labgear that you can put your sat through and use magic eyes +feed a camera through them so can watch from any room connected to the amp.

Happy viewing

 

[PBC_1966]

50 ohms is for Radio RF as said by lurch 75 is for video

Composite baseband video connections are generally 75 ohms, but when we're talking about an antenna connection or the I.F. from a satellite dish/LNB to receiver, it's still radio frequency - The R.F. just happens to be modulated with video signals (plus accompanying audio).

Both 50- and 75-ohm coaxial feeders are common in R.F. applications: 75 is the norm for domestic TV, satellite, VHF radio etc. while 50 is standard for PMR, CB, and many similar systems.