However the triode vacuum tube oscillator performed poorly above 300 MHz because of interelectrode capacitance.
2.
Since cathode bias is normally employed at audio or very low radio frequencies, issues such as transit time and interelectrode capacitance may be disregarded and the ideal assumed.
3.
Many types of parasitic oscillation are caused by small interelectrode capacitances ( parasitic capacitance ) or mutual inductance between adjacent wires or electronic components on the circuit board, which create an inadvertent feedback path.
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