A year later...
While I was digging around last weekend researching pickups and electronics, I found that Lemme article. Really cool way to help see what you hear in a pickup. Even if it's not perfect, you get a sense of where that resonance is. More useful than a DCR reading at least. I'm surprised I didn't find more related threads on TB. It sounds just like the thing that'd get people's attention here. (At least it would in the Amps forum.
Here's another interesting link I found. Repurpose an old hard drive's coil to drive your pickup. http://valvesphere.blogspot.com/2012...frequency.html
Wonder if it's better or worse than using a cheapy guitar pickup off ebay. (I'd suspect better.)
I hope to get a testing setup like this going when I get all my parts together for the next build. Should be fun to play with different circuits and scope 'em to see what's happening. Again, not AES level, just to see how the pickup's RLC interacts with the components.