What isn't mentioned is the fact that MOVs are rated by the TOTAL energy in Joules that they will absorb in their lifetime before they fail. The energy absorbed from spikes is cumulative and when the rating is exceeded, boom. They are also responsible for nasty noise generated by the crowbar action on the spikes in making them square waves - the sum of all possible harmonics. I used to have to deal with these things when customers would use them in front of servoamplifiers. The noise from the square waves drove us crazy until we found the MOVs and removed them.
-- 73.14159, Carl WCØV ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
