For information purposes: Brazing/silver soldering is a pretty complex subject. The average liquidus for brazing spelters is in the order of 815 degrees C. The temperature will vary considerably depending upon the constituents of the alloy which in turn will be depend on what it is required to do.
For frame brazing a pretty fluid alloy would be required which would fully penetrate the joints. It is even possible that a form of silver solder might have been used as this range of alloys tend to be more fluid than the spelters and will fully fluid at temperatures as low as 620 degrees C. and up to brazing temperatures.
Congrats to your wife on the forthcoming sprog, (well you didn’t really think you deserve much of the credit do you!), another triumph of optimism over experience! But then you are a Scott owner!!! Better get she/he a Rumi – 2-stroke, 2 cylinders, air cooled I’ll admit but quirky at least and makes a pretty good noise too!
