With a do-over - don't know where I went astray before - I was able to get easily up to 2MHz, see shot on my very old / out of calibration 20MHz Hitachi Oszi. I even can get up to 8MHz - not smoothly, but in the end with jumps. So I will shoot some new graphs with 500KHz...2MHz MW AM Radio Band - same L, but band fitting variable capacitor for tuning. Stay tuned.
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