I have read of capacitor "speed" ...
I have read of capacitor "speed", but know little about it. I understand that a cap's speed is determined by it's capacitance and construction.
"Dammit Larry! I'm a chemist not an engineer!" - What, exactly do I have to measure? And how?
Here is the completed circuit (an instance of Aaron Logue's tunneling noise white noise oscillator.)
Change your paper chemistry filter when it doesn't let fluid go through I assume you have access to an oscilloscope:Measure the 1 MHz signal on the input side of the capacitor, lets say it is 1Vpp.Measure the 1 MHz signal on the output side of the capacitor, lets say it is 0.1Vpp.Install a larger capacitor.Measure the 1 MHz signal on the output side of the capacitor, lets say it is 0.9Vpp.The coupling capacitor size is probably okay now..
I think that's the one that changes over time; something about wear-and-tear. If it is, the whitening algorithm used for atomic decay is the best choice. (That is, if you plan to use it for generating random numbers.)