You have a right to toot that horn a bit. was the post that got me started with this whole crazy obsession back in November. I was looking for any information I could find about how to make my 603s sound better and this was the post that really lit a fire under me. Since then, I've completely destroyed a 603s, bought two more used and re-implemented them with better components and replaced and re-biased the JFETS. They now sound "better" but I needed more.
I found Scott Helmke's "Alice" mic through your blog and got super inspired. That led me to Jules' OPA Alice but I do things the hard way and wanted a front-address mic to stick under the bridge of my contra bass. I've been iterating on that for awhile and am narrowing in on a prototype using my own PCBs, 3D printed parts, brass tubes and copper mesh. It sounds pretty good but there is still measurable distortion in the mids because I was just guessing on the PCB design. It sounds better than the 603s mics I modded and I'm pretty sure this next PCB design is a lot better, after studying up on it. Now I'm thinking about building an OPA into an MXL 990 with an RK47C capsule. Like I said. I'm obsessed.
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I've come pretty far in 3 months but there is so much to learn. The breadcrumbs of information left by you, Matt and Jules are like beacons of light to me and I really appreciate it. There really are not many good resource for this information -- especially in the age of ChatGPT.
