At 05:03 PM 8/3/02 +1200, Jinx wrote: >Perhaps someone can do a similar explanation for >relays and switches. Relays sometimes have a label >that says something like "Do not break tab off before >cleaning", and the tab covers a hole in the relay case. >Why would you want or need air getting to relay and >switch mechanisms ? As far as I know, it is to eliminate pressure within the relay case that would otherwise occur as the relay gets hot. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 18 years of Engineering Innovation (1984 - 2002) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body