At 09:30 AM 10/23/2006, Ken Kopp wrote... >The following is from a NASA-certified solderer ... me. (:-)) > >Contrary to the belief/practice of many, component leads protruding through a >solder pad should NEVER be cut off flush with the board. They should be cut >off at a length that is several diameters of the wire ... at least ... above >the board.
Time for a refresher class. According to the current standard, NASA-STD-8739.3 w/Change 2, December 1997, Section 8.5(.3) ( http://www.hq.nasa.gov/office/codeq/sldrbch2.pdf ): "Straight-Through Lead Terminations. Part leads terminated straight through the PWB shall extend a minimum of 0.5mm (0.020 inch) and a maximum of 2.29mm (0.090 inch)" .020" is one lead diameter for a 1/8W resistor, and can be less than one diameter for larger parts. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
