[mythtv-users] OTA interference with cable causing ghosting

Allen Edwards allen.edwards at oldpaloalto.com
Thu Jul 31 05:32:51 UTC 2008


Brian Wood wrote:
> On Wednesday 30 July 2008 20:39:08 Allen Edwards wrote:
>> Use RG-6Q cable and professional connectors attached with a high
>> quality crimp tool.
>>
>> Connectors: https://www.tselectronic.com/thomandbetts/sns.html
>> crimp tool like this:
>> https://www.tselectronic.com/paladin/901024.html
>> Cable like this:
>> https://www.tselectronic.com/belden/1189.html
>>
>> And, if you get this stuff, you can use these cables for your audio
>> and video interconnects with this:
>> https://www.tselectronic.com/gc/video/video_adaptor.html
>>
>> Some people prefer this wire:
>> https://www.tselectronic.com/belden/7916a.html
>> or similar with solid coper center conductor but I have used the coper
>> coasted steel stuff without issue.
>>
>> I had the same issue with off the air interfering with cable until I
>> got this kind of cable.
> 
> Reasonable advice.
> 
> Make sure things are well grounded as well, a lot of cable installers give 
> short shrift to this. If you are really close to the transmitters you may 
> have to ground at multiple points.
> 
> But if the feed to the capture card is the only one that's bad, and the others 
> are OK, then you probably have a single cable or connector problem.
> 
> If you are actually in the Near Field of the transmitting antennas I'd 
> consider moving :-)
> 
> beww
> 
> 
> beww
> 
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> 
Good point.  Grounds are a huge issue.  I run a ground wire specifically 
up to the antenna pole from the breaker box that supplies the circuit 
for all the hi-fi/ tv/ projector gear.  The antenna lead goes through a 
ground block bolted to that same pole.  If you use different grounds, 
you can get hum in the audio or in the picture.  For cable, same thing, 
you want a grounding block where the cable comes into your house and 
grounded to the same ground reverence as the rest of the entertainment 
gear.  You may want this same ground reference connected to your Myth PC 
case.

Allen



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