On 11 Oct 2014 16:25, "Didier Juges" <[email protected]> wrote: > If I could get 1200W by combining two 300W amplifiers, I would now be retired and very wealthy indeed. > > Unfortunately, there is no free lunch and unless somehow the Gun oscillators were delivering more power when connected to the magic T (maybe because of better matching) than when measured individually, combining two X W sources will only give you, at best, 2xX W, or 3dB more power.
I see you don't get something for nothing - we are not taking about perpetual motion. I can see a few possible explanations. 1) Instrumentation error. 2) Better match - but that seems unlikely as I would have expected people to have tried countless way to improve that. 3) Injection locking causes the Gunn diode to oscillate in a different way, perhaps using different energy levels in the doped semiconductor. The fact that they have become frequency locked, indicates that their mode of operation has changed - they are not operating in the way the text books say that they do. About 2 decades ago I did an MSc in microwaves & optoelectronics. At that time I had a pretty good understanding of how Gunn diodes worked, but I have since forgotten the details. But it doesn't seem totally impossible that the mode of operation changes to one which is more efficient. > It does not matter what the combining structure is, magic T, coupler or else. I understand what you are saying, but it is hard to dismiss the possibility it is true given several people have observed this. Just because it doesn't fit into our established theories, doesn't mean it can not happen. It is not breaking any laws of physics - the overall efficiency is well below 100%. > Didier KO4BB Dave G8WRB. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
