I'm designing something that uses three L-C oscillators running at a few hundred kHz and would like to place them all on a single compact pcb. Frequency-wise, two of the oscillators will operate within 1% of each other while the third one will run about 50% higher. The signal levels will be no less than several millivolts at any point, probably much higher.
As usual, I have a limited choice of materials to work with and the inductors I have are unshielded CD75 SMD open drum cores. A rough draft of the pcb layout places them within a couple of centimeters of each other. Is this likely to cause problems from cross-coupling without my having to improvise shields for each coil/oscillator?
I know the information I'm providing is rather vague. That's because I haven't worked out all the details yet.