Bill, While all you say is true, the inductive 'kick' should not be larger than 2 times the applied voltage. That is still a safety margin of more than 2.
73, Don W3FPR Bill Miner wrote: > Don & John, > > When a relay is de-energized the voltage developed from the collapse > of the magnetic field can exceed the source voltage by many times. > > In the past it was the convention to put a reverse polarity diode > across the relay coil to absorb the energy when the relay is de-energized. > > Since Elecraft dose not use the reverse polarity diodes in any of > their kits I assumed this function was built into the relay driver > chips. If not, perhaps a higher voltage rating for C13 and other > capacitors like it is called for? Or could the relay driver U2 be > defective? > > 73, > Bill - K6WLM > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
