Adjective
The state of not having been tuned.
Of or relating to a musical instrument that does not produce specific pitches, e.g. many drums and cymbals.
Source: en.wiktionary.orgLike untuned golden strings all women are, Which long time lie untouch'd, will harshly jar. Vessels of brass, oft handled, brightly shine. Christopher Marlowe
The input signal is used to switch the active device causing pulses of current to flow through a tuned circuit forming part of the load. citation The class-C amplifier has two modes of operation: tuned and untuned. Source: Internet
These performances drew large audiences. citation Reinhardt was reportedly given an untuned guitar to play, which took him five minutes to tune. Source: Internet
In the case of untuned SQUID detection of prepolarized spins, however, the NMR signal strength is independent of precession field, allowing MRI signal detection in extremely weak fields, of order the Earth's field. Source: Internet
This is called untuned operation, and the analysis of the waveforms shows the massive distortion that appears in the signal. Source: Internet