Hi
I have a limited knowledge of electric circuit design.? In the December Model RR magazine, Mr. Gartner discusses various circuits and electrical components.? In one circuit, he discusses the requirement of a diode across a coil to safeguard a component (PSXX) within the circuit (see link).? I don't doubt that the diode is needed but I would like to know how the PSXX would be damaged if the diode was not there.? What would cause the damage? I'm looking for more explanation so I can better understand how the circuit works.
/g/w4dccqa/files/Diode%20across%20coil.pdfThank you.
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Dave
Portland, OR
