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Old 7th March 2013, 05:29 PM   #111
TheGimp is offline TheGimp  United States
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We had some stripper in the navy that would remove epoxy and any thing else it touched. It was a yellow/green slimy compound.
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Old 7th March 2013, 05:39 PM   #112
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Quote:
Originally Posted by popilin View Post
Because through the pores, you lose insulation, moist air has a breakdown voltage of about 900 V.

Glass ε > 4 , uralane has a dielectric constant similar to Teflon, so the mix isn't a good deal.

Tell me, please, I will use a mask.
Yes moist air is a problem but it will be a problem with any material and increases as ε approaches 1.
Why does the glass and thinner have to matched dielectric constants?

I still have some of the stripper but not sure if the bottles are still labelled with pn and mfgr (20 years old). I can check tonight and that will give me a full day to think about giving you hazardous material info (someone needs to look out for you).

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Old 7th March 2013, 07:59 PM   #113
popilin is offline popilin  Argentina
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Quote:
Originally Posted by TheGimp View Post
We had some stripper in the navy that would remove epoxy and any thing else it touched. It was a yellow/green slimy compound.
Tell me its name, please.

Quote:
Originally Posted by magnoman View Post
Yes moist air is a problem but it will be a problem with any material and increases as ε approaches 1.
Not if you do the windings as I do, look at post#59.

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Originally Posted by TheGimp View Post
Why does the glass and thinner have to matched dielectric constants?
The electric field "see" different dielectric constants, then there is no a homogeneous field, then capacitance will be not homogeneous.

Quote:
Originally Posted by TheGimp View Post
I still have some of the stripper but not sure if the bottles are still labelled with pn and mfgr (20 years old). I can check tonight and that will give me a full day to think about giving you hazardous material info (someone needs to look out for you).

Thanks
-Antonio
Well, if classified information is fine, if you can pass me by PM.
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Old 7th March 2013, 08:33 PM   #114
TheGimp is offline TheGimp  United States
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I don't remember the name, but it contained DMEK and MEK if IIRC.
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Old 8th March 2013, 01:33 AM   #115
TheGimp is offline TheGimp  United States
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Most of the rail is cut. I need to remove the rivets from another section to finish the rest of the peices.
Attached Images
File Type: jpg CoilWinderChassis.JPG (292.6 KB, 193 views)
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Old 8th March 2013, 02:46 AM   #116
popilin is offline popilin  Argentina
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Already taking shape, I like it.

I have the impression that you plan to do a lot of transformers.
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Old 8th March 2013, 03:01 AM   #117
TheGimp is offline TheGimp  United States
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If I can find a source for EI cores. bobbins and end bells I will do some experimenting. Yes.

If it works out I plan on replacing the AC motor with a stepper motor and adding a second stepper with a lead-screw for wire feed traverse.
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Old 8th March 2013, 03:55 AM   #118
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I have been planning on winding my own transformers also and will be following this thread with great interest. Here is a source for bobbins, channels, and end bells.

Transformer Components

I haven't been able to find a source for small quantities of laminations. I was thinking of trying C-cores.

Magnetic Cores - In Stock
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Old 8th March 2013, 12:16 PM   #119
TheGimp is offline TheGimp  United States
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I looked at using C cores till I checked the price of the banding tool and bands. Kind of pricy.

I wonder if Zip Ties could be used for assembly?

Last edited by TheGimp; 8th March 2013 at 12:38 PM.
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Old 8th March 2013, 12:37 PM   #120
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I looked at using C cores till I checked the price of the banding tool and bands. Kind of pricy.
I don't know what is so pricy....
Did you look here?

http://www.arzner.de/website/admin/c...preisliste.pdf
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