Where is a good source for coil wire?

[kac]

I have been struggling making a couple coils including one that has the wind numbers and guages from Don and ALL the coils resistance are lower than they should be. I suspect the motor wire I bought from crappy Amazon is not pure copper. This is causing huge headaches for me.

Anyone recommendations for wire brands, sources?
Thanks

[Carl-NC]

If the coils you wound have lower resistance than expected, that's not a bad thing. Lower is almost always better. And if the wire were not pure copper, then it would have higher resistance.

[kac]

But would lower resistance increase the frequency?

[Carl-NC]

What circuit? In an LC oscillator, the coil resistance has little effect on the frequency but has a large effect on the Q. If you are getting a too-high oscillation frequency then it sounds like the inductance is low, which would correlate to a low resistance.

[ivconic]

Unfortunately, I noticed that the new copper wire coming from the east is not pure copper but has iron/steel in the alloy.
Which drastically changes everything about making coils. Such wire is bad for making coils. What is the solution?
"Degauss" coil from a CRT TV, the older the better. The highest quality copper wire can be found there.
Old transformers too. The older the better.
Because back then, in those times, no compromises were made, everything was done with high quality.
Either that... or buy copper wire from a reputable manufacturer that guarantees the alloy composition.
How to know? Well, the price is mostly the first indicator.
I didn't think much about the resistance and the effect on the quality of the coil.
But I have noticed in practice that coils made with "eastern" wire do not work well.
While I was making SMW,TGSL series and coil series for them; I clearly noticed the difference.
The former for winding is the same, the number of windings is the same, everything is the same, the balance is the same on the instruments... and the differences in operation are drastic.
I think that the magnetic property of the conductor plays a role there. Copper has weaker magnetic properties than iron and steel.
Obviously for the coil to work very well; the material/wire should have weaker magnetic properties.
There is a process of "suction" or even "diversion" of the electro-magnetic field if it is a conductor with better magnetic properties.
Of course, this is how I explain it in layman's terms. A deeper analysis would give a more correct answer.

[moodz]

https://www.remingtonindustries.com/...6-spool-sizes/

[kac]

Wire I bought was from Remington. Not only is it out of spec in guage ( they include the shielding in their measurements) but conductivity is lower than it should be. Your probably right about wire from the east, might explain why their motors under perform.

[kac]

Small update. I took a section of wire from Remington brand and stripped off the insulation so its just bare copper. Tossed it in some Ferric Chloride and left it for a few hours. So far only a little bit fell off but the rest has no color change.
Even burning the wire barely shows any green.

If the wire had zinc in it then it would turn black from the FeCl but color didn't really change at all and was resistant to the FeCL which to me suggests it has tin in it so it's not copper wire as they said and marked but a bronze alloy.

Will probably order some spools from McMaster as they will take the wire back if its not working. They also don't sell Remington brand wire.

My guess is the company off shores their manufacturing and is selling crap.

Very disappointing.

[moodz]

Small update. I took a section of wire from Remington brand and stripped off the insulation so its just bare copper. Tossed it in some Ferric Chloride and left it for a few hours. So far only a little bit fell off but the rest has no color change.
Even burning the wire barely shows any green.

If the wire had zinc in it then it would turn black from the FeCl but color didn't really change at all and was resistant to the FeCL which to me suggests it has tin in it so it's not copper wire as they said and marked but a bronze alloy.

Will probably order some spools from McMaster as they will take the wire back if its not working. They also don't sell Remington brand wire.

My guess is the company off shores their manufacturing and is selling crap.

Very disappointing.

WOW ... they are US based ? ... What are the consumer protection laws in America or I suppose its a State thing. Sounds like product misrepresentation and fraud.

[pito]

I don't see any reason to cry, they gave you a better wire than pure copper, and if they gave you a silver wire, would you cry too?

[kac]

Silver wire would still be a problem since its conductivity is different than what the coil calculator is estimating. Company sold substandard crap. Evidently they no longer sell on Amazon so good chance others had issues.

[pito]

Forget calculations and show as your coil = picture

[Carl-NC]

What TX circuit are you using where too-low resistance is a problem?
I've used magnet wire from Remington, never had a problem. Also MWS, Essex, and Rea, and probably some discount Chinese wire. Never seen anything that wouldn't work.

[kac]

Pic of core I am using to wind the copper on my winding machine. I will later make a housing this will be epoxied into.
Think I found another brand and they indicate the wire is pure copper so will buy new spools. I posted the specs on another topic and this is for a delta pin Tesoro.

Of the 3 coils I tried to make including Don Bowers all were epic fails as the winds needed were no were close to the specs they should be and why I questioned the wire itself.
Will let you guys know how it goes.

[Carl-NC]

Of the 3 coils I tried to make including Don Bowers all were epic fails as the winds needed were no were close to the specs they should be and why I questioned the wire itself.

What were the specs, and what were the results? What diameter, number of turns, and gauge of wire? Even if the wire has a higher resistivity the inductance should be good, and the coil will likely work just fine.