@ Jeanna

Here is the BURN sample test you wanted me to do.

Did it smell like wood?

2654 = Sample of cotton held in a small alligator clip which was held in turn in my vice
2655 = Sample is alight, sorry I didn't get it in the whole frame, things went so fast.
2656 By the time I got the bell jar over it and took this photo it had burnt through, but I got enough sample gas to give a answer.

Smell test, yes a bit like wood burning but diferent.
The back of my tongue went funny, a bit dry like.

I managed to suck some burnt vapor into a syrenge to take a wiff at later on, its only burnt 100 year old cotton folks, nothing like the hippies were doing way back when at woodstock, I don't smoke or drink, hmmmm will I get wobbly eyes? ha ha

USB microscope sample after test
027 = The carbon remnant
028 =  Close up of remnant

jim

@ All

I have done a Cotton Comparison test between the old cotton and a newer cotton on a reel.

In photo 029, the top bit is a tiny amount of old cotton fiber, the middle single white line is the single cotton thread from the reel.

As you can see, the newer cotton is very similar in dimensions and texture, so I see no problems in using modern cotton in today's Stubblefield coils, except, is there a difference if one uses Polester Cotton as is in big Overlocker reels?

 
jim

Thanks Jim,
It is cotton for sure. I don't know about the funny taste and dryness, but burnt seracin smells like burnt hair so you would never mix them up. And it is certainly not hemp, of course.
Thanks for doing that.
The new one on the reel looks like mercerized cotton and the older UN-mercerized.

OK, no more excuses for me.
I keep saying that.
I don't know how I am going to attach the 3 spools into one long one for the coil replication.
And, I still only have a short al or fe wire and need to make them longer too.

Did Lasersaber ever say what he did?

jeanna

What Im particularly interested in is the specific core material. Being that old a college with a spectrometer or other means can give you the specific chemistry makeup. If it was manufactured by a company there may even be a history of it.
Did it appear like cotton between the lamination's? Did the farmer have any info on it?

Quote from: jeanna on May 13, 2010, 03:45:20 PM

OK, no more excuses for me.
I keep saying that.
I don't know how I am going to attach the 3 spools into one long one for the coil replication.
And, I still only have a short al or fe wire and need to make them longer too.

Did Lasersaber ever say what he did?

jeanna

Jeanna:

You could weld them together by melting the wire ends but, if it were me, I would just cut the ends of the wire on an angle, match them together and solder them.  There should be no real tensional stresses on these once wound and then you can splice the cotton sleeve ends together by sewing them with cotton thread.

The soldered joint might change the inductance by a teeny tiny small negligible fraction of an amount.  The purists will warn you about this but, if you want to see how little this will be, just take two 6" pieces of the wire and cut one of them in half.  Solder back together and test that against your other uncut 6" piece.  I would bet you won't be able to tell a difference.

Anyway, just a thought.  Jim and I were discussing this very thing the other day.

Bill

PS  Depending upon your wire gauge and the size of your soldering gun or iron, you may need to use a propane torch...even a small one would do it well.