thanx thats great advise. regarding wat u said "The resistive load will probably increase your 12 volt output and the differential should be very close to 7 volts." i get that resistive load in the red wire +5v will push the yellow wire +12v up thanx for clarifying, i was wondering, can i push the red cable +5v higher with the resistive load and if yes i'm guessing i put it across red and black same way to push up yellow cable?


about the heli not turning on by using red and yellow and turning on with black and red i dont know either. i measured volts coming out the supply cables and measured across the cable that i attached to the heli and got same reading. the only thing that i did different to the power supply was removed the fan but i have it on all day every day because i'm using it to power up a 12v hub. and i check the temperaure and is not even warm. but i will try with another power supply tomorrow ATX this time.

u gave me a good advise about the cable i'll take ur idea about using only 2 innner cables. luckly i have phone cable that goes in the walls i have about 200 feet and the sheath u can take it off by pulling a small string that runs inside the cable. the gaude is thicker then phone cable thats used to connect to wall rj-11 jack, thanx.