Extra exam question E6D09
Subelement E6, CIRCUIT COMPONENTS· Group E6D
What devices are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of a transistor HF amplifier?
- A.Electrolytic capacitors
- B.Butterworth filters
- C.Ferrite beads (correct answer)
- D.Steel-core toroids
WhyFerrite beads are commonly used as VHF and UHF parasitic suppressors at the input and output terminals of a transistor HF amplifier. Small ferrite beads slipped over the leads at a transistor HF amplifier's input and output are a common, simple way to suppress unwanted VHF and UHF parasitic oscillations, adding just enough loss at those higher frequencies without disturbing the intended HF operation, answer C. Electrolytic capacitors, Butterworth filters, and steel-core toroids aren't the standard tool used for this specific parasitic-suppression role.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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