For my first experiment I created a 25.5 Turn Inductor with a single 5mil spiral trace, 12mil centre-to-centre spacing, within a 1 inch diameter. The tuning capacitors are soldered to the upper two pads.
A Tuned Tank Circuit
Note: it is difficult to see the spiral with the naked eye, it is just a blur of shiny copper.
This is the Centre of the Spiral Conductor
My goal was to resonate at my favourite QRSS frequency of 10.140mHz. With the help of a 47pF cap and a parallel 4-50pF trimmer, resonates was obtained on the desired frequency.
I thought the distributed capacitance of the spiral and of the 32mil double sided PCB would kill the Q of the circuit, but it seems to do well as indicated on an AIM-4170B Analyser. But, this will need more investigation.
Scale = 8 to 12mHz
I may have to plan a project using this technique for the tuned inductors.
As I have time, more experiments and information on Printed Inductors will follow!