Coil Housings

[hobbes_lives]

It seems that Hays Electronics is the source that many of you use for coil housings. I am curious if there are any other sources for coil housings that you know of, or if anyone has made their own coil housings? If you have made one yourself, how did you go about it?

[bbsailor]

It seems that Hays Electronics is the source that many of you use for coil housings. I am curious if there are any other sources for coil housings that you know of, or if anyone has made their own coil housings? If you have made one yourself, how did you go about it?

What you can use depends on the type of coil you intend to make.
A mono coil is the easiest and allows you to use almost anything non-metalic and what ever shape you can find such as:

Plastic paint can lids
Frisbees
Plastic Plates
Commercial Metal Detector coil covers. White's has a good selection.

For a DD coil or concentric coil your choices are more limited as you need to physically align and secure multiple windings.

The creative use of 3/8" to 1/2" plastic water pipe will also work but threading the wire requires more work and shielding this type is more of a challenge.

Good Luck.

bbsailor

[Fred]

It seems that Hays Electronics is the source that many of you use for coil housings. I am curious if there are any other sources for coil housings that you know of, or if anyone has made their own coil housings? If you have made one yourself, how did you go about it?

Hi,
One of the best coil housing i have found comes from PC monitor´s foot (CRT).
If you have one look at it and you will see how nice it is
Need to be at least 17" monitor if you want around 20cm coil...
regards,
Fred.

[Max]

It seems that Hays Electronics is the source that many of you use for coil housings. I am curious if there are any other sources for coil housings that you know of, or if anyone has made their own coil housings? If you have made one yourself, how did you go about it?

Hi,
there's one best seller in bulgaria... if you don't like buy them from MR. BILL !

I will not advertise it...

Just search on the net! And you will find !

Kind regards,
Max

[hobbes_lives]

Wow, those are some creative ideas!

My intent is to build a mono coil for a PI unit. I was thinking more along the lines of pouring an epoxy or plastic form around a pre-wound, pre-shielded coil, or something of that nature. Has anyone ever tried that?

[hobbes_lives]

... if you don't like buy them from MR. BILL !

Max,

Is Hays Electronics Mr. Bill? I though Mr. Bill was at http://www.surfscanner.com/ , unless we're talking about two different Mr. Bill's. Or do you mean that the Mr. Bill at http://www.surfscanner.com/ sells coil housings too?

(I'm confused.)

[Max]

Max,

Is Hays Electronics Mr. Bill? I though Mr. Bill was at http://www.surfscanner.com/ , unless we're talking about two different Mr. Bill's. Or do you mean that the Mr. Bill at http://www.surfscanner.com/ sells coil housings too?

(I'm confused.)

Uhm... yes big confusion now!

I mean Mr. Bill for Mr. Bill... do you know any other Mr. Bill!?

Kind regards,
Max

[Max]

Wow, those are some creative ideas!

My intent is to build a mono coil for a PI unit. I was thinking more along the lines of pouring an epoxy or plastic form around a pre-wound, pre-shielded coil, or something of that nature. Has anyone ever tried that?

Uhm... you can do... but pure epoxy is heavy stuff... I think is not good for arm, shoulder etc.... better find some PVC plate... put coil inside and then fill with few epoxy as needed. Much more lightweight.

Even better some carbonium sheet with epoxy .... you can shape some carbonium stuff... make it appear as a container and then add just epoxy needed to coils... very rigid and very lightweight too... better than PVC stuff... but not easy and costs also.

I made one good DD for TGS using PVC + foam + epoxy stuff.... light and works PERFECT! I posted an image of it... but now I don't remember where it is... maybe lost in the enormous TGS thread!

Kind regards,
Max

[Qiaozhi]

Wow, those are some creative ideas!

My intent is to build a mono coil for a PI unit. I was thinking more along the lines of pouring an epoxy or plastic form around a pre-wound, pre-shielded coil, or something of that nature. Has anyone ever tried that?

This might be of interest:

[hobbes_lives]

This might be of interest:

That is interesting. Unfortunately, Babel Fish wasn't too much help with the translation to English.

From what I can tell, they made a mold from another existing coil using plaster. Then they used strips of fiberglass mesh dipped in epoxy to form a shell inside the mold. Does that sum it up?

I imagine they would then use the same technique to create the bottom half, and then close it up with fiberglass?

[Qiaozhi]

That is interesting. Unfortunately, Babel Fish wasn't too much help with the translation to English.

Me neither.
Ich spreche nicht Deutsches.

From what I can tell, they made a mold from another existing coil using plaster. Then they used strips of fiberglass mesh dipped in epoxy to form a shell inside the mold. Does that sum it up?

I imagine they would then use the same technique to create the bottom half, and then close it up with fiberglass?

I think that's the general idea.

