Mod-Your-151 How-To Guide

[mobes]

Greetings

After doing some research on this and a couple other sites, I made a few modifications to my Harbor Freight 151 Dual MIG this past couple weeks. The information was all out there, but I didn't feel there was any straightforward how-to guide for the mods - so I decided to document my work and put one together myself. When following this or any how-to, be sure to unplug your welder and keep safety in mind. Double check your own work. I'm not responsible if you or your wife, husband, brother, sister, cat, dog, etc get hurt. Without further adieu...

Here is a diagram of the rear section of the welder in stock form. The rectifier takes in the AC current that is output from the transformer on the terminals marked ~ and outputs DC current on the +/- terminals. A lot of the questions I saw were regarding where to attach the capacitor. It connects to the +/- terminals of the rectifier.