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Fabien Lefebvre 19th August 2010 01:48 PM

High voltage electrical wire for ESL
I am looking for high voltage electrical wire for ESL.
I did find some which is cheap but rather big: diameter of about 6.6mm.
This kind is wire is normally used for neon lights and is rated for 10kV.
I would like to find some much thinner (between 2.7 and 3.4mm), for wiring the tweeters of ESL57 thus capable of withstanding only 1.5kV. I would use it as well for internal wiring of bass panel.
Nexans produces such cable (HT 306) but I do not need 100m of cable (Farnell sells it).
Where can I find such wire ?

Conrad Hoffman 19th August 2010 04:34 PM

1.5KV should be pretty easy. Maybe some ordinary Teflon hook up wire with an added piece of Teflon tubing? Not sure where to get it, but there's also test probe wire rated for that, as well as the wire used on the HV terminal of CRTs.

Calvin 20th August 2010 02:23 PM


double insulated litz wires or silicone insulated litz wires used for measurement purposes are ok. The thickness of the insulation is more than 1mm which is good for much higher voltage than specified. Diameters range from ~2.5mm to ~4mm.


johnmarkp 20th August 2010 03:40 PM

Stereophile did an article on rebuilding Quads back in 06. It has several sources listed for parts, including one for wire. I use them in two rebuilds I did and they worked well.

DaveG 20th August 2010 09:03 PM

Allied #885-0097

Pomona Electronics - 6733-0 - Wire - Hook-Up - Allied Electronics

Fabien Lefebvre 20th August 2010 09:22 PM


Originally Posted by DaveG (

This one looks great ! 3.65mm for diameter if I compute well.
Thanks everybody for your answers: not sure I find the one above in
my neighbourhood thus I will explore other suggestions as well.

Rodeodave 20th August 2010 09:25 PM

I think ignition or spark plug wire would work too...

alexberg 21st August 2010 05:48 PM


Originally Posted by Rodeodave (
I think ignition or spark plug wire would work too...

Especially if they are made of high resistance thread wound around or totally encapsulated into ferrite impregnated plastic core , thus having 10-50k Ohm per meter as well as substantial inductance.
Really old ones with copper conductors will do...

bentl 21st August 2010 06:03 PM

Hi, I must admit that when I built my ESL@s I used what I had of cables.

Bias-voltage is run through thin (0,25mm) tefloncoated hookup wire, and signal before and after stepup trafo is normal speaker cable.

I have a bias voltage adjustable between 0 - 7200v normally running at 5500vdc and signal voltage is max 6000v.

I have not had any problems, flashovers etc.



stokessd 22nd August 2010 01:54 AM

One trick is to go buy some PVC tubing at Lowes or Home Depot etc, and slide a standard piece of wire inside it. It's not elegant, but particularly for prototyping it's hard to beat the ease and price.


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