I stumbled upon this nice video and thought I'd try to reproduce the experiment. Basically the video shows how to build an AM transmitter circuit using an opamp, some resistors and a capacitor. This is the circuit schematics for the oscillator that should generate the carrier wave:
The carrier wave should be at the OUT node right? My problem is that I do not understand how can this circuit oscillate since it is getting constant voltages as input and the video does not say anything about any function generator. My guess is that instead of 9 Volts in the voltage divider I should use a function generator with the carrier wave (possibly a 9V sine wave). Am I right or did I miss some component/key concept? Also by simulating the circuit with the potentiometer set to 0 on LTspice I get no oscillation at the OUT node but just a constant voltage (as expected) of 3.6V.
EDIT: the circuit should work in the 300kHz - 1.2MHz range