Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-001
How is the positive feedback coupled to the input in a Hartley oscillator?
- AThrough a neutralizing capacitor
- BThrough a tapped coil
- CThrough a capacitive divider
- DThrough link coupling
Correct answer: B — Through a tapped coil. From the official ISED question bank, verified word for word.
Why
A Hartley oscillator creates the necessary positive feedback by using a single coil with a connection point in the middle, known as a tapped coil. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account