new coax cable?.

butchyboy

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hi guys i really need to change my coax cable on my motorised mabo 1.85m dish and i think its just normal 75ohm cable thats on it and nothing special.


what do you think of the above cable webro wf125 ?.it is exspensive stuff but i have a friend going halves in it with me so works out cheaper that way and 50m for him and me.will not be using the whole 50m for my dish probaly 25m-30m.
 

moonbase

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@butchyboy

Webro WF125 is very good cable but a bit stiff.
From personal experience I have sometimes had to file the inner copper core to a small taper to get it to fit into the satellite receiver LNB input.

I am not sure if you will get the benefit of WF125 for a 25m to 30m cable run and if there will be a really noticable difference compared to WF100.
The gain might be fractions of a dB on that length of cable run. However, if you are right on the threshold of a lock for a frequency, the WF125 might get you over the line?

Having said that, if you are getting the WF125 at a good price then go for it, you got nowt to lose, not even 0.1dB.
 
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Manikm909

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i recently got 100m Webro Black WF100 for £50....famous auction site.
 

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@butchyboy

Webro WF125 is very good cable but a bit stiff.
From personal experience I have sometimes had to file the inner copper core to a small taper to get it to fit into the satellite receiver LNB input.

I am not sure if you will get the benefit of WF125 for a 25m to 30m cable run and if there will be a really noticable difference compared to WF100.
The gain might be fractions of a dB on that length of cable run. However, if you are right on the threshold of a lock for a frequency, the WF125 might get you over the line?

Having said that, if you are getting the WF125 at a good price then go for it, you got nowt to lose, not even 0.1dB.
Got to be better than what you have.

Slope equalising on a run beyond 20m is as important as the overall attenuation.

There are plenty of pretenders out there so make sure it is genuine stuff, and ask the seller for their experience on the right connectors as you may find they are clueless.
 

butchyboy

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Got to be better than what you have.

Slope equalising on a run beyond 20m is as important as the overall attenuation.

There are plenty of pretenders out there so make sure it is genuine stuff, and ask the seller for their experience on the right connectors as you may find they are clueless.
hi hopper can you enlighten me some more on slope equalising as im a bit lost.
 

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A slope equaliser is an in-line amplifier that gives a higher output gain at the higher frequency IF end (say 2000MHz) compared to the lower frequency IF end (say 1000MHz), hence a "slope" in the gain of the amplifier across its frequency range.

As for the seller, I've bought a few things from freetv.ie over the years (the most expensive being a 1.2 metre dish) and everything's been fine coming from them in my experience. I've no experience in handling WF125 myself but I would say that make sure you get WF125 compatible F-connectors as the "normal" F-connectors for WF100 or RG6 type cable likely won't fit on to the thicker WF125 coax - I've also read that it might be better to use a small WF100 or RG6 "pigtail" between the receiver socket and the WF125 coax cable, due to the heavier weight of WF125 coax cable placing more strain on the receiver socket.
 

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@butchyboy

A couple of weeks back I compared a 25m run of WF125 with a 25m run of WF100 from the same dish and same LNB using the same satellite receiver on several different satellites.
The result was that there was possibly a 0.1db to 0.2db higher signal level achieved with the WF125. The test was carried out using the same output port from the LNB.

The purpose of the test was to see if it was worth replacing some WF100 cable runs with WF125 for locking some extreme fringe UK signals such as those from 25.5 East in Ku-Band
I had previously achieved some transient locks on a couple of frquencies from this satellite and was hoping that there might be just enough increase from WF125 cable to keep stable locks

Signal levels generally fluctuate by around 0.1dB to 0.2dB as viewed in the signal level readout from the receiver.
However, by measuring a number of different frequencies from the same satellite and averaging the signal level per cable type I concluded that the WF125 had the marginal edge but it was close to the expected fluctuational level.

As for the outcome of the test, it helped to keep the transient locks from 25.5 East for a slightly longer period.
At my location in the UK, the signal levels of Ku-Band frequencies from 25.5 East are time dependent, they follow a pattern over the course of a day and have a time when they are at their maximum.
The WF125 cable very slightly extended this time window but was not sufficient to justify replacing the existing cable runs of WF100.
 

butchyboy

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thanks moonbase and fisty mcB for your input and help.

just one thing,what length of coax should i go with,like i was saying 25m - 30m run but would i be better off with a longer run?? or would it still be the same out come as the 25m-30m run?.
 

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the shorter the better (as long as it reaches)
 

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Whilst it shouldn't make a difference in reception, the first link suggests the connectors are 50Ohm standard.
 

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Best of luck with those compression connectors - I tried many ways (at some cost!) & failed to get them to work successfully & relliably:eek:
 

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The trick is to make sure the connector is pushed right onto the cable before you compress, this can be quiet hard to do, i use a piece of rubber to grip the cable (i bought a rubber disc designed to do this).
 

butchyboy

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Crimp on might be handier
 

butchyboy

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guys this is the old coax cable i was using on my system,i have never heard of it before any of you guys come across it?????

 
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