A scrapless thermoforming machine includes a plurality of transport trays having frames configured to hold thermoplastic billets and billet clamps. Methods for isolating microorganisms from clinical and environmental specimens are also disclosed. The output buffer includes an inductive voltage divider circuit configured to weaken a loading at the oscillator differential output and it increases the output power. Switching noise within a desired passband can be reduced by switching at a rate that is greater than the desired passband. The feedline is electrically coupled to the patch element to guide an electromagnetic signal to or from the patch element.