Soldering – Part 6

 There’s two things you need to be good at soldering, practice and a good soldering iron. If you don’t already have a good iron, check out my review of the Weller WES51 Analog Soldering Station for links to the iron and some good soldering supplies.

For this example, we’re going to be soldering some 3.5mm bullet connectors on these old motors a have laying around. The motors in my parts list (NTM Prop Drive Series 28-30S 900kv) will come with 3.5mm bullet connectors already soldered on them, but I would check the connections to make sure they’re not going to fall off.


To start off, heat your soldering iron to about 550 degrees fahrenheit. Then hold the tip of the iron on the outside of the bullet connector (works best if the tip is on the little hole on the connector) while placing the solder into the top of the connector.


Now place the wire into the top while still holding the iron to the side of the connector. Hold the iron there for a few seconds so that the solder has time to coat the wire, then release the iron from the connector while keeping the wire steady until the solder is solid and no longer shiny.


Now cut a piece of heat shrink tubing making sure it’s long enough to go over and past the connector by about 1/4 of an inch


After that, heat the connector and tubing with a heat gun or a lighter.