Just finished my calculations for my secondary coil and it will be a whopping 76cm in diameter! I am going with 1000Kc/sec Frequency.
I finished the work on the wooden bases and supports, all that is left is to bake and laquer them before assembling.
My extra coil's diameter/height is going to be 30cm.
Some calculations with other stuff is still going on, but I'm going to build two identical coils of the exact same size, one for overground Hertzian wave reception and the other for underground Tellurical wave reception.
The coils will be identical but the setup will be different as the goal is to light a 100W lightbulb with the other coil.
We'll see how things go once I have built them.