broken 100w resistor - can i use it?

[jobbig]

Hi, i am new here so im not sure if I post this right, I also want to apologize for my bad english.

So, long story short, im building a tesla coil and one of the components is a "terry filter" in this filter on of the parts needed is a big resistor. I have a 100w 1kohm resistor made for high voltage but today i dropped the package the resistor was in and it broke in half, but the wire is still intact and holds the 2 pieces togheter. so i carefully put it back togheter to make sure that the wire was still intact and then but a tape around it to keep it together. Now, my question is; will it work or is it just to throw away? I run out of battery in my multimeter so i cant test it and see the resistance but if it show the right resistance is it gonna be safe to use?

its one of those: http://danotherm.com/files/product_pictures/wirewound/TRVE-small.jpg

Thanks in advance and again, sorry for my bad english

 

[hevans1944]

Welcome to Electronics Point!

If you work quickly, you should be able to use super-glue (cyanoacrylate based adhesive) to mate and bond the two pieces together. Apply to both surfaces. Try for an alignment that mates the two pieces seamlessly. Clamp firmly and let dry overnight. Success of this procedure depends on the two ceramic faces being in the same condition as they were when first broken, and mating exactly the same way after super-glue is applied. Good luck!

 

[jobbig]

I mated upp the two pieces correctly when puting the tape on but i dont want to take the tape of again becuse im scared that i might ruin the wire...

 

[shadowfax49]

Hi all, this is my first post here although I've been lurking for a while....
A 100W wire-wound resistor is designed to run hot - in excess of 300 deg C if it's a vitreous coated type, so if you're dissipating anything like its rated power, super-glue isn't going to survive those temperatures, also, if the enamel has flaked away exposing even a millimetre or two of wire, that's going to create a "hot spot" i.e. a likely fuse point.
As Hevans said - good luck....

 

[bigone5500]

maybe you can rough up the surfaces and use some JB Weld. It is rated for 500F. If you have already used the CA adhesive, then leave it. You can put a coat of JB around the fracture. You can then apply heat, ~150F, for a while to speed up curing.

JB Weld is an epoxy adhesive. I have used it successfully in small engine block repair where a large crack was formed and the repair did not leak. Strong stuff!

 

[hevans1944]

I mated upp the two pieces correctly when puting the tape on but i dont want to take the tape of again becuse im scared that i might ruin the wire...

Well, I guess you will just have to hope the glue on the tape will hold after the resistor gets hot. If the tape fails, try @bigone5500 suggestion to glop some JB Weld around the resistor. I can testify this epoxy is really good stuff.

 

[cjdelphi]

I'm wondering if heatsink plaster would do it, once it sets it bonds well and handles high temperature