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LDMOS Amplifier for 630 meters

More RF testing

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August 17, 2019

Did some more RF testing

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Schematic

September 10, 2019

Here's the schematic. It took 10 revisions to get everything working to my satisfaction.

A few changes

August 26, 2019

Made a little more progress on the LDMOS amplifier. I added 4200pf of capacitance to one part of the output circuit and picked up some output power. Now I'm getting 150 watts out at max power. Half way there

Negative feedback installed

Getting closer to putting RF to the beast... I have the negative feedback circuit installed. A few more connections, then test it with a 48 volt power supply, then do some voltage and bias measurements.

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