My quesion is on selecting the values, for example:
440pF & 0.5UH will reasonate at 10.7MHz
220pF & 1UH will reasonate at 10.7MHz
110pF & 2UH will reasonate at 10.7MHz
55pF & 4UH will reasonate at 10.7MHz
My quesion is on selecting the values, for example:
440pF & 0.5UH will reasonate at 10.7MHz
220pF & 1UH will reasonate at 10.7MHz
110pF & 2UH will reasonate at 10.7MHz
55pF & 4UH will reasonate at 10.7MHz
A reference I have indicates that the reactance of the coil in a Colpitts oscillator should be around 140 ohms, so for 10.7Mhz, this calculates out as a 2uH coil.