1. 1 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Chelmsford Amateur Radio Society Intermediate Course (10) Soldering

2. 2 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Soldering The accepted definition of soldering is the joining of metals using a filler material of a lower melting point than that of the parent metals to be joined.

3. 3 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Soldering Procedure The secret of a good solder joint is clean, clean and clean again. A solder joint is produced by:- 1 First thoroughly cleaning both surfaces to be joined. 2 Tin both surfaces. 3 Mechanical fix the components together. 4 Then apply heat to the joint and bring the solder to the joint.

4. 4 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Solders Solder is an amalgam of Tin and Lead. The percentage of each of these materials defines the use for the solder %Tin %LeadUse 60 40Good for all electrical and mechanical work 45 55Very liquid used in plumbing 50 32Low melt solder for white-metal casings Plumbers solder is not suitable for electrical work

5. 5 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Solder Types Solder comes in many forms i.e.:- A solder stick with separate flux, Solder Pastes good for joints outside, easy to use. Multi-core solder is the usual form for electrical work.

6. 6 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Multicore Solder Flux Tin/Lead

7. 7 Chelmsford Amateur Radio Society Intermediate Licence Course Carl Thomson G3PEM Slide Set 12 (10) Soldering Solder Joints BAD JOINT TOO MUCH SOLDER BAD JOINT TOO LITTLE SOLDER TAG DIRT WIRE SOLDER TAG GOOD JOINT OUTLINE OF WIRE SHOWING THROUGH SOLDER