[https://ufile.io/tid1tirs Schematic] for an [[wikt:over-unity|overunity]] simulation of a variation of [https://overunity.com/18631/bidirectional-emf-dc-power-supply/msg573439/#msg573439 Brubaker's Hairpin] which upholds [[w:Foster's reactance theorem|]] in that an over-reactance occurs beyond the conventional limit of 90° displacement from unity power factor. Instead, a displacement of 180° occurs owing to its negative impedance.[[File:Brubaker6h4 output-graphic 1ks+53s.png|thumb|Output of [http://vinyasi.info/mhoslaw/Parametric%20Transformers/2023/Jan/brubaker6h4.zip schematic.]]]