Hey no problem because I screwed it all up when I initially posted it.
These formulas are all sorts of complicated. grin

73
Scott/N3BYY
On Jan 18, 2012, at 8:29 AM, David thurmond wrote:

> All,
> 
> Sorry for my previous post, I previously stated that 1 picofarad = 1 x
> 10 ^ -9 Farad, which is why my calculation was wrong.  I also screwed
> up entering the units on the calculator, so I should have
> double-checked my work!  I believe this is correct, however:
> 
> The formula is:
> 
> Resonant Frequency (Hz) = 1 / (2pi * sqrt(L C)
> 
> where L is in Henries and C is in Farads.  So, in your example:
> 
> 1.  Convert 50 microHenries to Henries, 1 microHenry = 1 x 10^-6
> Henries, so 50 microHenries = 5.0 x 10^-5 Henries.
> 2.  Convert 200 picofarads to Farads.  1 picofarad = 1 x 10^-12 farads,
> so 200 picofarads = 2 x 10 ^ -10 Farads.
> 3.  Now, plug into the formula:
> F = 1 / (2pi * sqrt (5 x 10^-5 times 2 x 10 ^ -10)
> = 1 / 2pi * 1 x 10^-7
> =1591557 Hz
> 
> Hopefully this is correct now, and hopefully I did more than just
> muddy up the waters beyond all hope!  My apologies!
> 
> So you can see, the worst part of this problem is getting the units
> correct, at least for me.
> 
> 73,
> 
> David Thurmond, KK4ADV