camrok
Needs a Life!
Posts: 2,418 
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Post by camrok on Feb 26, 2019 13:53:42 GMT -8
As many of us have these and are happy to service these- has anyone had any luck in repairing coils?  It looks like someone has had a bash at soldering the thin wires to the contact points- I have another that looks like it has a dent to the coil but no fractures I can see. Will upload later. I’ve seen others that have some line of putty or paste over them.  This one is working fine. The simple solution is to replace, but at some point these parts will become scares. Any repair techniques or anyone looking for some coils to repair? |
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Post by rob3rto on Feb 26, 2019 14:03:44 GMT -8
The only thing I've read is that there is a liquid that is used to repair coils.
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pip
WS Benefactor
Berkshire, UK
Posts: 6,176
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Post by pip on Feb 26, 2019 14:44:50 GMT -8
The only thing I've read is that there is a liquid that is used to repair coils. Well if anyone can find this liquid I can stick all my dud H55x coils in a bucket of it and hope for the best! |
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Post by rob3rto on Feb 26, 2019 14:59:29 GMT -8
The only thing I've read is that there is a liquid that is used to repair coils. Well if anyone can find this liquid I can stick all my dud H55x coils in a bucket of it and hope for the best! If it's open circuit you could possibly use conductive paint as used in repairing the rear window heating elements in cars. Just need a very fine brush. |
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Thomas
WIS
Nun Gut
Posts: 1,480
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Post by Thomas on Feb 26, 2019 15:11:35 GMT -8
The only thing I've read is that there is a liquid that is used to repair coils.
Yeannnhh, that doesn't sound right, to an Electrical Engineer. 
On the other hand, I used to hand wind armatures for slot car engines back in the 70's, using some pretty fine wire, so I don't see why you could not re-wire a spool if you had to.
- Thomas
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 26, 2019 15:26:19 GMT -8
I have tried to fix a few 7123 coils but it is nearly impossible.
If the wire is broken on the coil body and not over the ends, forget it because the wire is so thin that it breaks off just trying to manipulate it.
If the wire(s) are broken near the point where the solder to the terminals on the plate then you have a half way decent chance of adding a short piece of wire with solder.
Using conductive paints or similar will not work even though you complete the circuit. All of these things have enough resistance to change the L/R of the circuit and will either not work or will make the coil too weak for proper operation.
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Thomas
WIS
Nun Gut
Posts: 1,480
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Post by Thomas on Feb 26, 2019 15:51:52 GMT -8
. I have tried to fix a few 7123 coils but it is nearly impossible.
If the wire is broken on the coil body and not over the ends, forget it because the wire is so thin that it breaks off just trying to manipulate it.
If the wire(s) are broken near the point where the solder to the terminals on the plate then you have a half way decent chance of adding a short piece of wire with solder.
These all sound like the "words of WISdom"! 
Thomas
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camrok
Needs a Life!
Posts: 2,418
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Post by camrok on Feb 26, 2019 15:55:36 GMT -8
Are we going to get to a point where we need to manufacture a replacement coil? Surely there would be a machine somewhere in the universe, clever enough to do this for cents.
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pip
WS Benefactor
Berkshire, UK
Posts: 6,176
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Post by pip on Feb 26, 2019 16:04:58 GMT -8
Are we going to get to a point where we need to manufacture a replacement coil? Surely there would be a machine somewhere in the universe, clever enough to do this for cents. It could do it for cents then I’d pay dollars. Especially if it was Aus$ by the way, I like those. |
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Post by acidstain on Feb 26, 2019 16:53:21 GMT -8
They do sell something called “circuit maker” in watch supply shops. Though its named “circuit” it is indeed a liquid you paint over the coil. I do not know the limitations of this product, but it sells well.
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longbike
Is a Permanent Fixture
Aqualand Addict
Posts: 6,430
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Post by longbike on Feb 26, 2019 20:03:10 GMT -8
Aloha
I was once told that to wrap a Coil like for generators ,etc. that it has to have a certain .... ( Amount of wire
wrapping's and maybe some good tight tension of the wire )
Could be just a say thing but it came from a ....Electrical Guy.
Just was wondering also.
Louis
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 26, 2019 21:25:59 GMT -8
Aloha I was once told that to wrap a Coil like for generators ,etc. that it has to have a certain .... ( Amount of wire wrapping's and maybe some good tight tension of the wire ) Could be just a say thing but it came from a ....Electrical Guy. Just was wondering also. Louis Yep, you're right Louis. The gauge and length of the wire is important...this coming from an electrical guy |
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longbike
Is a Permanent Fixture
Aqualand Addict
Posts: 6,430
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Post by longbike on Feb 27, 2019 9:34:56 GMT -8
Aloha I was once told that to wrap a Coil like for generators ,etc. that it has to have a certain .... ( Amount of wire wrapping's and maybe some good tight tension of the wire ) Could be just a say thing but it came from a ....Electrical Guy. Just was wondering also. Louis Yep, you're right Louis. The gauge and length of the wire is important...this coming from an electrical guy Thank you Sir , the was when I was on a transport ship right before going into the jungles in Vietnam we saw a Electricians wire rig up and he was wrapping a .... Armature from a Electric Generator for repairs. Louis |
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