[Elecraft] POW Receiver

[Stuart Rohre]

Frank,
There are steel blades still sold at Home Depot for painting clean up of 
windows.  Single edge razor blades.

Now if the school official "crazies" won't stomach those, you can simple 
substitute some plated metal or even a rusty slip of steel.  I wonder if a 
scrap of blue banding metal tape would work??   You are looking for the 
surface of the steel to be plated and that creating a dissimilar metal 
junction and hence a diode.  You could also simply sub a 1N34 glass diode.

I wonder if you could grind off the sharp edge of single edge blades to 
still use them?  They have a metal clamp piece that could be held easily by 
vice grips to present the sharp blade edge to a grinder wheel.  The sweet 
spot on the old blades was reputed to be along the engraved logo on the 
blade.  I am not sure the mass produced import blades sold for paint 
scraping still have an etched logo or name section.

Stuart
K5KVH