Re: Bummer!

John Larkin wrote:
On Sun, 3 May 2009 17:32:18 -0700 (PDT), Greegor <Greegor47@xxxxxxxxx>
wrote:

On May 3, 7:23 pm, John Larkin
<jjlar...@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
These crappy RatShack terminal posts are actually conductive!
http://www.radioshack.com/product/index.jsp?productId=2103639

A pair of them leak 12 pA to the chassis at +1 volt. If I ground
myself and hold the plastic screw part of one, it goes up to 20.

So I'll have to replace them with some Pomonas or something. What a
nuisance.

Pity; they do look nice.

John
0.000000012 Amp? LOL

I just finished machining a couple of big slots in the aluminum box,
where the critical binding posts go, and added a polycarb plate that
the terminal strips mount on. Now the leakage is showing about 100 fA,
basically my measurement limit. It was ugly, machining the
already-"finished" electronics. I tried milling it dry, but that
didn't work, so I wound up getting chips and cutting fluid everywhere.
Had to clean all that up.

It's amazing what a few drops of Tapmatic will do.

Here's the box:

ftp://jjlarkin.lmi.net/99A260A1.JPG

What's with the huge bolts sticking out of the front? It'd look a lot nicer if you'd put the heads on the outside.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
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