so i've been mostly a 40m and 80m guy for years because honestly the higher bands just felt dead whenever i checked them. but yesterday afternoon i was just spinning the dial on 10m kind of out of habit and suddenly there were signals everywhere. worked a couple stations in Brazil and one in Spain without even trying that hard, running like 50 watts into a dipole.

been checking the solar flux numbers on and off and i know we're supposedly in a decent part of the cycle right now but i never quite know how to read all that stuff properly. like i see the SFI number and the K index and A index but im not always sure what combination of those means i should actually bother jumping on the higher bands. is there a rule of thumb anyone uses or do you just check the DX clusters and see whats actually happening

also curious if anyone else has been seeing good conditions on 15 or 12m too because i havent spent much time there

yeah 10m has been really good on and off for a few months now, we're climbing toward the solar maximum so the SFI has been regularly getting up into the 150s and even touching 200 on good days. the simple rule i use is if SFI is above 120 or so it's worth at least checking 10 and 12, and if the K index is 2 or below the bands are generally behaving themselves. when K goes above 4 thats usually when things get rough regardless of how good the flux is because of geomagnetic disturbance messing everything up.

15m has honestly been my favorite lately, the openings to Europe in the morning from here in the midwest have been pretty consistent. give it a shot, you might be surprised. 12m is kind of the sleeper band that nobody monitors so when its open you can work stuff with almost no competition

oh man i had the same experiance last week on 10m, i'm pretty new to HF and had basically written off anything above 20m because every time i checked it was just noise. then my buddy texted me saying hey get on 10 right now and i worked like 15 countries in an hour. i had no idea it could do that. i've been trying to learn about propagation since then but theres so much to it, like sporadic E vs F2 and all that. still wrapping my head around it honestly