# F.M., A.M. and S.S.B. transmitters

### Explanation of question 22

The output from the filter of a sideband generator is at 9MHz. It is mixed with that of a VFO covering 5- 5.5MHz. Two amateur bands that can be covered are

1. 20m and 80m
2. 20m and 15m
3. 15m and 80m
4. 10m and 20m

The answer is :- 1 The two frequency ranges from the mixer will be (9 + 5) MHz to (9 + 5.5) MHz and (9 - 5.5) MHz to (9 - 5) MHz, i.e. 14—14.5 MHz and 3.5—4 MHz, which will adequately cover the 20 m and 80 m bands.

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