NXP is conducting a Homebrew Design Challenge for designs featuring their new LDMOS RF MOSFETS the 100W MRF-101 and the 300W MRF-300. Unfortunately, I just found out about this today by a post on reddit’s /r/amateurradio by Jim, WA2EUJ.
He writes:
The MRF-101 will completely revolutionize HF homebrew. It’s a TO-220 package that makes 100W, say good-bye to IRF amps.
My entry for the NXP Homebrew RF Design Challenge is a 100W, 1.8-54MHz amp on a 2″ X 2″ circuit board cooled with a CPU cooler.
Here’s his video:
You can find more detailed information about his entry here. These transistors do look very cool. Unfortunately, the challenge ends on October 31, so if you’re going to do this, you have to do it quickly.
Thanks to this video I found out about the competition and put together my own entry, a 600W broadband amplifier with high efficiency.
Check it out: https://qrpblog.com/2019/10/a-600w-broadband-hf-amplifier-using-affordable-ldmos-devices/