Hi, I have trouble finding the equivalent Thevenin resistance for this network: I managed to do most of the other exercises and looked on the internet for quiet a while, but really can't find it. I've found E(th) though. I redrew the circuit with the 300 ohm resistance in series with a parallel combination of 400 ohm and 2k on the one side and 1k on the other side. R(tot) then is 1005,8 ohm, I(tot) = 14,9 mA. Voltage over the 300 ohm resistor is 4,47V, over the 400 ohm resistor 1,755V, substracted from the 15V voltage source gives 8,775V for E(th). But I just can't find the equivalent Thevenin resistance. I redrew it but don't know if it's correct... I thought, looking "in" to the circuit, the first thing you the load "sees" is a parallel combination of the 400 and 2k resistances, solve for them, put them in parallel with 1k and the whole in series with 300 gives R(th), but that's incorrect. Any clues? Thanks!