Hi Nicolas
With this Lrl the frequency is about 3Mhz, with the Lrl with the self oscillating mode the frequency is about 5Mhz, then the frequency is not very critical, but perhaps it's critical the LC tank, Rubin had changed L1 with a squared coil with same inductance but with no result. At the present I want to build a PI with a large coil to verify some signals.
Best Regards
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