coupling cap's PLEASE HELP!

[mscoffman]

thanks Talath that helps with the "standard" calculations i just also need to get my head around the mechanics of how the ac is allowed thru and how the cap rating may effect the frequencies. if at all

for example if i use a 100pf cap or a 1uf cap how wud that effect the circuit 

the general arrangement im thinking of is antenna - cap - ground

please anyone 

Yes, you can think of the capacitor as a hydraulic gas accumulator.

If you push gas into one "pole" the gas in the other pole
comes out. If you "ground" the second pole then gas
pushed into the first will push back out with a certain
pressure and keep trying pushing back out.

Capacitors are used with resistors and inductors to create time
delays, timing elements, frequency and phase delays as well
to isolate dc voltage levels in different circuits from one another. You will
have to use some mathematics to use them in that way to get
exact answers. To some extent you can look at existing like circuit
schematics to get nominal values. You want to use a limited
range of values so that efficiencies of multiple components match.
This is called the "Q" (quality) of the circuit. Look in Wikipedia under
capacitors. There are math equations for everything you want to do.

:S:MarkSCoffman

[Doug1]

Your gonna have to wing it. May be fruitfull to start at the output desired and design tward the pick up.
Good reading but it leads to more questions then answers. Like ,based on the cap function cant you produce a bridge rectifier using them or an amp.