Comparison old preAmp now(bottom) and 1.5 years ago(top)
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Conclusion: the old preAmp is fine.
Let compare to the new preamp at full range:
New preAmp Fe-55 90/10 gas, 1450V, full ADC range (ch 4096 = +- 1V)
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and at half range:
New preAmp Fe-55 90/10 gas, 1450V, half ADC range (ch 4096 = +- 0.5V)
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