[Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?

[Nr4c]

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-hawley at 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-hawley at illinois.edu
> 
> Amateur Radio, KE9UW
> aka Jack, BMW Motorcycles
> ________________________________________
> From: elecraft-bounces at mailman.qth.net [elecraft-bounces at mailman.qth.net] on behalf of JEROME SODUS [jsodus at comcast.net]
> Sent: Saturday, March 24, 2018 10:40 PM
> To: elecraft at 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 <k9yeq at live.com>
> To: "kstover at ac0h.net" <kstover at ac0h.net>, 'Mark Petrovic'
> <mspetrovic at gmail.com>, "Elecraft at mailman.qth.net"
> <Elecraft at mailman.qth.net>
> Subject: Re: [Elecraft] Resistor and capacitor installation
> techniques: trim before or after soldering?
> Message-ID:
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> 
> 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.
>