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