Babel Fish translation here:
Here also your idea could stand to the building of coils! Spool in self-'s building by Mail of Needles the part of 2 finds it down!! Here a building guidance for a spool made of EPOXY RESIN of the easy, waterproof, and much stable is. Which one needs for it:
1.) a positive sample spools (I have an old person coil as sample taken) or one makes itself a sample from wood (one should however painting).
2.) a firm foil (I have Overheadfolien taken).
3.) approx.. 5 kg gypsum (slow hardening).
4.) a parting agent for Giesharz.
6.) epoxy resin, hardener and glass fiber mat finely (with CONRAD available Modelbau).
7.) moon ash foam ((PUschaum) the thing with which one out-foams getting areas).
8.) 2-components epoxy resin adhesives (EAGLE OWL plus endfest 300) for that bond the enamelled wire and that seal the cable entry. That lasts so far all costing approx.. 35?
So now to the work: For the coil sample from wood one needs to saw a 10mm strong solid wood plate (no clamping plates to use) after, sharpens, bores, sticks, etc. the sample does not paint (please not onto it forgotten which one must be able to install the coil also onto a linkage).
After the coil sample is finished makes one from the foil a container in that the sample sufficiently place has approx.. + 30mm for the diameter of the coil and 150mm high the in such a way produced container with a tape (adhesive tape) close masking with tape. Now we come to produce negatives for the gipsform first the sample well with the parting agent coat and drying let then the sample into the foil container give, thus it with the lower surface at the soil of the container rest upon flat (I have the sample with a double-sided tape at the foil soil stuck it not on to swim can), now the gypsum touch in such a way no bubbles form and the gypsum neither too firmly nor is too liquid it should myself straight pour still let, the gypsum now into the form briskly pour like that that the highest point of the sample approx. 20mm is covered. The whole should approx.. 2-3 days harden
Spools in self-'s building part of 2 by Mail of Needles 20.10.02 after draining the gypsum one must paint the Model around the absorbency gypsum to prevent in addition is suitable a lacquer from the spray box best, afterwards the Model still with the parting agent deletes completely. Now to the outer hull spools:
First approx. 2x5cm there cuts the glass fiber mat on small strips (otherwise problems with that lay it out the close roundnesses gives). Then the epoxy resin with the hardener in a container (however afterwards is not the no more used) to touch no air vesicles to develop in such a way (I needed 50g for the first processing step approx.). now one should work briskly there the epoxy resin "L" only max one. 40 minutes a piece of glass fiber mat with tweezers remains processable dipping in the epoxy resin to the glass fibers transparent, then into the Model to put and with a bristle brush furnish, presses in slightly, bubbles to remove and with resin coat, repeats one to the whole motel with the glass fiber is laid out then laest one the whole for approx.. 16 hours with 20 C° harden or in the baking pipe with 50 C° approx.. 3 hours if the coil covering after that harden and do not remove the Model look in such a way have one it correctly made if not then (GRUMEL)

[Eugene52]

Plastic or Fiberglass ??

I found this thread to continue on with my questions , instead of starting a new thread . Soon I will have to wind coils . And I want to make the coil shells my self , not buy from Hays or have them custom made for $25.00 to $30.00 dollars each !!! If I want 10 coils for $250.00 , well , $250.00 buys a lot of resistors and capacitors or a bunch of cheap I.C.'s !!! I want to know if ABS plastic is available in sheets , I know it will be a stinky process , but ABS can be heated up to form in different shapes from a mold or die. I just want to know the options , like fiberglass cost vs ABS plastic cost . Or if there is another method to put a hardening compound on a coil after the coil is perfectly wound to specs. I am looking for a cheap method to produce 50 to a maximum of 100 coils total . The 3 coil sizes I want will be 8 inch 10 inch and 15 inch and all will be a "double D configuration" . Thank-You for any suggestions.......Eugene

[Sean_Goddard]

I for one think Hays are a waste of time . I've been emailing them for the last three years trying to get a price for some housings including shipping to the UK. TWENTY+ emails and not a SINGLE reply. I don't think they need the money (it was a $200+ order).

[Qiaozhi]

I for one think Hays are a waste of time . I've been emailing them for the last three years trying to get a price for some housings including shipping to the UK. TWENTY+ emails and not a SINGLE reply. I don't think they need the money (it was a $200+ order).

Strange ... I ordered some housings less than 3 years ago without any trouble ... except for the customs charge.

[Eugene52]

I for one think Hays are a waste of time . I've been emailing them for the last three years trying to get a price for some housings including shipping to the UK. TWENTY+ emails and not a SINGLE reply. I don't think they need the money (it was a $200+ order).

Hays Electronics is expensive , that is why I am looking for alternative sources or vendors , or learn to do it my self !!!.......Sean , $200.00 would of got you 3 coil housings + U.S. tax and a $100 U.K. customs fee , oh , and a couple of plastic nuts . ........Eugene