Electronics Forum | Thu Apr 01 12:31:39 EST 2004 | russ
one more thought on this, When these boards are built new do we not have solder paste on the ground pad and then reflow? Has this caused any misregistration for you? I am assuming that you are not pasting the leads with the ground pad correct? I
Electronics Forum | Thu Mar 31 23:14:18 EST 2005 | Steve
Russ if your asking me if covering the surface of the granite defeats the purpose then I'm lost. An ionizer is a very good suggestion but they are not inexpensive. If the table is grounded and the metal bars are on a grounded mat, laminate etc. then
Electronics Forum | Fri Dec 16 11:32:49 EST 2005 | rlackey
We did some research a few years back, but you do have to test them regularly and replace them. http://www.twclean.com/debugging.html Here's Topline's justification (but then again they do sell them): ESD coats are required primarily for 3 reason
Electronics Forum | Fri Nov 15 11:03:48 EST 2019 | rgduval
I think Steve is on to it. The wire is not getting hot enough to wet. Either the solderer is attempting to solder too quickly, or the PTH is connected to a ground plane. The solder sticking up through the hole leads me to think it's connected to a
Electronics Forum | Tue Aug 04 14:06:59 EDT 2020 | stephendo
Are you sure it is not a 240V transformer with a center tap? That is how residences are wired. If you use the center tap you get 120V. The other tap to center tap is 120V that is 180 degrees out of phase. So if you use the two outside taps you get 24
Electronics Forum | Tue Aug 04 14:28:39 EDT 2020 | ttheis
Yes, I am certain it is 240 corner grounded delta. It confuses many electricians and it took me some time to understand. It is fed from a 480:240 delta 200A transformer. As I mentioned, they have a lot of Bridgeport 3ph machines and cnc machines conn
Electronics Forum | Wed Feb 05 15:16:15 EST 2003 | davef
If the voiding is not related to entrapped air in your vias, consider trying a different paste.
Electronics Forum | Thu Feb 06 09:53:38 EST 2003 | genny
Actually, the most common reason I have seen vias in pads is for grounds in RF applications where the frequencies are high enough that you need a ground RIGHT THERE!... not .1" away. Vias and traces have RF properties of capacitance and inductance,
Electronics Forum | Wed Aug 13 12:58:32 EDT 2003 | babe
Lets try this again, Every shelf system should be grounded individually. Every six feet per EOS/ESD requirements. Do not daisy chain anything. Secondly, Depending on the depth of paint,style of pain that your shelving system has. A static charge woul
Electronics Forum | Mon Jan 26 03:45:37 EST 2004 | Vinny
Hi All, We are producing a veriety of RF related PCBAs in which we see Unsolder/Mislaigned on a regular basis. In these baords usually one of the pad is connected to a signal trace and the other pad is connected to very huge ground plane. This gro
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