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Topic: Simplest AM radio receiver (Read 8 times) previous topic - next topic

Grumpy_Mike

Yes that is all you need.
If you wind the coil on a ferrite rod, you can tune the radio by sliding the rod in and out of the coil.

adilmalik

Okay, so how can i calculate the number of turns i need to wind round the core?

adilmalik

so in the lc circuit i can either keep a variable cap or a variable inductor?

Grumpy_Mike

One over two Pi root LC gives you the resonant frequency. (sing it)

The number of turns depends on a lot of things like the diameter.
If you just want to try for medium wave wind 40 turns.
Make the C about 200pF.

adilmalik

can i used a fixed 200uh inductor and just vary the cap? of does it have to be the inductor.

Thanks again

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