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
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