I already wrote about official trials of an SVT rifle modified for fully automatic fire. However, it turns out that the same thing was already tried in the field at least several months beforehand. A simple Red Armyman devised a method of turning his SVT into an automatic rifle.
The conversion is very simple. All you have to do is wrap 0.6 mm diameter wire around a protrusion in the trigger mechanism rod. Unfortunately, the effectiveness of this weapon is not specified. However, given the results of the official trials, it could not have been very useful.