RG: typo!

[Mike Burgundy]

I found a nasty little typo in your parametric EQ article RG.
The center frequency of an LC combo is stated at the parametic portion of the article as
F=1/(2PILC) but should be 1/2PI SQRT(LC). The same formula is stated correctly at the graphic EQ bit.
For those interested, I believe Q=SQRT(L/C) /R with R being the total series resistance of the gyrator (so 470 plus resonance pot). Not that this figure gives much information