🚀 go-pugleaf

On Sep 25, 8:35 pm, Archimedes' Lever <OneBigLe...@InfiniteSeries.Org>
wrote:
> On Fri, 25 Sep 2009 16:02:55 -0700 (PDT), mickgeyver
>
> <eyezku...@yahoo.com> wrote:
> >I'm trying to make a 10x scope probe that is capable of dealing with
> >slightly higher voltage levels of about +/- 20v yet at a high
> >impedance ~20Meg. This link "http://picasaweb.google.com/
> >UncleAltheKiddiesPal/Probe?feat=directlink" has some photo's showing
> >the probe and board warpage. The board was made from double sided
> >0.020-inch stock etched with a PCB milling machine (perhaps part of
> >the problem). It is (obviously) hand assembled.  I would appreciate
> >any tips or techniques that I could use to keep this board from
> >turning into a potato chip during assembly.
>
> >Thank you.
>
> >al
>
>   Use 0.032" media.  Bake under a flat press upon receipt of the bare
> boards.
>
I'll try to find thicker stock. Like Joerg there is no expense money
available for this project so I gotta use whatever is available.
There is a connector on the other end that I'm using to leech power
from the scope so I have limitations here.
>
>   Hand assemble...  no wave solder, no IR oven.
Done that. Perhaps if I make a frame to clamp it flat during assembly.
>
>   Those are the only techniques that yield 100% positive results.
>
>   Any automated process will certainly have a poorer prime pass yield.
>
>   That is, unless the PCB maker was real good at stress relief during the
> making of the boards.
I'm the PCB maker all contained in house with a mill machine.