I was on 40m #JS8Call when OH8STN sent Heartbeat message from few kilometers away. It was overwhelming my RX and I managed to catch a screenshot.
His message was sent on frequency 889Hz, but we can also see signal harmonic on 1778Hz (2 * 889Hz) and 2667Hz (3 * 889Hz).
Also notice how the width doubles on 2nd harmonic (1778Hz) and triples on 3rd harmonic (2667Hz).
Maybe this doesn't have any other point, but to show how harmonics look like on waterfall.
@M0YNG Indeed! It took me a while to understand what's happening. What I don't know if why is it happening.
From these little things we can learn and build our knowledge.
How does the signalink not reduce the tx power? Of course it does. I always have a power meter running btwn transceiver and antenna when I am in digi mode. And I really hate fiddeling with the tiny nobs of the signalink. But I always reduce the output power to 10-35W, depending on the mode. I never touch the radio.
As you all know, digi doesn't feel like the 'real thing' to me when being on the radio but being a witness of the arms race of power increase feels ridiculous. To get a rare DXpedition station, people are ready to run 1KW in FT8.
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