I just received my order of 10 Jantzen air coils from Nonsolospeakers
Take a look on the picture, theses Jantzen coils seems definitely not in pure copper as they should be... but in aluminum wire...
I contacted Jantzen Audio which confirm: No, we do not manufacture aluminum wire or foil induction coils, as they are usually only for industrial applications, not audio.
We have not sold any coils directly to Nonsolospeakers, but that does not mean that they did not buy our coils via one of our official channels (distributors).
The answer of Nonsolospeakers is: the product is original the coil is covered with tin to avoid oxidation and to facilitate welding.
Our official channel (Jantzen distribution) is contacting Mr. Michael Dahl, you will receyved soon confirm from Jantzen
Regards
Where is the mistake ? 😡
Take a look on the picture, theses Jantzen coils seems definitely not in pure copper as they should be... but in aluminum wire...
I contacted Jantzen Audio which confirm: No, we do not manufacture aluminum wire or foil induction coils, as they are usually only for industrial applications, not audio.
We have not sold any coils directly to Nonsolospeakers, but that does not mean that they did not buy our coils via one of our official channels (distributors).
The answer of Nonsolospeakers is: the product is original the coil is covered with tin to avoid oxidation and to facilitate welding.
Our official channel (Jantzen distribution) is contacting Mr. Michael Dahl, you will receyved soon confirm from Jantzen
Regards
Where is the mistake ? 😡
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you can easily and definitely find out by the weight
but why is the left coil redish? you think its just lacquer on the aluminium wire?
that would be weird
plus, its not easy to solder aluminium wire
but why is the left coil redish? you think its just lacquer on the aluminium wire?
that would be weird
plus, its not easy to solder aluminium wire
I had a look at a magnified version of a Jantzen coil and the ends are definitely tinned but they have the normal reddish copper color of copper wire , the photo in the 1st post looks very pale in comparison .
One certain way to prove that is -
1- produce engineers hand file.
2-file a few mm of the wire ends .
3- if its all pale white dust it aluminum--if its reddish its copper .
One certain way to prove that is -
1- produce engineers hand file.
2-file a few mm of the wire ends .
3- if its all pale white dust it aluminum--if its reddish its copper .
Jantzen,s own website state --in big red capital letters -
We strongly recommend customers to only order from official distributors ---
Its not often you come across that on a website so forcefully stated --
signifying ?--- connect the dots.
They additionally state --French ?
buy from Audiophonics.
Wil Audio.
Not one of the very long list of EU countries / Asia/ USA/Canada recommend --Nonsolospeakers.
We strongly recommend customers to only order from official distributors ---
Its not often you come across that on a website so forcefully stated --
signifying ?--- connect the dots.
They additionally state --French ?
buy from Audiophonics.
Wil Audio.
Not one of the very long list of EU countries / Asia/ USA/Canada recommend --Nonsolospeakers.
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Got this answer from Jantzen Audio confirm my coils are genuine copper Jantzen coils, many thanks to Michael :
I was contacted by our official in Italy (A--------) and they have confirmed that they supplied Nonsolospeakers with your coils.
A------- buys coils in bulk from us, as they also supply the OEM industry, which explains why the coils were without stickers.
When you use a wire cutter to snip the wires were the tinning is done, you push together the material and this makes it look grey or like aluminum.
If you were to unwind the coil and snip the wire further in, the result would be different.
The Mundorf coils are delivered without tinned ends, so obviously you will not have the same thing happen when snipping the lead-wires for those coils.
With the reassurance by A--------, I can guarantee and conclude that the coils you have received are genuine Jantzen Audio coils.
If you are still in doubt you can do a few control tests:
Weigh the coils – aluminum wire coils would be noticeably lighter
You can find the nominal weight information for our Air Core Coils here:
http://www.jantzen-audio.com/wp-content/uploads/2020/05/Air-Core-Wire-Coil-Values.pdf
Measure the coils - using the same link above you can see the nominal DCR (ohmic resistance) of the coils.
