Amateur Extra › E7 Practical Circuits › E7H02
E7H02
What is a microphonic?
Pick an answer to check it.
Answer: C. Changes in oscillator frequency caused by mechanical vibration
A microphonic is a change in oscillator frequency caused by mechanical vibration or shock. Parts that move slightly change capacitance or inductance, shifting the frequency.
Tip: Tap the rig, the frequency wobbles.