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Solder - Tin/Silver or Tin/Lead/Silver?


 

Apologies if this has been answered but I couldn't find in a search:

I'm about to restore my first piece of Tek kit. understand the potential issue with the silver deposit ceramic strips and have electronic solder to hand that is 95% Tin, 3.8% Silver and 0.7% Copper.

This appears to exceed comfortably the desired silver content, but it will be higher melting point (227 degC) than lead-containing variants.

My question is "do I need to buy yet another reel of solder such as Sn62/Pb36/Ag2 which will be 179 degC melting point but lower silver or can I use what I already have?".

Another way of asking: provided solder is silver-containing how much does temperature vs. silver content matter?

Thnak you.

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