Electronics Forum: (4) (Page 617 of 662)

Power problem on radio circuit

Electronics Forum | Fri Sep 13 10:59:35 EDT 2002 | Simon Davis

Hi Folks, This is a totally speculative, if not cheeky post. I know very little about electronics, but I think you guys do. I have a problem with my car radio, that I'd really like to solve, as I cannot buy a new one where I live (Brazil), and I th

Solder mask registration

Electronics Forum | Tue Oct 01 10:47:45 EDT 2002 | davef

Board fabricators purchase laminate in preferred panel sizes, such as: 16 x 18 inches, 18 x 24 inches, and 21 x 24 inches. A larger panel size provides more effective cost per unit area processed. In producing a board, the fabricator requires maybe 3

Rating SMT Machines

Electronics Forum | Mon Oct 28 08:05:41 EST 2002 | Bob...

Not saying anything new here. I agree with all the comments posted. I have worked in the industry for over 20 years and have experience on all but Mydata. Which machines are you looking at? Fuji CP3’s were too maintenance hungry, CP4.3’s bullet pro

best buy? (printers)

Electronics Forum | Mon Nov 04 17:29:34 EST 2002 | pjc

Cannot comment on "best buy". You'll have to determine what the better machine is for your application and duration of planned use. I suggest taking a field trip to each vendor's nearest demo facility with a few of your most hi-tech boards and stenci

Bare PCB baking

Electronics Forum | Fri Nov 22 10:38:30 EST 2002 | slthomas

The follwing is from the Technet archives, per IPC's Jack Crawford. I dug it up during some investigation of a supplier's issues with humidity in an Asian plant: There is support for this in IPD-HDBK-001 w/Amendment 1 Handbook and Guide to Suppleme

Conformal Coating

Electronics Forum | Fri Dec 13 10:23:55 EST 2002 | davef

Bright ideas??? Bright ideas!!! I got bright ideas. In order of decreasing luminosity: * Stop installing the socket, solder the PLCC to the board, dip the board. The socket is a waste of time and money. You never replace the PLCC in the field, a

PTH Hand Soldering and Rework Training

Electronics Forum | Tue Jan 14 20:32:41 EST 2003 | davef

There's just about 4 beezillion companies that give solder training. Some are: * BEST Rolling Meadows, IL 847-797-9250 Bill Westmoreland (bwestmoreland@solder.net) http://www.solder.net/ * Circuit Technology 340 Raleigh St Holly Springs, NC 27540 (

Checklist

Electronics Forum | Wed Feb 26 21:38:08 EST 2003 | jonfox

1. First and foremost is paste alignment. If you start out of the gates with a bad paste/pad relationship, it will be nothing but problems down the line. AOI is not required, but dial in the alignment, QC if necessary, then introduce the boards to

Flux residue?

Electronics Forum | Wed Apr 30 19:55:21 EDT 2003 | Mike Konrad

In all likelihood, you may not be leaving flux on the board rather you may be leaving saponifier on the board. Improper rinsing is a leading cause of cleaning related board failures. The problem with some inline cleaning systems (especially old o

Component Plating/Oxidation problem

Electronics Forum | Thu Nov 13 17:18:11 EST 2003 | davef

First, don�t get distracted by �OA� and �NC� formulations. This is nomenclature. We want to discuss the issue of �activity�. J-STD-004 "Requirements for Soldering Fluxes" classifies fluxes by their chemical composition, activity level and halide c


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