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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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Posted to rec.antiques.radio+phono,sci.electronics.repair
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circuit board material of the 1960s
Alan Douglas wrote in message
... Probably vulcanized fibre, made of cellulose treated with sulfuric acid, commonly used for such things as wastebaskets and cheerleaders megaphones. Fishpaper is also vulcanized fibre but thinner, used for electrical insulation and is still available. Vulcanized fibre is very tough, unlike paper-base phenolic which was usually used for circuit boards. Alan So if its vulcanised fibre board and I burnt a sample of it would it have a rubber smell ? If it was a paxolin type material then the phenolic smell if burnt would be a pretty sure indicator |
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