And trimming before soldering allows the exposed copper “end” of the lead to be coated with solder thus eliminating corrosion to the bare copper.
Sent from my iPhone ...nr4c. bill > On Mar 25, 2018, at 2:05 PM, hawley, charles j jr <c-haw...@illinois.edu> > wrote: > > That's probably good advice from NASA. However in 50 years, I've never > cracked a solder joint by trimming off the excess lead after soldering. I can > see how it could be imagined to happen and safer for sure if you are not > going to be able to fix it should it ever happen. > > Chuck Hawley > c-haw...@illinois.edu > > Amateur Radio, KE9UW > aka Jack, BMW Motorcycles > ________________________________________ > From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on > behalf of JEROME SODUS [jso...@comcast.net] > Sent: Saturday, March 24, 2018 10:40 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Resistor and capacitor installation techniques: trim > before or after soldering? > > About Message#15 copied below.... > > Sorry but cutting wires after soldering is "bad practice"; NASA wanted the > soldered connection left undisturbed. > > If I ever saw an assembler or tech doing that "bad practice", they'd get a > verbal warning that first time and a written warning if it ever happened > again; but I had good, conscientious people and never had to do that. > > So, tin the wires if needed; position the part and then trim wires before > doing the final soldering. > > 73 Jerry KM3K > > > > Message: 15 > Date: Sat, 24 Mar 2018 19:39:47 +0000 > From: Bill Johnson <k9...@live.com> > To: "ksto...@ac0h.net" <ksto...@ac0h.net>, 'Mark Petrovic' > <mspetro...@gmail.com>, "Elecraft@mailman.qth.net" > <Elecraft@mailman.qth.net> > Subject: Re: [Elecraft] Resistor and capacitor installation > techniques: trim before or after soldering? > Message-ID: > <ro1p152mb09079615622cf62bbae2b4949c...@ro1p152mb0907.lamp152.prod.outlook.com> > > Content-Type: text/plain; charset="us-ascii" > > Follow the instructions and solder as directed. There are components on both > sides as I recall with the majority on the top. The leads need be spread to > hold the components in place on the board. Once done soldering use a flush > cut wirecutter to remove the excess. Not a good idea to trim them before > soldering. > ______________________________________________________________ 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
