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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Fusible resistors queries
When did they first arrive and do they always have an unusual body colour?
There is a patent reference to 1977 but when would the first appearance in domestic equipment have been ?. Resistors that fail open circuit if a designed-in current capacity weak point is exceeded , fuse-fashion, not just the thermal limit of the body , so often no overheating discolouration to the body or surrounding board |
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