Roger G3XBM's (Mainly) Amateur Radio Blog

This evening I've been setting up my on-line grabber again so that I can monitor VLF, LF or MF activity and upload what I am receiving t...

There are some very neat ideas for simple LF receivers around that make use of programs like Spectran or Argo effectively as the second IF a...

This is the Argo waterfall plot showing the Czech 505kHz beacon OK0EMW on QRSS3 (slow CW, 3 sec dots) coming in well tonight at 1700z. It wa...