I'm looking for an old short story or possibly a book, more than 30 years old, probably a lot older, about spaceship heading to some planet, possibly Venus.
The previous ships have not been heard from after landing. On the way a teenage boy (possibly a stowaway) has a brainstorm that if the planet was surrounded by an electromagnetic field, then the other ships would not be able to communicate even if they landed safely. They take precautions to protect the ship against this possibility and of course the kid is right.
The story I'm describing is NOT The Callistan Menace by Isaac Asimov.