I held an amateur radio presentation at children’s summer camp in Pacug. I was using 20m dipole attached to roofs of two houses in N-S direction. When I connected everything, I tried to tune my YT-100 (tried tuning 7 MHz frequency with 20m dipole) and the tuning cycle was really long, nothing unusual, my impatience led to radio reset. Then the problems started, when I turned on the radio again, the LED light on YT-100 was blinking constantly, manual had no information about that issue. Internet provided answers about broken connection cable, but mine was brand new, so I tried connecting cable the other way around. Miracle, the thing worked :)