I love the smell of burning rosin in the morning, it smells like... Heathkit!
Those photos bring back memories... I built a shortwave radio, radio control set, multiple integrated amps, and possibly a few more. Also built a couple of Dynaco products--although I think those came with completed circuit boards...
If I tried really hard, I bet I could find the original construction manual for the tube amps my dad built...
Probably if you remember Heathkits, then you will remember going to the drugstore to test vacuum tubes...