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Quote:"The iron tone is easy to identify. There's a 3 bit word that even gives you digital indication."
Yeh, that's what I told him, the tricky bit was how to implement the volume change, and he was wanting to do it on a CZ6, and the only circuit known (at the time) was the hand-drawn CZ5 one, which may be an identical circuit, or totally different.
Part of the complexity of the CZ circuit is related to wet-salt beach operation, if you weren't wanting that feature, you may have a slightly better chance of setting it up. (but wet beach operation is in many people's opinion one of the machines best features....).
From what I've read NASA-Tom say about the calibration process, it's time-consuming because it's iterative, Adjust Pot A, then Pot B, then Pot A again, then B ,that sort of thing. You would also need some 'standard' targets: ferrite, for certain, but probably a wet-salt simulator?, as well as more mundane items. The 'nickel high-tone' models are another added complexity, though the feature is probably of no use to most people, being a US Park-hunting niche.Comment
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I found some info on a Fisher CZ-5 project which probably came from a Russian site.
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http://www.geotech1.com/forums/showt...B-for-exchange
http://www.geotech1.com/forums/showt...o-build-a-CZ-5
http://www.geotech1.com/forums/showt...138-CZ5-driverComment
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