>The source impedence on your signal is a bit high.

K

>You have some capacitance floating around that is slowing transitions.


>Your R's are too high and you are not driving the transistors fully into
>saturation.

I have a feeling this is most of it. If you looked at the scope the signal
would be one or two pulses fairly clean then it behaves like it never
cleanly shuts off or over drives

>Q: Refresh my memory:
>1: source of signal

25ma source from a 74hc04 which is in turn driven by the pic. Everything
is perfect going in and coming out of the 04. I'm actually pulling two
identical
signals from the 04. Each separately goes to a 2n2222 then to the ztx851
and then to the load. Each 851 has a separate line to the power source.

>2: frequency of signal

2 pulses @ 1hz

>3: duty cycle of signal

total 20% - 2 x 100ms duration pulses with a 100ms low space between the pulses
then 700ms of low.

looks like (bad ascii art following....)    1010000000   or  -_-_______

I know there is a stoooopid simple solution to this but I've been staring
at it too long. ;-]

Dave

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