Originally Posted by
SteveC68
Wouldn't they allow some AC to travel both ways?
Thanks,
Steve
Yes actually they will, but at 50/60hz the capacitive reactance (in ohms) is high, Cap Reactance is frequency dependant, so these cap's would come into play if high frequency spikes or noise appears on the B+ line.
Also you will notice, for the same reason, there is a small cap C1 across a large electrolytic C2, this is because large Electrolytics can posses some inductance, the small cap will effectively short circuit this at high frequencies, Once you get into radio circuits , you will find that a short piece of copper wire can become an inductor at the right frequency.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.