been simulating some diode transistor logic designs and something is not right--none of the T or JK flip flops i am inputting are working.

the electrical characteristics of these transistors and diodes does not look right, and many second stage gates are not being properly driven by first stage ones.

hmmm...

could be impedance issues (ie fan in/out)

it's lucky i am simulating first, i would have wasted a lot of time otherwise