Soldering a copper tab on a speaker ring

Objective

Heat copper tab until the solder reflows.

End Product

audio speaker

Equipment

Ambrell 1.2 kW, 150-400 kHz solid state induction heating system equipped with a remote heat station containing one 1.2 µF capacitor and a specially-designed work coil.

A multi-turn helical coil about 3/16 inch internal diameter made out of 1/16 inch diameter tubing.

Materials

Copper tab 0.25 X 0.25 inch square about 0.05 inches thick. Lead free solder material (higher melting temperature than regular solder.)

Temperature

500*F (260*C)

Frequency

286 kHz

Testing

Solder wire is fed onto speaker tab area using an automatic wire feeder. It is then heated to re-flow the solder

Benefits

With an efficient coil design induction heating easily reaches the desired reflow temperature in a very short amount of time. 

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