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Originally posted by Ivconic
This is also interesting. Usually (if only one of the coils is shielded) it is the RX, not the TX. That's one area for improvement.
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This is also interesting. Usually (if only one of the coils is shielded) it is the RX, not the TX. That's one area for improvement.
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Yes. Adding shield on RX will improve it a bit.
Funny....MD3007 coil also had only TX shielded.
BTW...which brand are 4003 and 3007? What is Micronta? It says "....Radioshack...." on back label. What is Radioshack? Importer? Trader?
I have heard many times that name, but never cleared up its origin...
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MICRONTA MODS
RADIO SHACK-MICRONTA-AND THE DISCOVERY BRAND BY MICRONTA, AND BOUNTY HUNTER WERE AT ONE TIME ALL RELATED !!! THAT FUNNY LOOP-STICK IS STRANGE. BUT I JUST REMEMEMBERED WHAT WAS THAT STUPID LITTLE STICK THAT WAS ON TOP OF THE BOUTY HUNTER-TIME RANGER A FEW YEARS BACK ??????? ANYWAY I POSTED THIS THREAD TO HELP SOMEONE ELSE. AND ALSO THAT THE "4003" HAS A LOT OF BUTTONS , SETTINGS "BELLS AND WHISTLES" SO I THOUGHT IF YOU JUST ADDED SOME POWER , WOW, YOU WOULD REALLY HAVE A DETECTOR !!! I WISH SOMEONE WHO COLLECT'S OLD TREASURE MAGAZINES WOULD LOOK FOR THE '4003' MODS FROM SOMEWHERE AROUND 1990 TO 1993 . SOMETIMES BIG PUBLIC LIBRARIES HAVE ALL THE MAGAZINES LIKE THE OLD "POPULAR ELECTRONICS" , "ELECTRONICS NOW" AND "POPTRONICS" BUT I AM NOT SURE ABOUT ALL THE TREASURE MAGAZINES THEY HAD BACK IN THE EARLY 1990'S. I WILL KEEP SEARCHING ALSO...............EUGENEComment
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Thanks Eugene!
Although i saw much better detectors in my life, still have some "nostalgy" upon old non motion detectors.I will never forget Cscope1220b and all the joy working with it.Pitty i sold it, at the time i didnt realized that kind of machine should be kept for good in collection.
Micronta with all "bells and whistles" have some "schmeck" from old times. That's why i do intend to keep it in very good shape and ocassionaly go outdoor with it. If you find some extra informations, please post here,anytime.
Regards!
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MICRONTA MODS
WHAT I DO NOT UNDERSTAND IS WHY SOME METAL DETECTORS ARE PUT ON THE MARKET "FOR SALE" AND THEY WORK GREAT !!!! BUT THEN THEY JUST DISSAPPEAR !!!!! AND THEY DO NOT MAKE THAT MODEL ANYMORE . I WILL TRY TO FIND SOME PHOTOS OF DETECTORS THAT I KNOW WERE GOOD . I CAN START A NEW THREAD OR KEEP IT HERE ,BUT IT SHOULD BE CALLED " GOOD METAL DETECTORS THAT HAVE DISSAPPEARED" . SOME ARE WHITES , SOME ARE DISCOVERY AND MICRONTA. THEN IF SOMEBODY SEE'S A UNIT THEY HAVE IN THEIR CLOSET THEY CAN TAKE THE COVER OFF AND POST A HIGH RESOLUTION PHOTO OF THE PCB "CIRCUIT BOARD". AND IF SOME OF THESE MODELS CAN BE MODIFIED THAT WILL BE GREAT. YEARS AGO I OWNED A WHITES "LIBERTY DI" . THAT MACHINE WORKED SO GOOD , I WISH I WOULD OF KEPT IT. IT HAD A METER FOR I.D. AND THE CIRCUIT BOARD AND CASE WAS NOT TO BIG. AND BACK THEN I WAS NOT TAKING EVERYTHING APART LIKE I DO TODAY. SO WHITES LIBERTY 2 , OR 3 OR LIBERTY DI WILL BE ON THE LIST OF DISSAPPEARED DETECTORS. SO PEOPLE HERE WILL SAY THAT MODEL HAS BEEN DISCONTINUED FOR SOMETHING BETTER !! FALSE !!!!!!!! NOT ALWAYS TRUE. LOOK AT COMPASS METAL DETECTOR'S OUT OF OREGON STATE. WHAT HAPPENED ??? AND WHAT HAPPENED TO THE "COBRA II" A 12 KHZ DETECTOR ???? SO WHEN I GET TIME LATER I WILL POST SOME PHOTO'S . OR ANYBODY ELSE IS WELCOME TO POST PHOTO'S OF THE "LONG LOST DETECTOR'S"TAKE CARE ALL , EUGENEComment
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Very good idea! Go ahead!
