| Bikon SK4MPI ma 50 lat |
| Bikon SK4MPI ma 50 lat The old beacon SK4MPI made by The Max Plank Institute in Germany and managed by the Swedish Amateur organization SSA to study aurora is now having its 50th birthday. Here is a short video to show how the cw identification was made – no semiconductors just plain old reliable mechanics! https://vimeo.com/238666164 Web page: SM7DTT |