Originally Posted by
pacificaslim
Doesn't exist? I'm confused: Are you saying Teesdale puts it on his website but has never built one and has no intention of building one? I really doubt that. He also must see the differences in geometry to be significant enough to distinguish it by name from his other frames.
Don't be confused.
Steel can be brazed (with internal or external lugs, and some have even done lugless), and it can be welded, using a number of techniques... steel isn't fussy, however, different types of tubing (steel alloys) are specifically designed for different welding techniques.
However, aluminum needs to be stripped of it's oxydized layer where to be joined, and then protected against oxygen during the welding itself, by methods, such as, for example, an inert gas shielding (MIG and TIG are popular methods) or flux shielding.
That was a bit off topic though... however, it's not the first time we've strayed now is it? ;-)