i have changed the Co-axial Cable for my sky digital to extend it but now get ghost and shadows on t


Kid Friday , Wednesday, 11th of August 2010 07:29:14 AM

Hi all. can anyone help me with this please, l brought 10 metres of 
Kid Friday
Co-axial Cable. as l moved my tv to otherside of room, l tried at first 
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with using an extension conector and cable that l got from argos but the 
Joined: Monday, 10th of May 2010, 12:13:48
picture was full of shadows and ghost on tv. so l thought l would buy 
Posts: 969
whole new Co-axial Cable at 10 metres l then followed the instructions on 
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this website
http://satcure.co.uk/tech/fconn.htm
i made sure 
that l followed it correctly,but did not apply the silicone paste in the 
last step l just put on some black Tape recommended to me by the shop on 
the satelite connection side of the cable. this was the only site l could 
find to help me. but after doin all this my picture on tv still has 
shadows and ghost of other programes goin across the screen. any ideas on 
how l can fix this or am l following the wrong instructions on this 
website, the sky box im using is thompson and have tried changing scart 
lead and connected the sky scart lead straight to tv but still no joy/>thanks ahead for and help
thanks for that info wx_rider, yeh l 
checked the inner core cable and its just over 3 mm l would say bout 5. 
when l took off the orginal conectors the core was roughly about the same 
size sticking out. should l try make this bit longer, im using the same 
connectors as when sky installed it. if not ill try the ideas u mentioned 
like getting new crimp connectors. im not sure of the specs of the cable 
ive got alll can say is its back with no writing on it, and the dish is 
properly mounted to my wall outside. thanks for your help much 
appricated
thankx tracy, yeh was suprised myself when couldnt see no 
writing on it. ill check the satellite dish end see if can see anything 
written that side. if not ill try another shop and ask forthat cable and 
for them to crimp it, does the crimping thing mean they put the 
connections on for you because l have to put the cable thru a hole in 
window frame. oh yeh one more thing, the picture on tv was perfect before 
l changed the cable, so dont think its the corrosion must be wrong type of 
cable as u have both said
thanks for all your help
 
 
 
 
 

Sugar Daddy , Thursday, 12th of August 2010 12:29:27 AM

First you need to verify the cable. It has to be 75 ohm cable.  
Sugar Daddy
50 ohm cable looks almost exactly the same, but it will not do. I don't  
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remember seeing co-ax cable with no writing on it. You need RG-59 cable.  
Joined: Monday, 7th of June 2010, 09:33:45
 
Posts: 199
If the TV shop crimps the connector on the cable it will probably not fit  
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through the hole anymore, but a good crimp connection with new connectors  
is important, maybe you could drill the hole bigger & put some caulking in  
it when you are done. Or if ur TV shop is the friendly kind, maybe they  
would loan or rent the crimp tool to you & sell you new connectors.  
 
 
 
 
 

Mickey , Friday, 13th of August 2010 04:11:30 PM

I would suspect the problem to be with ur connections. Often  
Mickey
people make the inner conductor of the F connector too short & it doesn't  
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fit fully into the mating connector when plugging in. Take the connectors  
Joined: Saturday, 1st of May 2010, 20:51:58
off & see if the wire protrudes beyond the end of the screw threads by at  
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least 3mm. Sometimes if it is too short you can still get a signal,  
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although it is very weak.  
 
I am also not a big fan of those ''twist on'' connectors they talk about  
in that article; they are notorious for providing a poor connection &  
invite several common problems to occur such as weak shield connections &  
even shorts. You may need to pull off the whole cable & test it with a  
multimeter to ensure you don't have either problem. I would recommend  
ALWAYS using crimp connections (especially compression type) for  
digital/microwave/satellite use.  
 
If that isn't the problem than you may need to make sure you have the  
right kind of cable; it should be rated for digital/microwave/satellite  
use & have an impedance of 75ohm. Sometimes people find cable intended for  
other purposes & get poor performance out of it.  
 
Failing that.. check to see something else hasn't happened by  
co-incidence.. such as an antenna getting knocked out of alignment (it is  
happened..)  
 
Good luck!  
 
 
 
 
 



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