[Amps] Parasitics can kill

[k7fm]

"Hey, thats an excellent application for an otherwise useless item, a hot
knife for cutting foam."

And, the old Heath electronic switch, which was used to switch inputs to the 
single channel scopes, is a perfect box for the power supply to operate the 
foam cutting tool, along with the nichrome wire.  I used that arrangement to 
make a foam mold for a new fiberglass wheel well for my experimental 
aircraft.  Works nifty.  I have not had any parasitics since then.

Colin  K7FM