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

[Mel Farrer]

I do also carefully reflow......  Don't what any popping loose.  Usually with a finger on the part.  Wrist strap on of course.....
Mel, K6KBE

      From: Bill Johnson <k9yeq at live.com>
 To: 
Cc: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
 Sent: Sunday, March 25, 2018 2:31 PM
 Subject: Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?
   
I populate, solder, cut, re-solder.  

72 & 73,
Bill
K9YEQ
FT’er for K2, KX1, KX3, KXPA100,  KAT500, W2, etc. 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net <elecraft-bounces at mailman.qth.net> On Behalf Of Nr4c
Sent: Sunday, March 25, 2018 4:08 PM
To: hawley, charles j jr <c-hawley at illinois.edu>
Cc: elecraft at mailman.qth.net; JEROME SODUS <jsodus at comcast.net>
Subject: Re: [Elecraft] Resistor and capacitor installation techniques: trim before or after soldering?

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:
> <RO1P152MB09079615622CF62BBAE2B4949CAF0 at RO1P152MB0907.LAMP152.PROD.OUT
> LOOK.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.
> 

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