Defrosting apparatus with repositionable electrode

A system, comprising:

• a containment structure forming a cavity;
• a first electrode disposed in the cavity;
• a plurality of support structures disposed in the cavity at multiple heights;
• and
• a second electrode disposed in the cavity, the second electrode being removable and being configured to divide the cavity into first and second volumes when supported by a first support structure of the plurality of support structures, and being configured to divide the cavity into third and fourth volumes when supported by a second support structure of the plurality of support structures;
• and
• a radio frequency signal source that supplies radio frequency energy to either or both the first electrode or the second electrode.

A thermal increase system comprising:

• a containment structure that forms a cavity;
• an electrode disposed at an upper interior surface of the containment structure;
• a repositionable electrode disposed across the cavity so as to divide the cavity into first and second volumes;
• a first support structure disposed at a first sidewall of the containment structure;
• a second support structure disposed at a second sidewall of the containment structure that opposes the first sidewall, the repositionable electrode being removably engaged with the first and second support structures;
• and
• a radio frequency signal source electrically connected to either or both of the electrode, or the repositionable electrode, the radio frequency signal source being configured to provide radio frequency energy to either or both the electrode or the repositionable electrode.