You may be thinking of the New Jersey Islander (NJQRP)
<
http://www.njqrp.org/islanderpadcutter/index.html> that used a small
diamond hole saw.
Similar hole saws are available from Harbor Freight, but watch for half
price sales.
I just tried the 'brad point' wood working bits also from harbor freight
- low cost and good results.
The brad point bit does not walk the way the hole saw did. I can even
work without
clamping the board to the drill press.
As a bonus the brad point bits cut perfect holes in the thinest sheet metal.
John
WA8KNE
George Lawrence Storm wrote:
> A long time ago I once had a specialty bit which was used to create a
> "donut" pad on a copper clad board, it had a pilot/drill and two
> spurs which cut the pad.
>
> I forgot what it is called, can anyone identify it and where I can
> obtain them (preferably in a few sizes)?
>
> -----
>
> I also am looking for a prototyping board for a MLF-56 (QLN-56)
> package. I need a quick and dirty prototype and don't want to design
> and etch a board until I know more about the part.
>
> My problem is that it has the ground pad underneath and I have not
> been able to find an adaptor which has that feature, has anyone made
> any for their own use and who might want to sell an extra or two?
>
> Specifically I will be working with a Cypress CY8C24794 chip.
>
>
> Thanks,
>
> - George
>
> -----
>
> George Lawrence Storm
> Macintosh Applications Development
> Edmonds (Seattle), Washington
> E-mail: <keencoyote@...>
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> Be sure to visit the group home and check for new Links, Files, and
> Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> If Files or Photos are running short of space, post them here:
> http://groups.yahoo.com/group/Homebrew_PCBs_Archives/
>
>
>
> SPONSORED LINKS
> Electrical engineering degree online
> <http://groups.yahoo.com/gads?t=ms&k=Electrical+engineering+degree+online&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=j8BDcUZHaUFXRiTdGW1cNQ>
> Electrical engineering degree
> <http://groups.yahoo.com/gads?t=ms&k=Electrical+engineering+degree&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=1hRjimUH1bArkHkhwLHsKQ>
> Printed circuit board
> <http://groups.yahoo.com/gads?t=ms&k=Printed+circuit+board&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=w-9RSkp3c_F5z9sFsIUKCg>
>
> Electrical engineering
> <http://groups.yahoo.com/gads?t=ms&k=Electrical+engineering&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=kdeBl4DzkdrbwYZnXCp4qA>
> Electrical engineering course
> <http://groups.yahoo.com/gads?t=ms&k=Electrical+engineering+course&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=b2N2CgZCtQayHKIbuMnSbw>
> Electrical engineering graduate school
> <http://groups.yahoo.com/gads?t=ms&k=Electrical+engineering+graduate+school&w1=Electrical+engineering+degree+online&w2=Electrical+engineering+degree&w3=Printed+circuit+board&w4=Electrical+engineering&w5=Electrical+engineering+course&w6=Electrical+engineering+graduate+school&c=6&s=211&.sig=4vee4qVM4QxoRdI6upxwMg>
>
>
>
> ------------------------------------------------------------------------
> YAHOO! GROUPS LINKS
>
> ∗ Visit your group "Homebrew_PCBs
> <http://groups.yahoo.com/group/Homebrew_PCBs>" on the web.
>
> ∗ To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
> <mailto:Homebrew_PCBs-unsubscribe@yahoogroups.com?subject=Unsubscribe>
>
> ∗ Your use of Yahoo! Groups is subject to the Yahoo! Terms of
> Service <http://docs.yahoo.com/info/terms/>.
>
>
> ------------------------------------------------------------------------
>
[Non-text portions of this message have been removed]