Electronics solder is either 60/40 or 63/37 tin-lead and rosin core, it does not need silver and silver actually raises the MP a bit. Silver solder is nice but requires a lot more heat and special fluxes for best results. Lead based solder will probably get very scarce in a few years with all the emphasis on getting rid of lead and requirements that all electronics gear sold to real people have no lead in it in the next 2-3yrs. Satellite people are alarmed because tin based lead free solder grows whiskers over a few yrs and some satellite failures have been attributed to this. Like tharold soldering before cutting was very nice when cables were galvanized. Most cables I use won't solder with electronics solder.
Steve