137kHz E-field probe mag-mount RX antenna

Some years ago I did some tests (in the car) looking to see where I could copy my low uW ERP 137kHz signal from home. Results surprised me, even with my deaf FT817.  I gave up on the far side of Cambridge (approximately 24km) with S/N still respectable.

This is all that you need to receive on the LF bands.

See https://sites.google.com/site/g3xbmqrp3/antennas/137efp.