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Hello,
Did you read this article on the colpitts oscillator?
http://en.wikipedia.org/wiki/Colpitts_oscillator
Greetings,
Bertus
Did you read this article on the colpitts oscillator?
http://en.wikipedia.org/wiki/Colpitts_oscillator
Greetings,
Bertus
The top of L1 should be connected back to the bottom of C2 via something like a 1uF ceramic or plastic film cap.
As shown, the main tuned circuit, whic consists of L1 in parallel with C1+C2, is 'broken' by having the electrolytic decoupling cap in series with it.
Electrolytics are great for bulk power storage and audio stuff, but useless at RF.
You need to bypass the power circuit with a cap that has very low impedance at the frequency you are working with.
Keep all connections absolutely as short as possible!
As shown, the main tuned circuit, whic consists of L1 in parallel with C1+C2, is 'broken' by having the electrolytic decoupling cap in series with it.
Electrolytics are great for bulk power storage and audio stuff, but useless at RF.
You need to bypass the power circuit with a cap that has very low impedance at the frequency you are working with.
Keep all connections absolutely as short as possible!
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