Line Voltage Inducer

[TheTinWhisker]

Hey everyone, got a question.

I finally got a Raspberry Pi 3 and the 56K USB modem on the way. I have all the parts to build the line voltage inducer and was about to begin when I noticed that every phone line I have only contains two wires.
In all the schematics i could find online for the inducer, they show four wires with splicing the red wire. So my question is, can I use the 2 wire phone cable?
Also, does the polarity of the capacitor and resistor matter? Every schematic ive seen looks like it was drawn by a second grader.

[megavolt85]

can I use the 2 wire phone cable?

yep

Also, does the polarity of the capacitor and resistor matter?

observe the polarity when connecting power to the capacitor

[TheTinWhisker]

I have seen the polarity in different positions depending on the picture I find on the internet. Also, those pictures dont show which side connects to the Dreamcast. Does anyone have a good schematic?

[megavolt85]

I have seen the polarity in different positions depending on the picture I find on the internet.

solder the plus of the power source to the plus of the capacitor, and the minus of the power source through a resistor to the minus of the capacitor.
cut one of the two wires of the telephone cable (any one of your choice) and solder one end to the positive of the capacitor and the other to the negative.

Also, those pictures dont show which side connects to the Dreamcast.

it does not matter