Alfred Gomes' video about adapting external coils was cool except I do not have an impedance analyzer...
Are there less expensive ways to characterize external coils for the Rp parameters? I have access to digital scopes (Lecroy 1GHZ+), impedance meters (handheld and Sencore LC102), and function generator to maybe 2MHz.
I would like to experiment with adapting to existing or homemade metal detecting and pinpointing coils. These existing coils are designed for a variety of detector architectures - pulse induction, and a variety of frequencies (the pinpointers usually have a ferrite core).