Hi
I make this video for members who have made this project. Here is the method to tune your PDK and oscillates, upon a well-defined frequency by yourself in using capacitor parallel with the coil and Gain Potentiometer 20K.
http://www.youtube.com/watch?v=yzjPAaQ5pS0
Note I do this test on a part of my V41 KING LRL up well for you as it works on a passive receiver which is part of the PD Alonso amended
good luck to all the guys