On 9/30/2013 12:43 AM, DoN. Nichols wrote:
On 2013-09-29, woodchucker wrote:
On 9/29/2013 11:01 AM, axolotl wrote:
On 9/29/2013 9:33 AM, Rob H. wrote:
Oh yes -- and someone mentioned the possibility that it is for
testing moisture content in wood. I don't think that device shown it
would work that way, because there are no provisions for insulating the
two pins from the metal holder. And the black screws coming in from the
sides are to secure the points in the holder, not to connect wires.
(Brass screws would be more likely to be used for electrical
connections, and they would still require the insulation of both the
pins and the screws from the holder.

[ ... ]

You make some good points on this one, the photos were sent in by a
visitor of
the
site so I don't have it in my possession. I think it was marked as
being part of
a
moisture meter when he bought it but I'll pass along your reservations
and see
what he says.


I think the object in question predates high impact plastic; one would
remove the driver and attach connectors to the electrodes.

Here is a modern version:

http://www.gann.de/Zubeh%C3%B6r/ElektrodenHolzfeuchte/EinschlagElektrodeM20/tabid/131/language/en-US/Default.aspx

It shows one which could have the wires directly connected to
the pin holders -- but also the small image expands to show a log with
several pairs of pins standing in it, plus one pair still in the holder.

Kevin Gallimore

What makes you think that the holes for the pins were not insulated?
There were many methods of insulating that did not require plastic,
mica, some form of cardboard (but not really a cardboard) , nylon,
rubber, epoxy , wood...

Or Bakelite as something which predates epoxy and was commonly
used for insulation and structural members. Probably a sleeve and a
disc of the Bakelite would work in the holder.

Enjoy,
DoN.

EXACTLY.. then all you would need are alligator clips

--
Jeff