Solid silver teflon coated wire

[Ism]

Besides expense, any pros or cons vs stranded silver plated copper wire of the same AWG?

[Rov]

Hi,what about multistranded solid silver teflon coated,or single strand solid enamel coated aluminium wire?
Ive tried both for interesting result.very fast coils,and exceptional lower ohms resistance.many PI wont handle these .because of faster timings required.
this is for just experimental Mono for PI.in various sizes and configuraration.
I havent heard or ever got any feedbacks from other experimental coil builders working in this area?and results.
regards Rov

[Ism]

I wouldn't hesitate to try "teflon coated multi-strand solid silver wire", but not sure about "teflon coated single strand solid silver wire". Any help would be appreciated. I have the chance to get some but don't want to purchase sonething I can't use or that won't perform better than "teflon coated multi-strand silver plated copper wire".

Thanks

I forgot to mention the coils are for a TDI. I'm ready to build a couple more and in the market to purchase wire.

[WM6]

I havent heard or ever got any feedbacks from other experimental coil builders working in this area?and results.

Aziz discussed about this (Alu coil wire or Alu coil tape) in his main MD project.

[Rov]

Hi,Belden cables will still do silver strand teflons in their cables and wire range ,but for a $$$ price. Not cheap!The Enamel solid aluminiums wire are thru Sharp.Japan special orders and requests only! special order for Microwave oven Transformers use,power supply to Magnetron.
Surpose this all is now source thru Chinese manufacture 2010.
doensnt matter for me for the short term as ,I got several hundreds meters of each.
But his will only still do a dozen or so specialty coils,an then Im out!!
I like the Aluminium wires tho in larger awg. for performance, and conductivity,conductivity skin effect. eddy ,back emf.for Fast timings on Pi.
Just the Drive circuitry on many Pi front ends,not capable without major mod!
anyway,not much Real info on the net. for what people are doing with a bit of real spec.
not just a bit of manipulated Cro outputs??
I like real coil builds,with real meter measurements and a real.milligauss field outputs.
on these coils.
You dont see this on the net?
maybe soon?
regards Rov

[Tinkerer]

Hi,Belden cables will still do silver strand teflons in their cables and wire range ,but for a $$$ price. Not cheap!The Enamel solid aluminiums wire are thru Sharp.Japan special orders and requests only! special order for Microwave oven Transformers use,power supply to Magnetron.
Surpose this all is now source thru Chinese manufacture 2010.
doensnt matter for me for the short term as ,I got several hundreds meters of each.
But his will only still do a dozen or so specialty coils,an then Im out!!
I like the Aluminium wires tho in larger awg. for performance, and conductivity,conductivity skin effect. eddy ,back emf.for Fast timings on Pi.
Just the Drive circuitry on many Pi front ends,not capable without major mod!
anyway,not much Real info on the net. for what people are doing with a bit of real spec.
not just a bit of manipulated Cro outputs??
I like real coil builds,with real meter measurements and a real.milligauss field outputs.
on these coils.
You dont see this on the net?
maybe soon?
regards Rov

Hi Rov,

aluminum wire can reduce the weight of a high power coil. The problem I see, is the soldering of the coil wire to the cable connecting to the board.

Silver wire also would reduce the weight, smaller volume also could reduce the inter-wire capacitance where this might be useful. The problem is the cost.

Tinkerer

[Rov]

Hi Tinkerer,for connecting the aluminium wires etc. I use electrical Ferrules,as per used in wiring up switchboards and contactor for plc etc.these just crimp on.then you have an easy solderable solution to your coil lead cable
also MultiCore UK do specialty solders suitable for even aluminium and other metals.an not overly expensive.
regards Rov

[Ism]

Rough Research

Thanks Rov for the response, but this topic quickly took a left turn and no answer to my question was forthcoming. I did a little "rough" research and found that solid or stranded solid silver wire is effective at audio frequencies. Since my TDI runs from as low as 10us, the pulse frequency would be 100khz. Therefore skin effect will have to be taken into consideration. So solid silver most likely would not be an improvment over silver coated copper wire.

Rov,
On another note, I would not use crimp terminals on aluminum wire. Aluminum cold flows and is suseptable to galvanic corrosion when touching a dissimilar metal. If you do crimp, soldering should be considered. Over time the connection will loosen. This was a problem experienced with aluminum in home wiring. The connections would loosen over time and heat up causing a fire. I don't think any coils are going to burst into flame, but you may experience problems with performance in the long run.

[WM6]

On another note, I would not use crimp terminals on aluminum wire. Aluminum cold flows and is suseptable to galvanic corrosion when touching a dissimilar metal. If you do crimp, soldering should be considered. Over time the connection will loosen. This was a problem experienced with aluminum in home wiring. The connections would loosen over time and heat up causing a fire. I don't think any coils are going to burst into flame, but you may experience problems with performance in the long run.

Unfortunately this is true.

But Alu wire can be soldered: you only need very hot soldering iron (say 150W or even more) sand paper and (acidic) solder paste. End of wire have to be thoroughly sanded and immediately moistened with a paste (before oxidize again). We need plentiful of soldering paste at the ends of wire and enough of solder on hot soldering iron for the rapid completion of work before Alu oksidize again.

[Ism]

Your right WM6, I worded it wrong (If you do crimp, soldering should be considered). I was thinking of soldering the crimp but then why use a crimp...doh! but yes soldering is needed. As Rov said, there are exotic solders that overcome the difficulty of soldering Al, Certaium being one brand I know of.

[Rov]

Hi just thinking on crimps again?the aluminium wires mentioned have use in microwave ovens,and observing the manufacture of connecting this wire type to other wire and components Not aluminium,they are all crimped.So my train of thought had been if commercial applications find it suitable to crimp,then this must be to a electical standard for assembly,is all.Yes I appreciate a galvanic action can take place between disimilar metals.but for a few experimental coils ive built,never an issue.
I can suggest try it an see?You are building coils yourself at the moment?or compiling the best available datas and components before building.
It is a project coil for TDI? look forward to your test and results.

[WM6]

the aluminium wires mentioned have use in microwave ovens,and observing the manufacture of connecting this wire type to other wire and components Not aluminium,they are all crimped.

.

Yes, you are right. In regular oven (furnace) too.
This is due good reasons.
At high temperature or high current, solder can melt and wire contact lost.
So mostly contacts in oven are not only crimped but clamped together too, instead of soldered.
Such solution can be easier serviceable too.
Where possibilities of high temperature is not the case, contacts are better resistant to environment impact when soldered than clamped together.

[Ism]

Yer right, for experimental purposes crimp is just fine. I am coming from a different mindset and was thinking of permanent applications.

For my TDI, I have made a couple coils 8" dual, 8" mono and 10" mono with good results. The cold weather is here and I am planning a couple new ones with better materials. I have enough supplies for a few more but need more wire. Hence my original question. I will stick to the silver plated copper with teflon insulation for the time being. I may try a solid silver wire in the future if a small quantity comes available at a decent price. If so I will post what I discover.