If you can use LW radio. You can also use the VLF antenna (Loop or Ferrite)
E-Field antenna must sit outside - You can use either H-Field or E-Field or both
As the cables to the antennas often sit near other cables that interfere, we I set a limit of 30m - If the cable is free for nearby cables, it can easily be 40-50m
The resistance of a wire in 50m cable is 4.2 ohms, so it makes no noticeable loss.
/Richo
E-Field antenna must sit outside - You can use either H-Field or E-Field or both
As the cables to the antennas often sit near other cables that interfere, we I set a limit of 30m - If the cable is free for nearby cables, it can easily be 40-50m
The resistance of a wire in 50m cable is 4.2 ohms, so it makes no noticeable loss.
/Richo