considering a simple Vbe multiplier type bias spreader, how does one determine the size of the bypass cap. Cordell's book shows many examples with 10uf, but I can't find how that number was reached. I assume it needs to be a pretty good sized cap, but I want to know how to calculate it. Surely it can't be as simple as 2pi*the divider resistances*the freq I want to pass. Intuitively I feel the transistor matters in the calculation too, but I can't see how to do this.