开云体育

The Radio Shack desoldering iron was very functional with a bit of modification.? I used a doorbell transformer,?full wave bridge, windshield washer pump, Gerber baby food jar with two brass inserts in the lid (as a collector in front of?the pump ), and high temperature vacuum tubing with a footswitch to replace the rubber bulb. ?
I repaired hundreds of Tektronix, HP and Heathkit ( the factory was an hour away from me ) instruments as a high school student?building my lab and reselling instruments to trade up. ? ? The procedure was to apply the tip to the junction, let it melt to down to the board,?slide the tip so it was touching the component lead, wait a small amount of time, press the foot switch and move on.? For some brittle connectionsadd a touch of fresh solder before desoldering to avoid lifting pads.
Having a working vacuum source made it act like a completely different tool.
For anyone who buys a shiny new desoldering tool, find a junk board to practice on it before working on something you care about.
Jim On ?Thursday?, ?July? ?26?, ?2018? ?07?:?02?:?12? ?PM? ?EDT, Michael A. Terrell <mike.terrell@...> wrote:

I repaired hundreds of Commodore 64 computers with one, along with a lot of test equipment and computer motherboards. You can do bad work with any desoldering tool. You need to practice on scrap PC boards, if you aren't familiar with the process. Also, keep in mind that the solder used for wave soldering has a higher melting temperature than that used for hand soldering. If you don't get it all out on the first try, refill the through hole with 63/37 solder and try again. Also, wait until the solder has melted all the way through the board. It helps to be able to see the other side of the board. In some cases, there is a heavy trace or copper pour on the other side so you need to use a different method. The end of the tip needs to be kept clean, and do not suck any flux into the hollow tip. It will dissolve some of the metal each time you do.


Michael A. Terrell