Sinclair Radionics 1964 - 1975
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Sinclair Power supplies

• PZ2 (1965) to power Z12 amplifiers. a crude power supply - transformer, rectifier (probably a bridge, I do not recall) and a capacitor, so barely adequate smoothing.
• PZ3 (1965) to power Z12 amplifiers. Soon replaced the PZ2 but had a transistor Gyrator.
• PZ4 replacement for PZ3
• PZ5 (1969) to power Z30, Project 60 and Project 80. Unstabilised
• PZ6 (1969) to power Z30, Project 60 and Project 80. Stabilised
• PZ7 apparently the same as the PZ6. I do not know why the number was changed.
  • PZ7 PCB component side
  • PZ7 PCB copper side
• PZ8 stabilised high power supply for Project 80. It went though several redesigns. I have few details.