Just got to thinking, the EU and other countries have gone to lead free solder. Here in US, it is still permitted, although in manufacturing there is less and less. Hence, am less familiar with the newer tin solder with silver alloys. When one said silver solder, usually referred to non-electronics work, and those rods were getting into brazing temperatures.

I've been soldering for the past 48 years, started with point-to-point tube (valve) circuits, then discrete component and low scale integrated circuits. Never had a problem with 60/40 and similar standard tin/lead solder. Still have plenty of it, so for radio and electronics repairs suit me fine.

Haven't used any of the lead free (electronic assembly) solders yet. Times have changed with the green movement. Loved using the Weller temperature control stations with my employer 30 years ago. At home, still using my Graymark 40 Watt soldering iron from high school, albeit changed out the power cord 30 years ago. Never invested in a sophisticated soldering station for home use, the old 40 Watt and newer Radio Shack 30 Watt were hot enough. Then, put together a Charlie's R/C Cannon 810 4 channel mini R/C system kit. Only thing assembled was the transmitter section circuit on the PC board. At least in US, as long as one (unlicensed that is) doesn't dink with the RF (radio frequency) section, should be OK.

Gone are the 40 Watt $1.50 Graymark soldering irons of the late 1960's. (Still got one with screw on wooden handle albeit with a new cord replaced 30 years ago.) Did some work recently on an FM broadcast receiver kit that included a few surface mount components like an IC and several resistors. That was a challenge to not bridge solder joints with such tight spacing. With a schematic written in Chinese, was a challenge to decipher.

As in all things, if one doesn't have the knack for working with electrical circuits, best let someone else do it.