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Simple FM transmitter

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audioguru

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#61
R1 should be 10k.
The other resistors determine the biasing of the audio preamp transistor that is taught in high school.
Sorry, I am not a teacher for basic electronics.
 

HiTech

Well-Known Member
#62
i want to a design of Simple FM transmitter(by electroMaster). I'm doing project of circus. reply soon.
mail: dinhkli245@yahoo.com
thaks inf.
I think he has been tasked with building an FM wireless mic. for the Ring Leader to use at their elephant-go-round circus. Normally, he probably follows "behind" the elephants... good English isn't necessary! :rolleyes:
 

audioguru

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#70
=Miles Prower;829807]Still staying one step ahead of the RF cops?
I made the lousy original FM transmittter to prove that its audio preamp transistor is biassed wrong and that its RF oscillator frequency changes all over the place. Then I fixed its problems one-at-a-time.

The final one (mod4) works very well.
 
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