PC backing boards

[Aurora]

Some over two years ago I started an ODS build... for several reasons it went into a halt before last summer, but now it's time to get going again...
I made the larger boards mysellf, with eyelets, and bought a set of the smaller bords from a vendor here.. these were delivered with blank backing boards... Given that even regular PCBs can be quite uneven on the underside - how do you mount these?? Spacers between the two boards, or just screwed together??

[erwin_ve]

Some over two years ago I started an ODS build... for several reasons it went into a halt before last summer, but now it's time to get going again...
I made the larger boards mysellf, with eyelets, and bought a set of the smaller bords from a vendor here.. these were delivered with blank backing boards... Given that even regular PCBs can be quite uneven on the underside - how do you mount these?? Spacers between the two boards, or just screwed together??

Hi,

Backing board has a spacer ideally to prevent stress on traces. I use a nut as spacer.

Erwin

[martin manning]

A nylon washer at each mounting bolt is another option, and lets the bolt freely clamp the whole sandwich.

[Aurora]

I thought so... just had to ask...