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
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