# Operating procedures and practices

### Explanation of question 13

Repeaters for use by mobile operators are used on amateur bands at

1. VHF. and UHF.
2. HF and VHF.
3. HF
4. all amateur bands

The answer is :- 1 Repeaters are used at v.h.f. and u.h.f. The h.f. bands are for comparatively long-distance communication and therefore do not require the use of repeaters.

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