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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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Repair of 2 USA "Compass" metal detectors of 1976 and 1978
Is there a frequented metal-detecting usenet group?
I've been asked to repair 2 old detectors The 1976 "Yukon 77B" I've repaired but if anyone knows more about the 2 National Semiconductor 8 pin DIL custom? chips marked 274 0-004 and 624 0-001 I would be interested. The 1978 "Coin Magnum" seems to be vaguely working in the opposite sense to how i'd expect , does anyone one have normal operation guide or any technical details before I delve in deeper , at least it uses industry standard chippery. Anyone know what the central lump covered in vacuum moulded cover is hiding? -- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on http://home.graffiti.net/diverse:graffiti.net/ |
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