I bought some extension cables to move my tv/sattelite to the other side of...

If the wire was the dish end there would be no voltage on it, if it was from the satellite receiver end there would be an 18V DC maximum voltage on the cable. Not really enough for a shock. More likely you may have a tiny splinter of wire in your finger that needs removed. Have a look at it under a magnifying glass and a bright light.

Satellite receivers sometimes provide a reverse power source to power the LNB (amp on the satellite dish), it is low voltage and on the cable line coming to/from the satellite dish. I suspect that that is what you feel. It is NORMAL when you touch the exposed wire center conductor wire.

If you have it hooked back up and feel tingling through the wire you have something shorted from the ground (braid) wire to the center conductor wire. Probably a bad F81 connector. That need to be checked, as that is NOT normal.