If the coils were made from aluminum wire, they would have significantly higher resistance figures.
Example:
A meter of copper wire with a cross section of 1 mm2 will have a resistance of 1,7 milliohms, where a aluminum wire with the same cross section has a resistance of 2,5 miliohms.
This means that coils made from 1,00 mm aluminum wire would have a significantly higher DCR figure than a similar coil made from 1,00 mm copper wire.
Kindly note that if you wish to measure the DCR of the coils, you will need a professional grade LRC meter or something like DATS measuring system.
You cannot correctly measure coils below 0,1 ohms using a hobby style “multimeter”.
I hope this clarifies everything.
Michael
Kind Regards
Michael Dahl Jantzen
I have check the weight of one 0.8mH - 1mm coil and the weight is the same as in datasheet so it's copper, all my apologies for this wrong alert.
I was contacted by our official in Italy (A--------) and they have confirmed that they supplied Nonsolospeakers with your coils.
A------- buys coils in bulk from us, as they also supply the OEM industry, which explains why the coils were without stickers.
When you use a wire cutter to snip the wires were the tinning is done, you push together the material and this makes it look grey or like aluminum.
If you were to unwind the coil and snip the wire further in, the result would be different.
The Mundorf coils are delivered without tinned ends, so obviously you will not have the same thing happen when snipping the lead-wires for those coils.
With the reassurance by A--------, I can guarantee and conclude that the coils you have received are genuine Jantzen Audio coils.
If you are still in doubt you can do a few control tests:
Weigh the coils – aluminum wire coils would be noticeably lighter
You can find the nominal weight information for our Air Core Coils here:
http://www.jantzen-audio.com/wp-content/uploads/2020/05/Air-Core-Wire-Coil-Values.pdf
Measure the coils - using the same link above you can see the nominal DCR (ohmic resistance) of the coils.
If the coils were made from aluminum wire, they would have significantly higher resistance figures.
Example:
A meter of copper wire with a cross section of 1 mm2 will have a resistance of 1,7 milliohms, where a aluminum wire with the same cross section has a resistance of 2,5 miliohms.
This means that coils made from 1,00 mm aluminum wire would have a significantly higher DCR figure than a similar coil made from 1,00 mm copper wire.
Kindly note that if you wish to measure the DCR of the coils, you will need a professional grade LRC meter or something like DATS measuring system.
You cannot correctly measure coils below 0,1 ohms using a hobby style “multimeter”.
I hope this clarifies everything.
Michael
Kind Regards
Michael Dahl Jantzen
I have check the weight of one 0.8mH - 1mm coil and the weight is the same as in datasheet so it's copper, all my apologies for this wrong alert.
Hi. I'm interested in your comment as I have seen some advice to skip winding your own on speaker forums from members who seem to have experience. Those comments indicated that it's troublesome to get the wire to hold its form until bound and also to arrive accurately at the desired inductance.
Would you share how you have done it? (tools/technique?)
Thanks
You have plenty of air coil calculators on the net.
For winding, any temporary cylinder core will do, AA battery, C battery, tool handle, what have you.
For winding, any temporary cylinder core will do, AA battery, C battery, tool handle, what have you.
The difference between copper and CCA is normally obvious from the weight, the
densities differ by more than a factor of 3. Al has significantly higher resistivity than copper,
so you will get higher losses if you just substitute CCA for copper.
Winding should be done tightly and neat for consistent properties - once you find a suitable former
you can jury-rig some sort of axle to hold it using a cordless drill, but if you want an
easy life there are cheap hand-winding machines with mechanical turn-counters.
densities differ by more than a factor of 3. Al has significantly higher resistivity than copper,
so you will get higher losses if you just substitute CCA for copper.
Winding should be done tightly and neat for consistent properties - once you find a suitable former
you can jury-rig some sort of axle to hold it using a cordless drill, but if you want an
easy life there are cheap hand-winding machines with mechanical turn-counters.