SWR Filter

I wanted a nice simple PCB for SWR detection, without all the design hassle. I found this in the shared project files, it has the benefit of a filter. The the inductor values easy enough to figure out with the capacitor values and frequency known, I let co-pilot do the calculation. That gets me in the correct ball park, As a ballpark:" like ~20 nH: Wire: 0.8 1.0 mm enamelled copper coil diameter: about 5–6 mm. Turns: roughly 3–4 turns, close‑wound, then slightly spread to trim the inductance and for a bit lower value (say ~15 nH), use the same diameter with about 2.5–3 turns. You can then spread the turns to reduce L (and push the cutoff up) or compress the turns to increase L (and make the filter a bit “tighter”) The plan is to use this in conjunction with a ESP-32 to create a digital meter. This board was perfect! Exactly what I ordered and fast shipping.