I decided to design a Colpitts oscillator with an output frequency of 1,2 MHz followed by a buffer stage. No other specs for the moment.
I would prefer to keep unchanged the coil (I got it salvaged from old radio gear) and the transistors while using a +9V PSU.
Once having it working I would like to be able to adjust (vary) the frequency and increase/decrease the output voltage. How much? No idea.
I am most concerned about the value of C4 and the DC coupling to the buffer but I would be not surprised if I am told that the whole thing is just a piece of garbage.
Prior to starting soldering I would appreciate any comments / suggestions.
I would prefer to keep unchanged the coil (I got it salvaged from old radio gear) and the transistors while using a +9V PSU.
Once having it working I would like to be able to adjust (vary) the frequency and increase/decrease the output voltage. How much? No idea.
I am most concerned about the value of C4 and the DC coupling to the buffer but I would be not surprised if I am told that the whole thing is just a piece of garbage.
Prior to starting soldering I would appreciate any comments / suggestions.
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