gunrunnerjohn posted:I think with several hundred ohms in series with the diode and the low value resistor in parallel, you'd lose virtually all your DC offset. The buffering resistor would have to be considerably lower to allow enough DC to keep the whistle going.
well kirchoffs law tells us how each endpoint of each component behaves.
The DC value will vary by the current thru it and the current will always be proportional to the current thru the shunt. If we had an ammeter in series for some locomotive load and found out what the engine drew, we would know that every wire has that amount, and in the parallel section the diode (if equipped with a dropping resistor) would see its share of current in the reverse ration of its resistance to the shunt. this would be a pain to measure and the resistances I took from the Cu discs should not be considered the final answer...from my reading it appears the mono-crystalline structure of CuO, while it acts as a semiconductor, does not behave like a typical semiconductor so a lot of my tests have questionable value.
