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Rick
 
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Default extending coax cable to cable-modem

Hello,
I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.
Regards
Rick

  #3   Report Post  
burbeck
 
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Default

On 22 Feb 2005 06:52:37 -0800, "Rick" wrote:

Hello,
I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.
Regards
Rick



hi rick,
maplin do FT100 and FT125 type cable suitable for your use also the f
connector, get the non crimp types they do various sizes to fit
different cables.
regards
bob
  #4   Report Post  
John Rumm
 
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Default

Rick wrote:

I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.


If you look at the existing co-ax there is a fair chance it is marked in
some way. There is a good chance that an extension made from 75ohm CT100
will be fine.

Use a couple of "twist on" F plug connectors for the extension, and join
it to the old one with a F barrel connector (i.e. two F sockets back to
back)


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/
  #6   Report Post  
Andy Wade
 
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Default

The Natural Philosopher wrote:

I THINK - but am not sure, that 'cable' cable is 50 ohm.


No, CATV uses 75 ohm coax right across the world.

--
Andy
  #7   Report Post  
Andrew Chesters
 
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Default

Rick wrote:
Hello,
I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.
Regards
Rick


I've used CT100 (wot I had under the bench) No problems at all... And
yes, F types. The core of the cable forms the pin of the connector, and
as they screw onto the outer, they must be the right size (give or take).
  #8   Report Post  
Lee
 
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Default

Rick wrote:
Hello,
I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.
Regards


I was told that both NTL and TW use RG6 internally, although the stuff
NTL used here looks more like CT125.
The suggestion to leave the CM where it is and run a long Ethernet
lead instead is definitely the better idea though.

Lee
--
Email address is valid, but is unlikely to be read.
  #9   Report Post  
tony sayer
 
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Default

In article , Lee
writes
Rick wrote:
Hello,
I would like to extend the coax cable to my cable-modem as I want to
move the latter from the front of the house to the back. I'd like to
avoid going wireless if possible for the moment. I've been looking
around but I don't know what kind of coax I should get (I've seen
maplin do RG58, RG59, CT100 and CT125). Which one should I use? I'm
with Telewest, if it helps. Also, some cable are 75 ohms but others are
50 ohms, which one should I use. Finally, are the connectors that go
onto the coax and screw at the back of the cable-modem F-type
connectors? Many thanks for your help.
Regards


I was told that both NTL and TW use RG6 internally, although the stuff
NTL used here looks more like CT125.
The suggestion to leave the CM where it is and run a long Ethernet
lead instead is definitely the better idea though.

Lee

Use some CT100 with the proper F type connectors and it'll be fine...
--
Tony Sayer

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The Natural Philosopher
 
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Default

Andy Wade wrote:

The Natural Philosopher wrote:

I THINK - but am not sure, that 'cable' cable is 50 ohm.



No, CATV uses 75 ohm coax right across the world.

Ta m8. Another factoid to stash away...


  #11   Report Post  
Rick
 
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Default


Rob Morley wrote:
In article .com,
"Rick"

snip
Why not leave the modem where it is and fit a long ethernet cable
instead?

Hi,
That crossed my mind but firstly, I don't want to have the cable modem
under my bed and secondly as the cable will be run outside for some
part, I'm not too sure whether Cat5e is meant for outside use. On the
other hand I do do agree that a long ethernet cable sounds to be less
hassle. On the plus side if things change I still have a usable
ethernet cable whereas for the long coax, I'm not sure what else to do
with it. Does anyone know if ethernet cables can be run outside?
Thanks.
Regards
Rick

  #12   Report Post  
John Rumm
 
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Default

Rick wrote:

with it. Does anyone know if ethernet cables can be run outside?


It will last a few years... won't be much cop for anything else after
mind you. It will last longer if you paint it.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/
  #13   Report Post  
Frank Erskine
 
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On Tue, 22 Feb 2005 23:14:08 +0000, John Rumm
wrote:

Rick wrote:

with it. Does anyone know if ethernet cables can be run outside?


It will last a few years... won't be much cop for anything else after
mind you. It will last longer if you paint it.


Yeah. Remember that PVC absorbs moisture, unlike, for example
polyethylene.or rubber. For electrical work you may not notice it
until the insulation falls below say 1Mohm, but that could have quite
a significant effect for telecomms...

--
Frank Erskine
  #14   Report Post  
The Natural Philosopher
 
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Default

Rick wrote:

Rob Morley wrote:

In article .com,
"Rick"


snip

Why not leave the modem where it is and fit a long ethernet cable
instead?


Hi,
That crossed my mind but firstly, I don't want to have the cable modem
under my bed and secondly as the cable will be run outside for some
part, I'm not too sure whether Cat5e is meant for outside use. On the
other hand I do do agree that a long ethernet cable sounds to be less
hassle. On the plus side if things change I still have a usable
ethernet cable whereas for the long coax, I'm not sure what else to do
with it. Does anyone know if ethernet cables can be run outside?


Sure. The PVC covering degrades in tome, but they should do 5-10 years,
or put em in trunking.

Thanks.
Regards
Rick

  #15   Report Post  
Rick
 
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Default

Hello,
thanks for all the replies. I was looking through my screwfix
catalogue and found that they also do coax cables which are a lot
cheaper than the maplin's ft100 and ft125. Unfortunately, there's
little information and the codes screwfix uses are different. The items
I'm looking at are :
73005: Coaxial CCTV Cable RG59U (High tensile screened Coaxial Cable
for long runs. RG59 75ohm 6mm O/D for broadcast, CCTV, security and
telecoms.)
11466: Coaxial Cable Brown 100M(Low loss, air spaced 75ohm Single
Copper Conductor.)
10633: Satellite Cable PH100(SKY endorsed analogue and digital. BS EN
50117-1 CAI approved.)
13956: Satellite Cable White 100M(Copper Braid and Aluminium Foil
Shielded, air spaced, single copper conductor. 75ohm.)
Does anyone have any experience of these cables and can suggest which
one is appropriate for my situation? Thanks.
Regards
Rick



  #16   Report Post  
tony sayer
 
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Default

In article .com, Rick
writes
Hello,
thanks for all the replies. I was looking through my screwfix
catalogue and found that they also do coax cables which are a lot
cheaper than the maplin's ft100 and ft125. Unfortunately, there's
little information and the codes screwfix uses are different. The items
I'm looking at are :
73005: Coaxial CCTV Cable RG59U (High tensile screened Coaxial Cable
for long runs. RG59 75ohm 6mm O/D for broadcast, CCTV, security and
telecoms.)
11466: Coaxial Cable Brown 100M(Low loss, air spaced 75ohm Single
Copper Conductor.)
10633: Satellite Cable PH100(SKY endorsed analogue and digital. BS EN
50117-1 CAI approved.)
13956: Satellite Cable White 100M(Copper Braid and Aluminium Foil
Shielded, air spaced, single copper conductor. 75ohm.)
Does anyone have any experience of these cables and can suggest which
one is appropriate for my situation? Thanks.
Regards
Rick


Either of the last Two, depending on your choice of colour....
--
Tony Sayer

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