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replacement coil

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replacement coil

Post  john87 on Wed Nov 01, 2017 6:34 pm

Hi All,

I need a new coil for my villiers 9e. Where is the best place to get one or have one rewound?? I have seen "replacements" and in fact ordered on, but they do not seem to have the proper HT termination, just a tag you are supposed to solder the HT lead to.

Any idea where i can get a decent one??

john..

john87

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Coil

Post  kerabo on Wed Nov 01, 2017 6:37 pm

I bought one like you describe but soldered a brass washer to that tag and filed it flat and then the HT lead fits into that

Ken
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kerabo

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Coil

Post  kerabo on Wed Nov 01, 2017 6:39 pm

I bought one like you describe but soldered a brass washer to that tag and filed it flat and then the HT lead fits into that.
I would think Villiers Services would have the correct item.

Ken
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Post  john87 on Wed Nov 01, 2017 7:43 pm

I wonder if i could get the termination off the old coil and solder that on and then hold it to the coil with heat shrink??

john..

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Re: replacement coil

Post  kerabo on Wed Nov 01, 2017 7:56 pm

john87 wrote:I wonder if i could get the termination off the old coil and solder that on and then hold it to the coil with heat shrink??
That's not practical. It's only a brass thin washer. So long as you don't apply heat for too long you can solder to that tag.
Heat shrink is not a good idea
I bet VS have the correct coil to fit straight on

Ken



john..
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kerabo

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New coil!!

Post  john87 on Sat Nov 04, 2017 6:08 pm

Ok, so i have now got the old coil off!!

I could see whara the open circuit was, as, once i had stripped the outer bakelite stuff off, i could see a burnt looking bit, Since the insulation and the adhesive used are formidable stuff, i have no idea what could have caused the fault certainly not corrosion or vibration....

Anyway, How is the coil secured into the pole shoes?? It looks to me like there should be small grub screws, but they are missing?? Were they ever there??

john...

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Re: replacement coil

Post  Mollbhan on Sat Nov 04, 2017 6:20 pm

I have changed a few Villiers coils John but never seen one with grub screws, the coil should just push into the shoes, once screwed in place nothing can move.
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Coils

Post  kerabo on Sat Nov 04, 2017 6:25 pm

Mollbhan wrote:I have changed a few Villiers coils John but never seen one with grub screws, the coil should just push into the shoes, once screwed in place nothing can move.

I have several coils from projects and some do have a grub screw. In fact mine without the grub screw could turn in its clamps so I converted to a small screw.

Ken
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Post  john87 on Sat Nov 04, 2017 6:43 pm

Best i find some small screws then!!

The way i see it, is they did not drill and tap the holes for nothing.. How to find a screw,, That is the next challenge..

john..

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Post  kerabo on Sat Nov 04, 2017 6:55 pm

john87 wrote:Best i find some small screws then!!

The way i see it, is they did not drill and tap the holes for nothing.. How to find a screw,, That is the next challenge..

john..

Keep them small There are quiet fragile.
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Post  john87 on Sat Nov 04, 2017 9:47 pm

I have had a good look now...

There are four screws that retain the coil to the backplate, two large, and two small.

Now, the small ones go into what you would think are grubscrew holes..

Turns out that the coils armature has a small slit machined into the ends. Villiers fitted the coils to the pole pieces, then forced in wedges to expand the armature..

My coil will also do doubt prove to be slak in the pole pieces...

It is either make up short grubscrews that will go in front of the fixing screws, or loctite the coil into the pole pieces... i am not entirely happy with either solution..

john..

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Re: replacement coil

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