[Boatanchors] Re Fox Hole Radio

[J. Forster]

Glen Zook wrote:

> Unfortunately, the razor blades now produced do not have the heat treated
> finish that the ones during World War II had.  When you can find a "blue"
> double edged razor blade today that finish is primarily applied by a painting
> process.  It was the heat action on the blade that produced the chemical
> changes that allowed for the diode action.

Yes, the heat treatment produced an oxide coating. Remenber copper oxide
rectifiers for meters?

> Since variable capacitors were not common in the field, the circuit basically
> used stray capacitance and inductance between two coils to tune.

Two coils????

-J