First things first -- what are the design goals? V, I ratings? Switching speed / edge rate? Frequency / rep rate? What is the load? What will the layout look like? What is the supply, will it care about noise? How much, in what frequency bands?
Maybe some of these components are important, and we can't possibly know without a deeper background on it.
The graded series of capacitors are almost certainly inappropriate, as is the case in general, but likely don't do anything here.
A coaxial connector, driven at 24V, seems like something that would be either an embarrassingly weak load for a 10A transistor (even the '3055 in the schematic), or an inappropriate choice of connector giving an inductive load (for Z < Zo and F ≪ λ/4, a transmission line looks like a series inductor) and thus the lack of ground-to-output catch diode is problematic. But that's only a suspicion without further information on what this thing is actually doing.
Tim