Letters to the Editor
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Walter
"And yet, the exact value of Plank's constant cannot be determined, because it is necessarily derived from measured quantities, and those measurements are subject to the Heisenberg Uncertainty Principle."
If you remember, I said that it is not directly affected. And you agree with that.
However, what you now say must be limited as well. Random errors due to the HUC in the measurement of a constant can be reduced by repeating the measurement many times and averaging the results, since the errors are independent. There are other sources of error as well, and so there is a limit as to how many you need to reduce the HUC errors to negligible.