The Litz wire thing...

[golfnut]

The prices are rediculous though. S

[Tepco]

This gonna be expensive! 0.025mm is around AWG50, resistance some 37R\m, considering some 20m is needed for coil, resistance will be like this

100GRAMS 252 Strands of 0.025mm Silk Covered Stranded Copper Litz Wire, around 3 Ohm

100GRAMS 400 Strands of 0.025mm Silk Covered Stranded Copper Litz Wire, around 1.85 Ohm

Now, question is how long can be 100g package, cannot be calculated due to unknown insulation type and quantity used, but, by all chance not enough for one coil.

[Midas]

This gonna be expensive! 0.025mm is around AWG50, resistance some 37R\m, considering some 20m is needed for coil, resistance will be like this

100GRAMS 252 Strands of 0.025mm Silk Covered Stranded Copper Litz Wire, around 3 Ohm

100GRAMS 400 Strands of 0.025mm Silk Covered Stranded Copper Litz Wire, around 1.85 Ohm

Now, question is how long can be 100g package, cannot be calculated due to unknown insulation type and quantity used, but, by all chance not enough for one coil.

I calculated it as 56m for 100g of the 400 strand if it was pure copper. Even with 50% insulation weight which seems a lot to me (its only silk and enamel after all )... you should scrape it in. Mind you there's a pretty good price break if you can stretch to the 500g.

[Skippy]

I've just done a quick analysis of one of the 'Wires.co.uk' Litz wires, that they give length data for. The 500g of 81/0.1mm double-silk is described as about 80 metres length. This is equivalent to a single core wire 0.9mm diameter, which my wire databook tells me has resistance/metre = 0.027 Ohms, and a weight of 5.65g / metre. So 80 metres of 0.9mm diameter wire would weigh 452g. They say 500g for their silk-covered Litz, so as an approximation, 90% of the weight is copper, and 10% is silk. Using this (reasonable sounding) fact, you should be able to calculate lengths etc. of the other 100g / 500g reels they sell. As an example, a coil made with 20 metres of this wire would have a resistance of 0.54 Ohms. The wire cost would be 15 GB Pounds. Edit: for the very fine wires like 0.05mm, 0.032mm, I imagine the enamelling and silk contribute proportionally more, 75% copper/ 25% enamel/silk is quite possible.

[Tepco]

I calculated it as 56m for 100g of the 400 strand if it was pure copper. Even with 50% insulation weight which seems a lot to me (its only silk and enamel after all )... you should scrape it in. Mind you there's a pretty good price break if you can stretch to the 500g.

Yes, this seems to be about correct. (I get lost in metric\imperial translation) Someone better to recheck all this.

[sido]

I've just done a quick analysis of one of the 'Wires.co.uk' Litz wires, that they give length data for. The 500g of 81/0.1mm double-silk is described as about 80 metres length. This is equivalent to a single core wire 0.9mm diameter, which my wire databook tells me has resistance/metre = 0.027 Ohms, and a weight of 5.65g / metre. So 80 metres of 0.9mm diameter wire would weigh 452g. They say 500g for their silk-covered Litz, so as an approximation, 90% of the weight is copper, and 10% is silk. Using this (reasonable sounding) fact, you should be able to calculate lengths etc. of the other 100g / 500g reels they sell. As an example, a coil made with 20 metres of this wire would have a resistance of 0.54 Ohms. The wire cost would be 15 GB Pounds. Edit: for the very fine wires like 0.05mm, 0.032mm, I imagine the enamelling and silk contribute proportionally more, 75% copper/ 25% enamel/silk is quite possible.

Skippy....What exactly do you mean??.

I have been confused with this so called Litz wire thing.....So many to choose from/So may opinions and variables that at least makes you wonder that their is more to experiment, as ML would not have no interest to its viability!!!.....BUT.....Does it matter how the coil wire is wound?.....Well if it does then....new concepts may be developed that are not so complex that people cannot see and understand that they have a benefit in a PI Detector.

Let the experts here explain

Its all about experimenting.....as theory like normal theories...can differentiate from practical experience. Some theories may not be able to be explained in practical terms

Look forward to all experiments here....real practical experiments, suggesting otherwise theory analysis which may seem the norm.

Cheers Sid

[Tepco]

Expert Bruce Candy already explained everything in patent.

[sido]

Expert Bruce Candy already explained everything in patent.

Well, he left alot out........Thats why we are still talking about this topic??
That's why it has been implemented in a MD PI....If not then i will shut the doors and keep quite, unless told otherwise.

Cheers Sid

[Skippy]

Quote:"Skippy....What exactly do you mean??". Be more specific, I might be able to answer better, but basically I'm trying to work out how many metres are there in a 100g or 500g reel of this wire? The supplier doesn't state this, apart from that single stock item (81/0.1mm), so I used that as an example to reverse-engineer the missing data. I have a small length of Litz in front of me at the moment, it's something like 30/0.1mm single-silk covered. I can say the silk will contribute little to the weight. The enamelling might do, though, on the very fine litz wires, like 0.025mm, where the enamel thickness is proportionally thicker compared to the copper wire itself.

[6666]

http://www.mwswire.com/pdf_files/mws...6_17_18_19.pdf

This link will give some good info
it also gives the nearest equivalent AWG size of wire.

[Skippy]

The size of a single-strand equivalent to a Litz wire can be calculated by taking the square-root of the number of strands and multiplying it by the diameter of the individual strand. For example 400 strands of 0.05mm is equivalent to single-core of diameter = Square-root(400) x 0.05mm = 20 x 0.05 = 1.0mm diameter.

[sido]

The size of a single-strand equivalent to a Litz wire can be calculated by taking the square-root of the number of strands and multiplying it by the diameter of the individual strand. For example 400 strands of 0.05mm is equivalent to single-core of diameter = Square-root(400) x 0.05mm = 20 x 0.05 = 1.0mm diameter.

So 1mm single core enamel copper wire will have the same (R) resistance for a equivalent 400 strand 0.05mm LITZ wire??

Hmmmmm