I can name only two "evergreen" machines, i would never forget; Cscope1220B and Minelab Relic Hawk.
Carl could write his part here, on this subject. His huge collection is very interesting.On photo i can see few very old and very interesting detectors.Would like to know more details on those. But....let's not push man to that if he dont have time right now.
So you better start new thread and post few things.I will contribute with few of my photos and opinions..
Regards!
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BTW i fixed Micronta coil and backed up it in original condition.It is working as expected. Not so bad...but also not so good. It could be used...but it is real vintage, better to keep it on the wall...
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MICRONTA MODS
I JUST POSTED THIS ON THE HOBI-DETEKTOR SITE , SO HERE ARE THE MODS FOR THE MICRONTA-4003 FROM A RUSSIAN FORUM. CHANGE R-33 TO 2.2 K OHM . CHANGE R-29 TO 10 OHMS AND SOLDER A 2.2 MEG. OHM RESISTOR ACROSS PINS 1 & 2 OF IC-1 WHICH IS THE 4007 CHIP..................EUGENEComment
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MICRONTA MODS
WOW, LOOK WHAT I FOUND !!!!!!!! ANOTHER WAY TO MOD THE MICRONTA-4003'S !!!!!!!!! COMPARE THE 2 IMAGES AND TELL ME IF I REALLY NEED GLASSES
. THE SHADOW-300 PROJECT FROM 1980 ?? RADIO-SHACK CAN OWN WIMBOURNE PUBLISHING !!! WHICH CAME FIRST THE CHICKEN OR THE EGG ?? ..................ANYWAY IT LOOKS IDENTICAL TO ME , WHO COPIED WHO ?? ..........EUGENE
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MICRONTA MODS
HERE IS THE PDF PROJECT FILE OF THE ALTEK QUAD. THIS HAS POTENTIAL , WHICH MEAN'S THE MICRONTA-4003 HAS GREAT POTENTIAL ALSO !!! YOU CAN BUY THEM FOR $20. DOLLAR'S OR LESS , MAKE THE MODS , IMPROOVE THE SEARCH COIL , AND YOU HAVE A DECENT DETECTOR !! .....EUGENEComment
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Hi Eugene.
I constructed it before ...25years. It was a medium.... to good detector.
But why anyone to construct it and not the modidied TGS??? It is smaller and more more sensitive.
It is my opinion..
Regards
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These are the same mods that I already posted in Post #2 of this thread.Originally posted by amtech2005 View PostComment
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MICRONTA MODS
QIAOZHI , YES I SEE THE ZIP FILE NOW, SO I WILL NOT TAKE THE CREDIT , BUT I AM GLAD WE FOUND THE MODIFICATION. ALSO THE 9014 OR 9015 ARE VERY LOW SIGNAL TRANSISTORS ,THEY MIGHT ALSO BE CHANGED. AND MOST OF ALL THAT SHADOW 300 PROJECT SCHEMATIC IS REALLY SOMETHING !!!! WHO COPIED WHO ?? TAKE CARE........EUGENEComment
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Yes - that's a very interesting finding. I already have both these schematics, but have never noticed the similarity.Originally posted by amtech2005 View Post
By the way amtech - is the CAPS LOCK key stuck down on your keyboard? Did you know that typing with all capital letters is equivalent to SHOUTING?Comment
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