Boy this brings back memories.
My father, Tink, was a house carpenter and was well qualified to be called Master Carpenter and not because of a Union card.
Tink would make his own bandsaw blades from roll stock. To use Tink's method you first need to assemble the tool kit.
1. Five fire bricks
2. A silver Dime, not the fake Dimes we use today.
3. A box of 20 Mule Team Borax
4. Coffee cup.
5. A blow torch. One of those things that look like the Liberty Bell with a rocket launcher on the top.
6. Some white gas for the blow torch.
Proceed as follows. Cut the band saw stock to length. Grind the two ends square to the axis and polish the sides back for a 1/4" or so. Put three fire bricks in a row on the floor. Put the bandsaw blade across the bricks so the two ends meet. Make sure you don't have it twisted. (Note: Tink was a China Service Marine and when things went South on him he could blister the paint on the walls.) Place the two fire brick you have left on top of the bandsaw blade to hold them down. Align the blade so it is straight and the two ends are touching, the space between the two bricks holding it down is where you are going to do the deed.
Cut the Dime into four pieces for small blades or two peices for large blades. Put a pinch or two of the 20 Mule Team in the coffee cup. Put a drop or two of water in there and sturr it around with your finger. You want a paste, not a liquid. Add water or borax to get it right.
Put some of the borax paste on the place where ther blades meet. Put the Dime over the crack between the blade ends.
Pump the heck out of the blow tourch to build pressure, dribble a little gas in the warming pan under the burner and light it off. When it gets hot enough, open the valve on the tourch and get the thing roaring. Adjust unitl you get a good blue flame and point that at the -Dime, Borax, bandsaw blade assembly and tell your son that if he bumps anything you are going to kick his XXX. Watch the dime, it will get red and then melt. If you did everything correctly the crack between the blade ends will fill with sliver. Remove the heat and wait for the blade to cool down. Grind both sides and the back edge of the blade smooth. Put it on your bandsaw and cut away.
Tink is gone but his lessons live on. For a while longer anyway.