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Old 2nd June 2013, 10:32 PM   #31
diyAudio Member
Join Date: Nov 2004
Location: Florida
Originally Posted by JMFahey View Post
Well, it's quite the opposite.
What kills relays is not "worn coils" or something (never saw that ) but pitted contacts.
Applying *less* pressure than designed worsens contact and helps faster pitting.
Just sayin'.
The Startup capacitor provides the high pressure required to lock in the relay. Once it has closed, the holding current can be somewhat less and keep good contact.
You can call me Mad Professor, building crazy experiments in my Electronics Workshop
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