Vox Slave Driver - serial number 1001
"Vox Sound Limited", mid 1971
For pictures of serial number 1001, see this page and the pages linked from it. Related units along with a further "Slave Driver" - serial number 1002 - are registered here.
The design of these amps marks a significant advance over the earlier solid state range (Conqueror, Defiant, Supreme), greater negative feedback improving the sound.
Thanks to Pete Kappa for the schematic drawings of the circuit below:
Schematics
Power section.
Preamp.
Preamp with layout.
Preamp output with modified circuit.
Power section driver board
Overview of the supply.