Hello, I am incurring infrequent video loss from my 600tvl that i mounted approx 340ft away from the dvr.  I connected 3 pre-cut cables that are used for indoors, and thought this would work out.  It does but not 100% reliable.  1) so someone told me to buy and use a single run of the heavier RG59.  But i would have to provide power to the cam within 150 of it.  However, this is not possible because there is no power avail where it is located.  2) Then someone else told me to use Ethernet Cabling but has to be pure copper base and not that copper clad aluminum.  Yet, i read here and there that CCA type has been used but i dont hear if it works.  3) Then i found RG59 siamese cabling for cams that is also CCA.  But the initial suggestion i got was that the power would have to be nearer to the cam and not from the dvr.  The RG59 siamese cabling seems to be a contradiction to what was suggested to me, because it has wiring to send power through it from the dvr. 

As you guys can see, i am pretty confused with figuring out how to cost effectively power a little cam approx 350ft from my apartment unit to where my car is parked and vulnerable to vandalism. It works great with a couple of the cables connected together to make like 200ft line.  But with the third line, the cam has vertical wavy lines that run from the left to the right.  And sometimes the pic goes black for several hours.

thanks for any suggestions and or clarifications !! ben