For a couple of days, I have been trying to build Hartley oscillator on my breadboard based on this schematic:
Redrawn with components I chose:
And here is the scope output:
Yellow signal - point X of original schematic
Blue signal - point Z of original schematic
Purple signal - OUTPUT
Theoretically we have sine wave on the output, and the voltage on the two inductors is 180 degrees out of phase, but I feel like this is not OK. First of all, the amplitude of the output is too small and second, even more important, I expected about 800 Hz no 100 MHz (as you can see on the scope).
So the question is: What is wrong with my circuit?