Hi Stefan, thank you for this extraordinary report! This is really fun, even though the Hell stuff may still involve a bit of gXXXXwork ;-) But beware you've been caught speeding... There is clearly
LF, I've been on a tour in Freiburg over the weekend and just back home. It was possible to check my modified GSM external car antenna (with a magnet foot), modified as an active antenna for 137 kHz.