Thevenin's Equivalent Help!

[circuitnewbie]

Hi guys
Can someone help me with this? I need to know the Thevenin's equivalent circuit of this, that is Vab/Vth, and Rab/Rth.



I'm having a hard time finding the Thevenin's Equivalent when there are dependent sources.
Thanks in advance!!

 

[SeriousTyro]

I haven't done Thevenin in quite a while. As you can see, getting Vth is not a simple matter. What I suggest, though it might be quite tedious, is to label all the important nodes and do KCL on each of those nodes and solve for Va and Vb which will get you your Vth.
Rth should be relatively easy to find as you're going to be shorting the voltage source.

If you need more reference on Thevenin:
Thevenin's Theorem
thats what I just referred to.