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I bought a White's DFX for parts, but I thought I might try repairing it to learn a few things before it meets its fate. The previous owner got it a little too close to the Gulf Of Mexico, and it has obvious signs of some saltwater intrusion. I thought I could easily remove the corroded 5-Pin connector and solder on a new one, but it seems not that easy. The connector end of the coil cable took on saltwater, which wicked into both the spiral shield and the center conductor of both coaxial cables. The corrosion on the wires is preventing me from making reliable solder joints. I've cut back around 8 inches and it's just more of the same. What is the general wisdom with re-cabling a coil? Is the original style dual coaxial cable available somewhere, or is it just as well to use microphone cable, which uses one shield surrounding both conductors?
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you may find the type printed on the cable izolation above.
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I assume a 950 coil. There were two styles, the old style is foam injected and very difficult to get open. The new style is much easier. The cable was custom made but perhaps an S-video cable might work. Another option is to find a broken DFX coil that has a good cable. Personally, I would start by finding a good coil to see if the detector itself works before going to the trouble of fixing the coil.Comment
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Thanks for the input guys! The jacket just says "White's Electronics", and I have not yet cut back enough to see if the individual coax cables have any writing on them - that's a good idea, and I'll tackle that later.
Carl, luckily this one must be the later type as the coil support is a piece of moulded styrene. Is the glue some sort of hot glue, or is it a solvent or curing type? I believe you're right, and I should see if I can make the detector come to life before I get too excited about fixing the coil. I didn't realize S-video cable is dual-coax - that'll be my first choice when I attempt to replace the cable!Comment
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coaxial? can you give pics?Comment
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You won't find any writing on the cable, it was custom-made to White's spec by National Wire & Cable. Yes, that's the newer coil and easy to repair. The seams were glued with a plastic/MEK mixture; use a MEK-proof syringe to re-seal.
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Carl, thanks for the info on the case adhesive. I had guessed it was acetone & plastic, but MEK & plastic makes more sense. Is the adhesive on the inside hot glue or some other type?
kt315, here's a picture for reference. The coaxial wire seems like it has teflon around the center conductor, then a spiral shield and a jacket over that. The jacket enclosing both coaxial wires also seems to have a support of polypropylene or something similar, which is not visible as I had already cut it back before I took the picture.
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thank you for pic. dual/double/twin coaxial/coax, but with multistrand central wires. i will look in a cataloque but it is old.
as a simplest way you may take two coax and put them in thermotube.Comment
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I have a reel at home of 2-core screened microphone cable that I've used before on a PI design.
https://www.yourspares.co.uk/parts/y...lue-E648E.aspxComment
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i suggest to people to seek out VGA-SVGA monitor cable. they are due trashboxed and everyone can take them much around.Originally posted by Qiaozhi View Post
this type of cable has all variations of using - from ordinary PI to complex VLF coil with the preamplifier with outer voltage DC supply.
it has - three hoax, for R G B, etc.
https://monitor4ik.com/wp-content/up...19/03/Scr1.pngComment
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kt315, thanks for the picture of the SVGA cable. It seems like a great idea too! Would all those extra conductors need to be attached to ground? I didn't know if they could all act as little antennae for EMI.Comment
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Yes, the adhesive inside is a high-temp hot melt glue.Comment
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This cable is not suitable for mechanical and temperature properties. The central veins of the coax are very thin and break. Waste of time and nerves afterwards.Originally posted by ihatesanity View Post
Sorry for my English - google translator.
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just two posts and so much insinuation. why i must prove you something in what you do not understand? did you cut this cable? never.Originally posted by August View Post
yes, metdet.ru site is closed but it was used for the projects. who are you? what is your county? you are the professor or Preston University?
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Why are you reacting so hotly?
I have worked with these cables since 1994, so I have my own opinion.Comment
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