You said:
Here is a link to pictures of my tomato's. I was wondering if the
brown
leafs are normal or if I am doing something wrong. Maybe they are the
determinate and starting to die?
http://kevinandrews.com/Tomato%20pics.htm
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Kevin,
I've examined the pic of your plant with yellowing and browning
leaves. I've been plagued with this problem for years and it looks
like classic early blight, though early blight frequently includes
black spots on the yellowing leaves as an additional symptom.

My primary point to you is that the active ingredient in Daconil is
Chlorothalonil. Bonide's Fung-onil uses the same active ingredient in
about the same percentage. I use either, whichever is available.

Others may have mentioned this; but the key to the use of these
fungicides is to use them as early as possible, and frequently. It
will typically not eliminate the problem, but will significantly slow
its advancement.

I believe others said that some varieties are much more susceptible to
this than others. This variation in susceptibility is also true of
wilt, which is soil borne and systemic and for which there is no cure.
I usually pull those plants. But you are not experiencing wilt. Wilt
is unmistakable in its appearance.

My modest input to you after years of the battles--open to correction
and input.
DaveH
Chambersburg, PA