TV sockets - isolated / non-isolated

[endecotp]

Does anyone know about this? TV aerial sockets are available as "isolated" and "non-isolated". I presume that the isolated ones have a capacitor or inductor - I don't think I've ever seen one of those. What's the rationale behind this? Which should I fit?

Thanks.

 

[pete01]

Didn't know that was a thing....

I'd fit either and if it doesnt work fit the other one

 

[ericmark]

If you have a mast head amplifier, then it needs a DC supply up the coax, so non-isolating is used, but otherwise you can get atmospheric voltages in the aerial which can give one a nasty belt, so isolated used, it will not protect from a lighting strike, but may protect from near misses.

 

[endecotp]

Ah yes, DC for satellite amplifiers etc. We do have an aerial amplifier but it's powered locally.

Thanks.