On 8/15/21 10:04 AM, Joe wrote:
What about connecting the amplifier to a dummy load thru an antenna tuner. Tune for minimum SWR. Then use the Nano to read the impedance of the tuner/dummy load?
Joe
That's more about measuring the amplifier's output impedance, I think the OP is looking for amplifier input impedance.
Here's what's great about the NanoVNA - There's going to be people who figure out how to make high power measurements with it, what sort of "test set" is needed.? Maybe modified versions perhaps.
And someone is going to come up with clever inexpensive ways to do this with "reasonable" accuracy.
But there's been a lot of discussion over the years about what the actual output Z of a transmitter is. (often with long threads about Thevenin matches, arguments about efficiency, the limitations of simple models, etc.).? Hey, now we're close to being able to *measure* it, at different output powers and into different loads.? This is way cool.
See, e.g., Maynard Wright's article in QEX a couple months ago.
