Here is an image of what is coming out of the other end of the tank. Clearly the current in the input coil was not just fine.
I never try to directly measure anything within a CL or RCL series circuit because the results will usually be erroneous. Instead I measure the AC voltage across the circuit, calculate the impedance, then calculate the current.
Unless you think that the impedance of the CL circuit is rapidly changing while the frequency is constant, the plate voltage is going to have the same waveform as the current.
I never try to directly measure anything within a CL or RCL series circuit because the results will usually be erroneous. Instead I measure the AC voltage across the circuit, calculate the impedance, then calculate the current.
Unless you think that the impedance of the CL circuit is rapidly changing while the frequency is constant, the plate voltage is going to have the same waveform as the current.
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