On 2022-03-14 15:35, Wayne Burdick wrote:
The following is only tangentially related, but it has to be dusted
off periodically:
https://www.qsotoday.com/n6kr-desolder-primer.html
Cute. If it's a board I care about - say the motherboard of my K2 - I
would proceed directly to step 8 ( clip the part ). Parts are cheap.
Boards are expensive.
Back in the 70's I labored as a tech in a telephone equipment factory of
a company that shall remain nameless ( Oh, all right, it was Northern
Telecom ).
Us techs troubleshot, but all rework was done by the rework girls.
Their station was in the middle of the test floor. These ladies
soldered and desoldered all day, and they were GOOD at it. It was
mostly DIP TTL chips, although there were some big LSI's. They always
started with step 8: Clip-clip-clip-clip-TOSS.
One of my fellow "techs" ( I use the term advisedly ) had a unique
technique for troubleshooting:
He would mark the first two rows of chips and have the ladies replace
them. If that didn't work, he
would mark the SECOND two rows of chips... etc.
Another ( much smarter ) guy was troubleshooting one of the boards in
the dog pile. A +5-to-ground short. No progress. He came in one
Saturday determined to conquer this thing no matter what. He found a
50A 5V supply and hooked it to the 5V and ground. With 50A flowing
through the board, he took a sensitive DVM and probed - one side on the
+5, other side ground. The spot with the lowest voltage was his short.
What was it? An EXTRA plated through hole. I gained great respect for
the conductive power
of those holes...
- Jerry KF6VB
I wrote this long ago. Hopefully it's still as dubiously relevant as
ever.
Wayne
N6KR
On 2022-03-13 22:06, Tony wrote:
All:
Can anyone recommend a budget de-soldering iron that can be used in
tight places? I need to remove a small component that has a few
surface mount devices close by so the iron would need to have a
small
tip.
Also need advice on the best soldering iron to use for this type of
work as well as the best low-temp Rosin core solder to use.
Thanks,
Tony -K2MO
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