[Elecraft] Random K2 building hints for those starting out
Bob - AG5Q
[email protected]
Fri Jun 6 00:17:00 2003
> Masking tape works better for me than bending leads to temporarily hold
> parts in place while soldering.
I don't feel comfortable using tape in contact with components because of the possibility of static electricity.
One crude test of your tape is to unroll it in a totally dark room. If you can see sparks, it's pretty charged up.
I just did an experiment with a roll of masking tape and a roll of plastic electrical tape.
I put the roll on my finger so it would turn easily and as I quickly unrolled several inches of tape, I could see a blue line where
the tape was separating from the roll. This discharge was visible for both rolls. I don't know how long the static charge persists,
but it's there at least for a while.
For the K2 assembly I bent the leads a little bit on a few components at a time and then soldered only one lead of each component in
the group and checked them.
If a component did slip while the board was upside down, I only had to reheat one lead to reseat it.
This is not a perfect solution by any means. There is a trade off between the risk of reheating a component vs. the risk of static
charge. I think static charge is especially insidious because you may be soldering resistors which are not likely to be affected,
but the tape might be in contact with a previously mounted FET or IC that is sensitive.
73/ Bob - AG5Q