[quote]You cannot avoid testing your actual circuit with an oscilloscope, and choosing a frequency based on that.[/quote] There -do- exist good design tools that allow for a comprehensive simulation of the circuit (thermal and electrical). That would let you examine signal propagation properties, and catch grave design errors. Unfortunately, the pricing of those tools is usually beyond the hobbyists (or individual's) reach. Additionally, keep in mind that an oscilloscope probe is already a significant load in this case. Perhaps the probe's HF settings (50 Ohm) would be more appropriate.
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