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.