[sdiy] serge spinal column - alu pcb mounting materials inquiry

[Steve Ridley]

> I remember reading or being told these where choosen because they were
> cheap and came from refrigerators or some other scrap utility source and
> i've noticed in some of my early '73 panels that the original assembler
> didn't even bother to cut the material, but rather bent or sheared it
> to some approximate length.

I don't think the shape is critical.  Just needs to be strong enough to
support the boards and have a slot for the boards to sit in.  Certainly 
it doesn't appear to have been made for mounting circuit boards.  Early 
Serge seem to have used a lot of surplus parts.  

Although it looks like (and is) a really cheap and nasty way of mounting
the boards, it seems to work reasonably well.  I wonder if the whole frame
flexes a bit and protects the boards from the shock of rough handling.

The most recent ones I've seen still use a very similar construction
system.


Steve