
- I don’t have too much on these, but they appear in many forms. Claimed are:
- Low voltages at extremely high currents
- High frequency oscillations
- Excitation with magnetic fields, small voltages, or heat.
- I briefly looked into this sometime ago with the current-to-voltage Op-amp circuit:

- With heat added to junction, circuit became strong detector of local FM station, but died off with cooling.
- With small positive voltage added in series with constantan lead at X, circuit became detector again, but poorer.