Re: coherers

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

Original poster: "Brian by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ka1bbg-at-webryders-dot-net>

Hi, well i saw someone ask about cutting fine wire for ingredients in a
coherer..they were shaved like a sample using a machine like a specimen
shaver only the blade was made of carbide and the wire was fed thru a
carbide block with many holes for the wire to pass thru. As for stainless
steel, 300 series ie. 302,304 show slight magnetic properties, 308, up to
316 should not be magnetic because of their composition. 400 series like
440c which many bearings are made from is magnetic, most of the 400 series
are magnetic but some types are still non rusting. Forging, tempering and
other mechanical work on the metal can raise or lower the magnetic
attraction. As for the dull file, chavings can have much more surface area
and can be packed much tighter. the explaination i was given.. cul brian f.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, August 07, 2002 7:18 PM
Subject: Re: coherers


> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "colin.heath4 by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>
> >
> > hi
> >     s/s is magnetic depending obviously on the amount of each ingredient
> > if you have a good quality knife for hunting and the such it will be
> > magnetic as it has a high carbon content to improve the hardness of the
> > material cheaper blades will not (generally speaking)
> > good stainless steel as in anticorrosion properties is not magnetic
>
> That's interesting.  My favorite Buck pen knife has SS blades, is hard
> enough to be difficult to sharpen, and is strongly magnetic.  I have
> another unbranded pen knife with SS blades (says SS on the base of the
> blade) which is even harder to sharpen and is non-magnetic. ??????
>
> Ed
>
>
>
>