Mark, Does IPC-610 also cover automotive products? N2TK, Tony -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Goldberg Sent: Sunday, March 25, 2018 6:20 PM To: Elecraft Mailing List <Elecraft@mailman.qth.net> Subject: Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?
For commercial products, there is IPC-610. That is 400+ pages of descriptions of how to determine acceptability of and build electronic assemblies. It has very clear explanations and lots of pictures and diagrams of right and wrong ways to do things. Unfortunately, you may have to pay to get a copy. There are also a whole series of more specific specification documents for certain operations, but IPC-610 will have most of what you need to know. At least, it is what I look at first. Section 7.3.5.9 allows trimming after soldering if the trimming does not damage the solder. For certain classes of products, a visual inspection at 10X is required. Reflowing after cutting is also acceptable instead of inspection. I believe there are special trimmers that minimize shock during the trimming process. I attempt to follow IPC-610, although my skills may not be fully up to the task. At least I know where I fall short. 73, Mark W7MLG On Sat, Mar 24, 2018 at 10:28 AM, Mark Petrovic <mspetro...@gmail.com> wrote: > While reading through my new K2 kit's control board assembly > instructions, I see that some builders prefer to trim the resistor and > capacitor leads before soldering. I'm intrigued by this, and wonder > if someone who uses this technique can share their experiences. Do you > the solder the component from the top of the board or bottom? How do > you keep the component in place during soldering? I am assuming the > value of this technique is in the resulting lower profile of the components on the backside of the board. > > Thank you. > > Mark > AE6RT > > -- > Mark > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > marklgoldb...@gmail.com > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tony....@verizon.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
