This is the final section of the Elenco AM radio (FM to follow). Testing and tuning if the oscillator and antenna section are completed along with a overall system test.
There is a mistake in the capacitance claculation - it should be
1/((1/C1)+(1/C2)...)
I did find the oscillation problem - it was the audio amp itself. I replaced it with the transistor amp, and voila, no oscillation.