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Carbon Composition Resistors

A significant number of our accelerators use old style Allen Bradley 2W carbon resistors like these:

c49bf42fa082a060e0cceb7b2961599d-huge-160906-def-widerstand1.jpg

The accelerator supplier, IBA, can no longer supply them. They have an alternative but do not recommend mixing old and new due to different aging characteristics.

Does anyone know of a supplier of these resistors, generally in the meg ohm range? I would only be looking for small numbers to repair damaged strings like above.

Anecdotally there was a previous problem with this type of resistor where the manufacturing process was changed so that the internal end of the leads was cut to a chisel point which resulted in them exploding when a high voltage was applied.

Best regards

Roger

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0 Former Community Member over 7 years ago

I've asked around and unfortunately all our stocks of those Allen Bradley resistors were disposed of at least 7 years ago because we finally wound down our operational support capabilities for the 665 kV HV platform (we now have a 665 keV RFQ).

What a shame. If only this network had existed then we could have given away all that sort of thing to a good home. We know from experience that it is practically impossible to find similar characteristics/quality replacements these days. You might have to look at complete replacement of all your resistors in those chains.

We by stuff from Willow and PPM. Other suppliers are also out there! It would be great to hear their opinions.

http://www.willow.co.uk/

http://ppmpower.co.uk/

Cheers,

Dan
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0 Former Community Member over 7 years ago

I've asked around and unfortunately all our stocks of those Allen Bradley resistors were disposed of at least 7 years ago because we finally wound down our operational support capabilities for the 665 kV HV platform (we now have a 665 keV RFQ).

What a shame. If only this network had existed then we could have given away all that sort of thing to a good home. We know from experience that it is practically impossible to find similar characteristics/quality replacements these days. You might have to look at complete replacement of all your resistors in those chains.

We by stuff from Willow and PPM. Other suppliers are also out there! It would be great to hear their opinions.

http://www.willow.co.uk/

http://ppmpower.co.uk/

Cheers,

Dan
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Carbon Composition Resistors

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