RE: differential probes

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "jimmy hynes by way of Terry Fritz <teslalist-at-qwest-dot-net>" <chunkyboy86-at-yahoo-dot-com>

Hi Terrry,

--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 >
 > Hi Jimmy,
 >
 > Cool!
 >
 > R13 to R11  and R14 to R12 seems too "thin".
 >
 > R12 to the MOV seems to have a small place where the
 > traces are thin too.

I started out making everything thin, and just widened
them later. looks like i missed a few
 >
 > The ground pad of TVS11 does not seem to have a via
 > to the ground plane.
 >
 > The traces for LED31 and R31 seem thin.

I didn't think it would matter for that one. The whole
wide trace thing is for low inductance, not low
resistance right? I'll fix it, but I don't see why
fatter is better there.

 >
 > I don't think the ground for the MOV on R22 is
 > right.
 >
 > We may be able to just put the fuses between the PC
 > board and the actual
 > banana jack connectors on the plastic case.

OK. That makes the insulation alot easier. The fuses
took up so much room i had to get rid of my happy face
:-(.
 >
 > I am thinking about using F211-ND fuses from
 > digi-key.  They are non-stock
 > but they have 480 of them.  Pigtail fuses would
 > eliminate fuse holders but
 > the fuses could also go in insulated in-line fuse
 > holders too.  So
 > basically, I don't think we should worry with
 > putting the fuses on the
 > board.  They are probably better off somewhere
 > between the board and the jacks.
 >
 > Thanks a bunch for doing all this!!!    It should be
 > really cool!!

Thanks for designing it, and helping me with the
layout. I agree, it should be really cool!

 > Cheers,
 >
 >          Terry
 >


=====
Jimmy

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