I first used my modified K6 to receive shortwave signals. It has two antenna connection ports (one SMA male - original, one SMA female), and after using the shortwave donut antenna, I switched to FM radio and replaced it with the original antenna. Initially, I could still listen normally. However, once I extended my finger to touch the SMA female connector and then released it, the original antenna would no longer receive anything. To be able to listen, I had to press my finger against the SMA female connector.
System number: LOSEHU132KS