3 kW linear amplifier with four ART1K6 LDMOS fets
Circuit boards of the RF part
Drilling holes in copper plate
Fets soldered in a cooling plate
Two RF modules with a heatsink
Each module is tested separately
Four modules with cooling plates and combiner and divider
RF amplifier unit and power switches
UI at rear panel
Simulation vs. real world
Diplexer looks good!
20 m Diplexer
Output without diplexer
With diplexer.... 3rd harmonic -50 dB@ 2 kW...
Dummy load spectrum
6-band HF diplexer
Test at 1,5 kW per band
40 m without filter and with filter
Need more attenuation for 3rd harmonics at low band.
Thermal cam tests
9 kW 50 V three-phase power supply
Arduino controller on board
Power switch V2.0
TO BE CONTINUE....