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is solder paste good to use? does it make the sound worse or better from better connections?
Follow Ups:
Russ is right. However, paste is also used for silver soldering to lower the melting temperature for doing jewelry work.
Solder paste....flux.....is intended for plumbing work. Do not use it on electrical/electonics work. It is corrosive! Only use a rosin based flux for electronics work. For that matter, only used a rosin core solder for electronics work. Seldom is it necessary to need any additional flux. If the items to be soldered are dirty clean them first with sandpaper, wire brush, and/or alcohol. When unsoldering it is often helpful to apply fresh solder first.
Good luck,
Russ
Are you talking of solder paste? Or the flux paste Russ talks of?Solder paste is made by taking the alloy of interest, making very small (1 to 10 mils, for example) balls, and then mixing it into a slurry with the appropriate flux.
Fluxes are R (rosin, non activated), RMA (Rosin, mildly activated), and A (active, typically water based)
RMA and A typically contain zinc chloride as the activation agent..Sometimes a bromide, a flouride, and rarely an iodide compound may be used. They are all in the halide family. R is usually petroleum jelly (vaseline) combined whith white water rosin (tree sap).
All the halides, when subjected to heat, break down, producing hydrogen chloride (flouride, bromide, iodide). That is the corrosive agent that makes the flux work.
The melting temp of the alloy will be set by the alloy composition alone...The workability, flux activity will be set by the temperature range the flux is designed to operate at. For the newer plumbing alloy, non lead, the melt temp climbed, from the 183C of lead/tin, to the 221 C of tin silver.
Typically, solder wires of the type kester #44, use RMA flux as a compromise. Slightly corrosive after completion, but provides better joints for most who use it.
Some manufacturers produce no-clean flux pastes, designed to not corrode the metals even if the residue is not cleaned..This is what is commonly used for silk screening the solder paste on PC boards just prior to surface mount component placement.
As to sound??? I make no claims on that subject...unless the joints are so bad as to affect the circuit..
Cheers, John
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