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Some times ago I repaired simple C-scope and for needs of repairing pictured it circuit - it is like by idea on first whites and tesoro but diferent with technological solution. It would be interesting for members but I don`t know - may be it is against rules...
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If it is an original C-scope diagram, then you cannot legally post it here. However, if it is the result of some back-engineering (and drawn by yourself) then it is ok.Originally posted by Gervm View Post -
whites and tesoro are not matter. send XLT, DFX, Sovereign GT, newest ones... if you have these. do not spam here these oldie schematics of USSR era like BFO's. not interesting reading.
sincerelyComment
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I am not interestig for BFO myself but I like old IB shematic. And I think most people will not make XLT and Sovereign GT even you`ll give them full discription and rather parts. It`s cheaper to buy them. But projects like (for example) as printed in Electronique Et Loris 05 2003 they will build with enjoy. 4 transistors, several OPAMPs, one 4017, one 4053 and you`ll buld good metal detector with discrimination. And you`ll spend only several rainy evenings. And also I say if you do it perfecly your simple device (not described higher) will be able to find large oject deeper than any modern comercial detector (TR or IB no matter, though they almost the same). I won many bets... But if you are looking for very very little coins from non-ferrous metals you ought to by some modern brand detector. It will be very very difficult to make better. It will be cheaper to buy.Comment
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If about circuit of CS so I `we written it for needs of repairing by myself and didn`t see it in web. Principles are as in many other devices of this kind but technical solutions are another (I meen comparator, fase turners, oscilator ect.). To check myself I built mockup and it worked enough well.
I read written higher and suppose it won`t be good to post equal circuit here.Comment
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Is interesting to see what other doing, antique, old or new. Several good ideas are lost causes it and "rediscovered" many years "after".Comment
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Yes, old is often not worse than new but maden on new part base and gently modernized it has defined charm. It was in IB units with sound indication on ptinceple "hearing signal that was transmited". As for me I`m tired of sounds like "pip - bip - puk" that can hear on output of mdern detectors. Don`t judge me... It's only my private opinion.Comment
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For example, in the Heathkit you hear slow increasing of sound when target is big and depth... and increases more in the center or when you're immersed in the "field", the better instrument is the ear.Originally posted by Gervm View PostComment
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Yes, I`m saying exactly about it! In Whites classic`s they tried to solve this task by psevdo methods (look at loading of output of comparator). For joke I combined this registrator (from Wh Cl 1)whis simple static metal detector and it works. Sound incrises smoothly. Other people use for this purpose VCO and so but I don`t like this sort of registrators.Comment
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jajaaj guys, i have one old detector in this the sound is how silbat of train, is great! for me, bad too, the new sound modern, are not beauty, but monotono, only my fisher 2225x is cool, strong, clear sound, but i love' the old detectors operation
you see, one bfo whit 9.v. baterie, sound really very strong, and these not consume energy? how is this? but the old detector is very heavy, btw, they are my prefered jajaComment
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Try to compare circuit from Radio Televisia Electronica 6 1984 and US Patent 4.024.468 May 17, 1977. Do you see any differenses? Oh, I see two - language and names of authors. Incidentally, circuit is working enough stable. I made it some time ago (when found magazine). I did`t like only one - a lot of wires to switch.Comment
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The third difference - was inserted PCB.Comment
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I liked the oscilator of this sircuit it`s enough stable and can be used for designing TR or IB detectors.Comment
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