In my job as a college electronics technician I use 4mm
plugs regularly for making test leads for the students and
myself I like these plugs as they are very reasonably priced and
seem pretty relaiable.They can be a little tricky to solder as the plug
needs a fair bit of heating to get to soldering temperature. I plug them into
a row of 4mm holes drilled into some scrap mdf board to hold them steady
while I heat them. As wood is a good thermal insulator you don't lose much heat
by conduction away from your soldering iron.Don't forget to put the plastic body
of the plug onto the cable before soldering!
