Electronics Forum | Fri Dec 21 10:12:46 EST 2007 | ck_the_flip
Operator, Think "opposite". You actually want to MINIMIZE the ramp-up rate. Think about 2 - 3�C per second as your upper limit for ramp up. You don't want to go more than 4�C per second for thermal shock reasons. All of this, of course, depends
Electronics Forum | Fri Sep 26 12:16:52 EDT 2008 | bickt
you cannot swap 0-3 only 0-1 or 2-3 they are not the same euro cards. they function very diffrently. if you look you will see there are more chips and circuitry on one set. there are 2 w/red leds and 2 with green leds. at least thats how they soo
Electronics Forum | Wed Oct 01 19:23:52 EDT 2008 | paligora
It depends on the usage , if it is regular and steady, only order when needed , we only order 2 jars when the last one is taken out of the fridge.One jar would last us about 2-3 weeks and it stays on room temperature. Ofcourse , you need a realiable
Electronics Forum | Tue Dec 02 07:56:40 EST 2008 | realchunks
Wow, rocket science with Nasa specs! I like it. I don't see the trick question here, so I'll continue.... IPC simply states over hang of round or flattened (coined) leads is acceptable (class 1, 2, & 3) if it "does not violate minimum electrical c
Electronics Forum | Wed Nov 19 06:02:22 EST 2008 | caerleon
Hi all, I have been in the game for near on 15 years and finally something has stumped me! As this site has always provided a wealth of knowledge and at times some amusement I have decided to post it here. Ok. My company uses a test method on an Om
Electronics Forum | Wed Nov 19 13:16:54 EST 2008 | sjpence
Simon, The equivalence factors were used to scale the values measured by ionic testing equipment to the values measured in the standard manual method. There is a good write-up by Bill Kenyon in this Technet Post describing the creating of the facto
Electronics Forum | Tue Mar 31 05:26:14 EDT 2009 | d0min0
Hello, we had similar problem in the past - when we had to change PCB supplier from a batch of hundreds of boards (NiAu plated, SnPb process) we got 2-3 boards with paste wicking to components leads what we did, was to check the thickness of gold on
Electronics Forum | Wed Apr 08 11:33:51 EDT 2009 | 1036
2) STD FR4 material with HASL finish, 4 layer board. Reflowed under tin-lead temps with another 4 layer board same time(no delamination problem). 3) We uasualy do not pre-bake board unless board is too old. 4) We do not have the board on hand right
Electronics Forum | Thu Jun 04 17:32:20 EDT 2009 | bigdaddysoy9
If you are talking about assemblies, Class 1 is like cheap toys or something you wouldn't expect to last very long. Class 2 would be components for a television, air conditioner, automobile (except safety critical). Basically, things that you would b
Electronics Forum | Tue Aug 04 10:36:28 EDT 2009 | kpm135
I haven't been able to access any old forum posts. Searching gives me a selection of old posts but every time I click on one I get the following screen: Internal Server Error The server encountered an internal error or misconfiguration and was unab
