Driver Stage Rev1
The only reason this is being presented is that this deisgn shares the same circuit architecture as the Bi-Directional Stage save for the change in the Emitter resistor and no steering relays. The Emitter Resistor is changed to 4.7 Ohms. This stage is not "ON" all of the time so only gets hot during transmit. You will need a double hatted clip on circular heat sink!
The three photos below show the schematic, the physical build and the inetgration with the IRF510 Final Amplifier.