Q&A for How to Splice Coax Cable

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Question

How can I determine if the comcast cables are spliced or connected to my neighbor's homes? My cable reception and internet are continually dropped.

Community Answer

Use an O-scope to send a pulse into the cable and look for spikes and/or discontinuities reflected. There should only be one at the distance the coaxial runs to the drop box cable origin.

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Question

Can I plug a Cat 6 ethernet cable into my neighbor's router?

Community Answer

Assuming that the device you want to connect is within 100 m of the router (accounting for windows, wall, fences, etc.), then you should be able to connect to the router.

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Question

Can I splice two cables together like a regular wire splice? Or can I solder two cables together?

Community Answer

No. There are certain physical effects that come into play at high frequencies which are not significant at low frequencies or DC - to simplify greatly, the space around the cable is itself electronically active, not merely the metal part itself. That's why you need coaxial cable, not just two wires side-by-side like regular mains power cable. This also means that you can't reliably splice coaxial cable without very careful consideration of the joint geometry.

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Do F connectors come in different sizes for different cables (RG6, RG59, etc)?

Community Answer

Yes. You have to match the size and style of the connector to the correct wire. Also, avoid crimp-on fittings. Only use compression fittings.

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