# Oscillators

### Explanation of question 9

To assist in ensuring the good frequency stability of a VFO

1. it should be mounted next to the power amplifier to maintain an even temperature
2. the capacitors should have a large positive temperature coefficient
3. the coil should be wound under tension
4. the coil should be wound on an iron core

The answer is :- 3 The coil, wound under tension, particularly on a grooved former, will assist in providing good stability.

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