Mark Keith wrote:
"Brian" wrote in message hlink.net...

I'm guessing 10-365pf would cover the majority of the broadcast band.


Brian


I bet it takes double that. He will need a "dual" 365pf cap to cover
the whole band with one cap,


Resonance in a circuit happens when inductive reactance equals
capacitive reactance. They're both measured in ohms. There is NO
magic capacitance for covering the broadcast band. The PROPER
capacitance is the one that matches the antenna/coil over it's
intended range.


So, resonance occurs at:
Xl = Xc

That can also be said as:

f = 1 / [2 * pi (sqrt LC)]

http://www.electronics-tutorials.com.../resonance.htm




mike