KL7UW
144-MHz 1500W 8877 Power Amp



 
   This page describes the construction of a 1500-watt 2m amplifier using an 8877.  The design follows 
   the classic W6PO design which is described on W5UN's webpage.  I am using the Triode Board
   built by G3SEK.  I purchased the Plate lines and output tuning capacitors as a kit from Harry, WA4OFS(sk).

   Here are some photos of the amplifier under construction:  (click to see larger image)













    Block diagrams of the amplifier showing control, bias, and power wiring:  (click to see larger image)






















   QRO HV power supply acquired:
    

  • Schematic
    • 

  • Front and top views of the surplus HV Power Supply
 























   Here are photos of the assembled PA Control Panel (before wiring):
    

  • Front view of Control Panel.
    • 

  • Close up view of Meters.
    • 

  • Backside view-1.





















    

  • Backside view-2.
    • 

  • High Voltage Divider to provide HV detection & metering.
    • 

  • High Voltage switch.




















    

  • High Voltage Connectors.

















   Check back as I add more on this page.



   Return to 2-meter EME page.