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Topic: FM direct conversion radio (Read 659 times) previous topic - next topic

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FM direct conversion radio
Hi everyone! I found on a book and also on the internet this interesting diagram of a FM direct conversion radio.
The problem is that it was designed for the FM OIRT, not CCIR. As a direct conversion the oscillator works at half of the frequency tunned as is described. Will I be able to adjust the circuits to tune into 88-108?
How many turns should have each coils?
Initially it is said: 3+3 for L1 and 20 for L2 (9 turns in the case of using a small ferrite)



Refference: http://zpostbox.ru/fm_receivers_with_pll.html