I recently posted a Youtube video about the radio I’m building, and I promised to share the LTSpice file. You’ll have to install LTSpice and the EPC GAN library to run it.
Here is the video: https://www.youtube.com/watch?v=zcixl9Ds5KQ
Here is the LTSpice Schematic:
Please note the included window function. When you take the FFT of the windowed RF waveform you’ll get a lot more dynamic range.
Let me know if you’d like a deep dive on the circuit. I could put a video together.
by
Tags:
Absolutely would be interested in a deeper dive, this project is fascinating from a technical analysis perspective. Hats off to you.
Thanks! I’m hoping to have some hardware to build this coming weekend, but hopefully the weekend after I can put a video together!
I’m curious about the SOA of the device you’re using, because I was thinking of doing something with a similar part but was stopped dead in my tracks once I realized that the SOA for continuous operation was much, much lower than I’d anticipated. But you have more electronics background than I do, so now I’m wondering if I’m misinterpreting the data sheet, because from what I can see it looks like the actual SOA for your component would mean much less output than 400 watts. I’m hoping that you’re right and I’m wrong, because that would mean there’s a lot more parts that can work for this application than I realized.
These devices are designed to switch lots of power. And the top side cooled parts + a heat pipe can pull waste heat away pretty efficiently, since it is higher at high frequencies. But you have to operate completely nonlinear, hard switched, with the surrounding circuit designed to block / shunt harmonics. And it is easy to get something wrong and blow your fets. And sometimes your fuse.
Leave a Reply